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  3. Paper 2: class practical questions

Paper 2: class practical questions

Answer the four Paper 2 Section A questions on any class practical: describe the method, explain a concept, compare and contrast methods and design a study, using a practical record and the method × concept grid.

  • IB Psychology
  • Exam skills
  • SL and HL

28 min readLast reviewed 15 Oct 2026

Section A of Paper 2 asks four compulsory questions about one of your class practicals. The question names the research method (interview, observation, survey or questionnaire, or experiment) and you answer about the practical you carried out with that method. Because the method is not known in advance, you need to be ready to answer on all four.

The four question types are the same in every session; only the method and the concept change. That makes Section A one of the most predictable parts of the course. Students who prepare a clear record of each practical and practise each question type on each method can plan most of their answers before they enter the exam room.

What the four questions ask

Each question tests a different skill, signalled by its command term. The first two are worth 4 marks each and the last two 6 marks each. Each is marked with its own markband, and the markbands reward different things.

Question

Typical wording

Command term and skill

What the top band rewards

1a [4]

Describe how you used an interview or focus group in your class practical.

Describe: a detailed account of the method as used

Detailed knowledge of the research methodology of your practical, with accurate terminology

1b [4]

Explain the concept of bias in relation to your interview or focus group class practical.

Explain: the concept with reasons, applied to your practical

Well-developed understanding of the concept, with clear and detailed links to the practical

1c [6]

Compare and contrast the use of an interview or focus group in your class practical with an experiment.

Compare and contrast: similarities and differences, referring to both methods throughout

Both similarities and differences discussed in detail, with method terminology used effectively

1d [6]

Design an observation to investigate the same topic as you investigated in your class practical.

Design: a plan for a new study on the same topic

A procedure explained with accuracy and detail, with method terminology used effectively

The focus of all four questions is the research method, not the context the practical was set in. In an interview practical on exercise and mood, the marks come from showing how an interview works, what it can and cannot show, and how its design decisions affect its data, so the psychology of mood itself needs no more than a sentence.

Section A questions are about the method you used, not the topic you studied. Every sentence should show knowledge of research methodology applied to your practical: design, sampling, data, analysis, ethics and the concepts. Background psychology about the topic earns nothing.

A practical record listing aim, procedure and design, sampling technique and sample, findings, ethical considerations, concept points and notes on other methods, with arrows to the four Paper 2 Section A questions: 1a describe [4], 1b concept [4], 1c compare and contrast [6], 1d design [6].A practical record listing aim, procedure and design, sampling technique and sample, findings, ethical considerations, concept points and notes on other methods, with arrows to the four Paper 2 Section A questions: 1a describe [4], 1b concept [4], 1c compare and contrast [6], 1d design [6].
One well-kept record supplies every Section A answer: the aim and procedure feed 1a, the concept points feed 1b, and notes on the other three methods prepare 1c and 1d.
YouTube
Themantic Education (Travis Dixon): an overview of the new Paper 2, including the four class-practical questions and what each one asks for.

Preparing a practical record

The course advises keeping a short record of each class practical. It is not assessed, but it is the single most useful revision document for Section A and a useful starting point for the internal assessment. A record written during or straight after the practical holds the details you will otherwise forget: the exact aim, how many participants there were, how they were chosen, which questions or categories were used, and what was found.

What the record contains

Heading

What to write

Used in

Aim

One sentence naming the method, the variables or topic and the participants: “To investigate … in … using a …”

1a, 1d

Method and design

The exact type: semi-structured interview or focus group; naturalistic or controlled, overt or covert, participant or non-participant observation; online or paper questionnaire; true or quasi-experiment, laboratory or field, and the experimental design

1a, 1c

Procedure

Materials (schedule, checklist, questionnaire, task), the setting, how data were recorded, how long it took, any pilot study, what the researcher said

1a, 1b

Sampling technique and sample

How participants were chosen, how many, their age and any relevant characteristics, and why that technique was used

1a, 1b

Data and findings

What kind of data was collected and how it was analysed; two or three concrete findings (themes, tallies, means, a correlation)

1a, 1b

Ethical considerations

Consent forms (and parental consent where needed), right to withdraw, anonymity, any partial deception and the debrief, how data were stored and deleted

1a, 1b

Concept points

Two or three points per concept, each tied to a decision in the practical

1b

Other methods

How the same topic could be studied with each of the other three methods

1c, 1d

The last two headings go beyond the minimum record, but they turn a description into a revision tool. Concept points written in advance mean that the explain question becomes a matter of choosing the best three, not inventing them under pressure. Notes on the other methods mean that a design question is never met for the first time in the exam.

Common mistake

Keeping a record of the topic rather than the method: “We found that students who exercise feel less stressed.” A useful record says how that was found: “Six Grade 11 students in one focus group, recruited by opportunity sampling; a semi-structured schedule of eight open questions; the transcript was analysed by thematic analysis and produced three themes.” Only the second version can be used in Section A.

A worked record: a focus group on managing exam stress

The following practical record is used in the interview model answers. The details are hypothetical, but they show the level of precision that a record needs.

Heading

Record

Aim

To investigate how Grade 11 students describe the strategies they use to manage stress before exams, using a focus group.

Method and design

One focus group of six participants, run as a semi-structured group interview with a facilitator (a student researcher) and a note-taker.

Procedure

An interview schedule of seven open questions (for example, “What do you do in the week before an exam to look after yourself?”) with planned probes; piloted with two students, after which one leading question was reworded. The group met in an empty classroom after school for 35 minutes. The discussion was audio-recorded, transcribed with names replaced by letters, and the recording was deleted after transcription.

Sampling technique and sample

Opportunity sampling: six Grade 11 students (four girls, two boys, aged 16–17) from one psychology class who were free after school. A student-led focus group needs three to eight participants.

Data and findings

Qualitative data: one 6,200-word transcript. Two students coded it separately using thematic analysis, then compared codes and agreed three themes: “planning as control” (timetables and lists reduce worry), “escaping through screens” (gaming and social media used to switch off, often with guilt afterwards) and “peers as both help and pressure” (studying together helps, comparing revision hours increases stress).

Ethical considerations

Signed consent forms with the aim, the right to withdraw at any time and the right to skip any question; no questions about mental health conditions or diagnosis; group members agreed not to repeat what others said; anonymised transcript; participants were offered a summary of the themes; the teacher supervised.

Add to your notes: a one-page record for each of your four practicals using the same eight headings: aim, method and design, procedure, sampling technique and sample, data and findings, ethical considerations, concept points (two or three per concept) and notes on the other three methods. Learn the numbers in it (sample size, number of items or categories, main findings), because precise details are what make a describe answer detailed.

Question 1a: describe how you used the method

The describe question asks for a detailed account of how the method was used in your practical. The markband rewards detailed knowledge of the research methodology and accurate terminology. In practice that means using the precise name of each design decision and giving the concrete detail of your study for each one.

A strong answer covers, briefly, the aim; the type of method and its sub-type; the procedure, including the data collection tool; the sampling technique and sample; how data were recorded and analysed; one or two findings; and the main ethical steps. It does not need an introduction or a conclusion, and it does not evaluate. Some versions of the question ask explicitly for the aim and procedure; include both in every answer anyway.

What to name for each method

Method

Terminology the answer should use accurately

Interview or focus group

Structured, semi-structured or unstructured; focus group and facilitator; interview schedule, open questions, probes; rapport; audio recording and transcript; thematic analysis or content analysis; codes and themes

Observation

Naturalistic or controlled; overt or covert; participant or non-participant; observation schedule; behavioural categories and how they were operationalised; event sampling or time sampling; tallies; inter-rater reliability; field notes if qualitative

Survey or questionnaire

Closed and open items; Likert scale; reverse scoring; existing scale or new items; pilot; administration (online or paper, anonymous); response rate; scoring; descriptive statistics or a correlation

Experiment

True or quasi-experiment; laboratory or field; independent variable (IV) and dependent variable (DV), operationalised; independent samples design, repeated measures design or matched pairs; random allocation or counterbalancing; standardisation of instructions; hypothesis; mean or median per condition

Exam tip

Write 1a in the past tense and the first person plural or singular (“We used a semi-structured focus group…”). It describes what actually happened in your practical, so specific numbers, materials and decisions are what make it “detailed”. Avoid general statements about what the method usually involves.

Worked example

Describe how you used an interview or focus group in your class practical, including its aim and procedure. [4]

Show a model answer

Model answer. The aim of our practical was to investigate how Grade 11 students describe the strategies they use to manage stress before exams. We used a focus group, a form of semi-structured group interview, because it showed how students talk about stress among peers. The sample was six Grade 11 students aged 16–17 from one psychology class, chosen by opportunity sampling because they were available after school.

A student facilitator followed an interview schedule of seven open questions, such as “What do you do in the week before an exam to look after yourself?”, with planned probes asking for examples. We piloted the schedule with two students and reworded one question that suggested exercise was the “right” answer. The session took place in an empty classroom, lasted 35 minutes and was audio-recorded, while a second student took notes on who spoke. All participants signed consent forms explaining the aim and their right to withdraw or skip questions, and we avoided any questions about mental health conditions.

The recording was transcribed with names replaced by letters and then deleted. Two of us coded the transcript separately using thematic analysis and agreed three themes: planning as a way to feel in control, using screens to escape (often followed by guilt) and peers as both help and pressure.

The model answer gives a precise detail for every methodological decision: the type of interview, the sample size and sampling technique, the tool and an example question, the pilot, the setting, recording and transcription, the analysis and the findings. Each of these shows knowledge of interview methodology, not of stress.

Common mistake

Spending half the answer on the background to the topic (“Stress is a response to perceived demands that…”). The 1a markband is about the research methodology of the practical. One sentence of aim is enough; the rest should be method.

Worked example

Describe how you used an experiment in your class practical. [4] A student’s record says: “Aim: effect of a phone on the desk on digit span. 24 Grade 12 students, two classes, randomly allocated by drawing numbers. Phone face down on desk vs phone in bag in another room. Digit span on laptop, standard instructions read from a script. Mean span 6.4 (phone on desk) vs 6.9 (phone in bag).” Turn the record into the opening of a 1a answer, naming the terminology it should use.

Show the solution

Step 1: name the type and design. “We carried out a true experiment in a classroom under controlled conditions, with an independent samples design.” The design must be justified in a phrase: each student could do the digit-span test only once without practice effects.

Step 2: operationalise the variables. “The IV was the location of the participant’s own smartphone: face down on the desk, or in their bag in another room. The DV was digit span, the longest sequence of digits recalled correctly in order on a laptop task.”

Step 3: sample and allocation. “Twenty-four Grade 12 students from two classes took part (opportunity sampling) and were randomly allocated to conditions by drawing numbers, giving 12 per condition.”

Step 4: controls, ethics and result. Standardised scripted instructions, the same room and time of day, consent forms, the right to withdraw, a debrief, and the result as a measure of central tendency: “mean span was 6.4 digits with the phone on the desk and 6.9 with it in another room.”

Question 1b: explain a concept in relation to your practical

The second question names one of the six concepts (bias, causality, change, measurement, perspective or responsibility) and asks you to explain it in relation to the practical. With four methods and six concepts there are 24 possible questions, but a single structure answers all of them.

The markband has two parts: understanding of the concept, and clear and detailed links to the practical. A paragraph that explains the concept well but could have been written about any study stays in the lower band. Each point therefore needs a specific decision from your practical and its effect on the data or conclusions.

Four boxes in a chain: concept explained in general, then a decision in your practical, then its effect on the data or conclusions, then how it was or could be handled; a dashed loop returns to repeat for a second and third decision.Four boxes in a chain: concept explained in general, then a decision in your practical, then its effect on the data or conclusions, then how it was or could be handled; a dashed loop returns to repeat for a second and third decision.
Each link in a concept answer ties the concept to a concrete decision in the practical and then to what that decision did to the data. Two or three of these links, well developed, are enough for 4 marks.

A structure for every concept question

  1. Explain the concept in one or two sentences, in the meaning it has in research: bias as systematic distortion of data or conclusions, measurement as how a construct is operationalised and how reliable and valid the measure is, and so on.

  2. Link it to a specific decision in your practical: your sampling technique, a question you wrote, a category you defined, how you allocated participants, what you told participants.

  3. Explain the effect: what that decision did to the data, or what it means for the conclusions you can draw.

  4. Say how it was handled or could be handled: a control you used, a change you would make.

  5. Repeat for a second (and if time allows, third) link.

The method × concept grid

The grid gives the strongest point for each of the 24 combinations, as a starting point for your own concept points. The detail in each cell must be replaced by what happened in your practical.

Concept

Interview or focus group

Observation

Survey or questionnaire

Experiment

Bias

Social desirability bias in answers; interviewer effects; dominant voices and conformity in a focus group; researcher bias in coding

Observer bias when deciding which category a behaviour fits; reactivity in overt observation; who is present to be observed

Social desirability and acquiescence; leading items; non-response bias and self-selection

Demand characteristics; experimenter expectancy; sampling bias from opportunity samples; order effects in repeated measures

Causality

Cannot establish cause: nothing is manipulated; records what participants believe causes their behaviour

Cannot establish cause in naturalistic settings; can show behaviours that occur together

Usually correlational: bidirectional ambiguity and third variables

A true experiment can, through manipulation of the IV, control and random allocation; a quasi-experiment cannot

Change

Findings suggest interventions; repeat interviews can track how experiences change

Repeated observation tracks developmental change or the effect of a programme

Repeating the questionnaire over time tracks change in attitudes

Tests whether an intervention changes behaviour or cognition

Measurement

Self-reported words, not behaviour; quality of the schedule; credibility of the analysis (second coder)

Constructs operationalised as behavioural categories; inter-rater reliability; direct measurement of behaviour

Constructs operationalised as items; several items and reverse scoring for reliability; validity of self-reported data

Operationalising the IV and DV; whether the DV is a valid measure of the process (internal validity versus ecological validity)

Perspective

Emic and holistic: participants’ own terms; the researcher’s perspective shapes questions and themes (reflexivity)

Categories chosen by the researcher are etic; meaning of behaviour depends on culture

Closed items impose the researcher’s categories; open items allow participants’ own terms

Reductionist: one variable at a time; often cognitive and etic

Responsibility

Consent, right to skip questions, anonymised transcripts, avoiding sensitive topics; how these shaped what was said

Public places only without consent; parental consent for children; no identifiable recordings

Consent page, anonymity, right to stop, no sensitive items, data deletion

Consent, partial deception only when justified, debriefing, right to withdraw data, no stressful tasks

Tip

A quick test for any concept point: if the method and the name of the practical were deleted, would the sentence still make sense about a different study? If so, it is generic. Add the specific item, category, number or decision that only your practical had.

Worked example

Explain the concept of measurement in relation to the observation in your class practical. [4] Record: naturalistic, overt, non-participant observation of 12 children aged 4–5 in one kindergarten class during 20 minutes of free play; three categories (“shares a toy”, “takes a toy”, “plays alone”); event sampling; two observers; inter-rater agreement 80% overall but 55% for “takes a toy”.

Show a model answer

Model answer. Measurement concerns how a psychological construct is turned into something that can be recorded, and how reliable and valid that record is. In our observation the construct was prosocial behaviour in free play, which we operationalised as three behavioural categories on an observation schedule: “shares a toy”, “takes a toy” and “plays alone”. Defining “shares a toy” as “hands a toy to another child without being asked” made it observable, but it meant that other prosocial acts, such as comforting a child who was upset, were not measured, which limits the validity of our measure of prosocial behaviour.

We used event sampling, so every occurrence of each category was tallied during 20 minutes of free play, and two of us observed the same children to check reliability. Agreement was 80% overall but only 55% for “takes a toy”, because we disagreed on whether grabbing a toy that a child had put down counted. This low inter-rater reliability means our tallies for that category may reflect our own judgements rather than the children’s behaviour. Before a second observation we would define the category more precisely (“removes a toy from another child’s hands”) and pilot it on a video of play.

The model answer explains the concept, then makes two links (the operationalisation of categories, and the reliability check), each with its effect on the data and an improvement. Every sentence after the first refers to something that happened in the practical.

Exam tip

For bias, say which kind of bias and who it came from: the sample (sampling bias), the participants (participant bias, social desirability, demand characteristics) or the researchers (researcher, observer or interviewer bias). For responsibility, go beyond listing consent and withdrawal: explain why a step was needed in your practical and how it affected the data, such as students skipping a question or only students who returned consent forms taking part.

Worked example

Explain the concept of bias in relation to the survey or questionnaire in your class practical. [4] Record: online questionnaire on gratitude and friendship satisfaction; link posted in the Grade 11 group chat; 34 of 110 students responded; 10 items per scale on a 1–5 Likert scale, 3 reverse-scored; anonymous; r = 0.46. Write an answer plan.

Show the solution

Step 1: the concept. Bias is a systematic distortion in how data are collected or interpreted that pushes results away from the truth in one direction.

Step 2: sampling bias. Only 34 of 110 students (31%) responded to a link in a group chat, a self-selected sample. Students with close friendships may have been more willing to answer a questionnaire about friendship, which could inflate mean satisfaction and make the sample unrepresentative of the year group.

Step 3: participant bias. Items such as “I often thank my friends for small things” invite socially desirable answers, which could inflate gratitude scores. The questionnaire was anonymous, which reduces this, and three reverse-scored items (such as “I rarely tell friends I appreciate them”) were used to detect acquiescence.

Step 4: effect on the conclusion. If both scales were inflated by the same wish to appear a good friend, part of the correlation of 0.46 could be produced by response style rather than by a real relationship between gratitude and satisfaction.

Question 1c: compare and contrast with another method

The compare and contrast question names a second method and asks you to compare it with the one used in your practical. The top band requires both similarities and differences discussed in detail. Answers that list only differences, which is the most common pattern, cannot go above the middle band however detailed they are.

The command term also requires reference to both methods throughout. A paragraph on interviews followed by a paragraph on experiments is two descriptions, not a comparison. Each sentence should hold both methods together, using linking words such as “both”, “similarly”, “whereas” and “unlike”.

Axes of comparison

The same few axes give both similarities and differences for any pair of methods. Choosing two similarities and two or three differences from the list, each grounded in your practical, is enough for the top band.

Axis

Questions to ask of the two methods

Type of data

Qualitative or quantitative? Words, tallies, scores or measurements?

Control and causality

Is anything manipulated? Are extraneous variables controlled? Can cause and effect be established?

Researcher involvement and bias

How much does the researcher interpret the data? Interviewer, observer or experimenter effects?

Participant awareness and bias

Do participants know they are being studied? Social desirability, demand characteristics, reactivity?

Setting and ecological validity

Natural or artificial setting and task? How far do findings reflect everyday behaviour?

Sample

Typical sample size; how many participants are needed; time per participant

Analysis

Thematic analysis, tallies, descriptive statistics, correlation, inferential tests?

Ethics

Consent, deception, privacy and the special issues of each method

Exam tip

Plan 1c as a short table in the margin before writing: two columns for the two methods, rows for three or four axes. Mark each row S (similar) or D (different). Then write one paragraph of similarities and one of differences, mentioning your practical in every point.

Common mistake

Treating “compare” as meaning differences only. In this course “compare and contrast” means similarities and differences. Two well-explained similarities, such as both methods relying on self-report or both needing consent forms, are what lift an answer from the middle band to the top.

Worked example

Compare and contrast the use of a survey or questionnaire in your class practical with an interview. [6] Use the gratitude and friendship questionnaire record from the bias example.

Show a model answer

Model answer. Both questionnaires and interviews collect self-reported data: in our practical, students rated statements such as “I often thank my friends for small things”, just as interviewees describe their own behaviour in their own words. Both are therefore open to social desirability bias, because participants may present themselves as better friends than they are. Both also depend on well-written questions; we piloted our items with three students to remove unclear wording, as an interviewer pilots an interview schedule.

Neither method manipulates a variable, so neither can establish cause and effect: our correlation of 0.46 between gratitude and friendship satisfaction could run in either direction, and an interview could only show what students believe about the link.

The methods differ in the kind of data they produce. Our questionnaire used closed Likert items, giving quantitative scores from 10 to 50 that could be summarised with means and a correlation, whereas an interview uses open questions and gives qualitative transcripts analysed by thematic analysis. As a result, our questionnaire could not explain why grateful students were more satisfied, while an interview could explore what gratitude means in a friendship and how it is expressed.

The methods also differ in anonymity and scale: our online questionnaire was anonymous and reached 34 students in a week, which reduces social desirability and allows a larger sample, whereas an interview is face to face, so answers may be less candid, and each interview takes so long that samples are small. Finally, the researcher’s role differs: questionnaire items are fixed, so every participant receives exactly the same questions, whereas an interviewer’s probes and reactions vary between participants and can introduce interviewer effects.

The model answer gives three similarities (self-report and its bias, the need for well-written and piloted questions, no causal conclusions) and three differences (data type and analysis, anonymity and sample size, standardisation and the researcher’s role). Every point names both methods and refers to the practical.

Question 1d: design a study with another method

The design question asks you to plan a new study on the same topic as your practical, using a different method named in the question. The markband rewards a procedure explained with accuracy and detail and effective use of the terminology of the new method. It does not reward a perfect study, and it does not need the results.

The key is to keep the topic but change everything that belongs to the method. A student whose experiment was on phone presence and digit span, asked to design an observation, must still study phones and attention, but now as behaviour recorded with an observation schedule in a real setting.

A checklist for every design

Element

What to specify

Aim

The same topic, phrased for the new method (an observation records behaviour; a questionnaire measures self-reported variables and their relationship; an interview explores experiences and meanings; an experiment tests the effect of an IV on a DV)

Type of method

The precise sub-type and why it suits the aim: for example, naturalistic, covert, non-participant observation

Participants and sampling

Who, how many, the sampling technique and why; consent arrangements

Tool and operationalisation

The data collection tool with two or three examples: categories, items, questions, the IV and DV

Procedure

Where, when, how long, who collects the data and how it is recorded; controls or a pilot

Data and analysis

What data result and how they are analysed (tallies and percentages, means, a correlation, themes)

Ethics

The issues specific to this design and how they are addressed

Tip

Topics that work well for all four methods make the design question easier. Phone use and attention, study habits and sleep, exercise and mood, and friendships and online contact can each be studied by experiment, observation, questionnaire and interview. When planning a practical, it helps to check this before choosing the topic.

Worked example

Design an observation to investigate the same topic as you investigated in your class practical. [6] The practical was the experiment on phone location and digit span.

Show a model answer

Model answer. The topic is how the presence of a smartphone affects attention. I would carry out a naturalistic, non-participant observation in the school library during independent study periods, because the library is a public space within the school where students expect to be seen and where attention can be observed in a real task rather than in a digit-span test. The aim would be to investigate whether students who have a phone visible on their desk show more off-task behaviour while studying than students whose phone is not visible.

With the head of the library’s and the school’s permission, and after Grade 11 and 12 students had been told by email that anonymous observations of study behaviour would take place during the term (overt at group level, so that no individual is observed covertly), two observers would sit at fixed positions. The students observed would be chosen by the seating order, not by the observers, to reduce sampling bias.

The observers would use an observation schedule with operationalised behavioural categories: “phone visible on desk” (yes or no, recorded once at the start), “touches or looks at the phone” (each occurrence), “looks away from work for more than five seconds” and “talks to another student”. Using time sampling, each observer would watch one target student for one minute, record which categories occurred, then move to the next student in a fixed order, observing 30 students per session over five sessions.

The schedule would be piloted in one session first and the definitions tightened, and inter-rater reliability would be checked by both observers coding the same 10 students and calculating percentage agreement. No names, photographs or recordings would be taken; any student who asked not to be observed would be skipped. The data would be tallies of off-task behaviours per minute, compared between students with and without a visible phone using the mean and median. Because phone visibility is not manipulated, the observation could show whether visible phones and off-task behaviour go together in real studying, but not whether the phone causes the difference.

The model answer specifies the type of observation and why, the setting, the ethics of observing students, the tool and four behavioural categories, the sampling of behaviour (time sampling) and of participants, the pilot and reliability check, the data and their analysis. It ends with one sentence on what the design can and cannot show, which demonstrates understanding of the method without turning the answer into an evaluation.

Common mistake

Changing the topic to suit the new method. A student who ran an anchoring experiment and is asked to design an interview should not interview students about stress because it is an easier interview topic. The question says “the same topic”, and an answer on a different topic is not a design for the question asked.

Worked example

Design an experiment to investigate the same topic as you investigated in your class practical. [6] The practical was the focus group on how students manage stress before exams. Write a plan.

Show the solution

Step 1: turn the topic into a testable question. The focus group found that students use planning to feel in control. An experiment can test one strategy: does writing a revision plan for the next day reduce self-reported pre-exam stress compared with a control task?

Step 2: type and design. A true experiment with an independent samples design, because a student cannot do both tasks before the same test without the first affecting the second. Forty Grade 11 students from four classes (opportunity sampling) randomly allocated by a random number list to two conditions of 20.

Step 3: IV and DV. IV: a 10-minute writing task the evening before a class test, either “write a plan of what you will revise and when” (experimental) or “write about what you did today” (control, same time and writing). DV: a five-item stress rating scale (1–7, one item reverse-scored) completed online just before the test.

Step 4: controls and procedure. Standardised written instructions sent at the same time; the same class test for all; the person scoring the scale does not know the conditions (single-blind); the true hypothesis is not given in advance to reduce demand characteristics.

Step 5: ethics and analysis. Consent forms, parental consent for any student under 16, no extra stress (the test is a normal class test), the right to withdraw, a full debrief, and the control group offered the planning task afterwards. Compare mean and median stress scores between conditions.

Preparing for all 24 combinations

Because the method in the question is not known in advance, preparation means four practical records and, for each, a set of concept points and notes on the other methods. That sounds like a lot, but much of it overlaps: the axes of comparison are the same for every pair, and the design checklist is the same for every method.

Preparation task

For each of the four practicals

Record

A one-page record with numbers, materials and findings learned

Describe

One timed 1a answer, checked against the terminology list for that method

Concepts

Two or three points for each of the six concepts, each tied to a decision in the practical (24 sets in total)

Compare and contrast

For each of the other three methods: two similarities and three differences (12 comparisons, but only six different pairs of methods, so each pair serves two practicals)

Design

A short plan of the same topic using each of the other three methods (12 plans)

Exam tip

Practise writing 1b answers on the concepts you find hardest. Causality and change are often weakest: causality needs an explanation of why the method can or cannot show cause and effect in your practical, and change can be answered through what the findings could change (a school policy, an intervention) or how the method could measure change over time.

Common problems across Section A

  • Mixing up the questions. Evaluation in 1a, description in 1c and an essay on the topic in 1d all miss the demands of the command term. Underlining the command term before writing helps.

  • Vague terminology. “We asked some students some questions” is limited; “a semi-structured interview with an eight-question schedule and six participants recruited by opportunity sampling” is accurate and detailed.

  • Inventing a different practical. Answers must be about the practical actually carried out. Pretending to have done a more impressive study usually produces inconsistencies, and a real practical with modest results is perfectly adequate.

  • Forgetting ethics in 1a and 1d. Consent, withdrawal, anonymity and debriefing belong in the procedure, briefly.

  • Running out of time on 1c and 1d. They carry 6 marks each, more than 1a and 1b; plan time to match the marks.

Common mistake

Writing “the results are not generalisable because the sample was small” in every concept answer. A small sample is a real limitation, but on its own it is generic. Explain who the sample was (six students from one psychology class), why that matters for this method and topic (students who study psychology may describe stress in the language they have learned) and what it means for the conclusions.

Summary

  • Section A asks four questions on one class practical, named by its method: describe [4], explain a concept [4], compare and contrast [6] and design [6].

  • The focus is the research method, not the topic of the practical; background psychology earns nothing.

  • A practical record with aim, method and design, procedure, sampling technique and sample, findings and ethics, plus concept points and notes on other methods, prepares every answer.

  • A describe answer gives a precise detail for every methodological decision, using accurate terminology.

  • A concept answer explains the concept, then makes two or three links to decisions in the practical and explains their effect on the data.

  • A compare and contrast answer needs both similarities and differences, with both methods referred to throughout.

  • A design answer keeps the topic, changes the method, and specifies type, sample, tool, procedure, analysis and ethics.

  • The method × concept grid gives a starting point for all 24 combinations, which must then be grounded in the actual practical.

Self-check

  • To do:

    I can state the four Section A question types, their command terms and what each markband rewards.

  • To do:

    I have a complete record of each of my four class practicals, with numbers and findings learned.

  • To do:

    I can write a detailed describe answer for each of my practicals using accurate method terminology.

  • To do:

    I can explain any of the six concepts in relation to any of my practicals, with specific links.

  • To do:

    I can compare and contrast any two methods, giving both similarities and differences.

  • To do:

    I can design a study on the same topic as each practical using each of the other three methods.

  • To do:

    I can recognise and avoid generic points that could apply to any study.

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More IB Psychology notes

  • Paper 1: concept-based extended responseThe page before this.
  • Paper 2: evaluating an unseen studyThe next page.
  • Psychology assessmentEach Psychology paper, the internal assessment and grade boundaries.
  • IB PsychologyThe Psychology syllabus, how it is assessed and every notes page.

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