Psychology 9990/42 February/March 2026: question paper and mark scheme
Cambridge AS & A Level Psychology (9990), Paper 4 Specialist Options: Application and Research Methods, February/March 2026. Read both free below, or download them. Done the paper? Get it marked by AI against this mark scheme.
10(b)(i) Describe this psychological knowledge. 4
Syllabus: 2.3.1 Consumer decision-making. strategies of consumer decision-
making focusing on explanations and examples of compensatory, non-
compensatory and partially compensatory strategies including explanations
and examples of each.
Answers are likely to include (other appropriate responses to be credited):
Study by Jedetski (2002) outlines compensatory decision strategies: an
attractive or high value on one attribute can compensate for an unattractive or
low value on another attribute. For example, attractive attributes (e.g. of coat
quality) can compensate for unattractive attributes (e.g. high coat cost).
non-compensatory decision strategies: consumers making choices
consider attributes sequentially, and benefits on some attributes may not
overbalance shortfalls on others. Three strategies apply:
• lexicographic: if the first coat has high value attributes, there is no reason
to look further.
• satisficing: we select the first option that appears to meet the need (see
above).
• elimination by aspects: sets a cut-off value and any coat not meeting the
desired value is eliminated.
Partially compensatory strategies combine aspects of the above models.
Note: do not allow del Campo et al who looked at choice heuristics
(recognition versus ‘take-the-best’).
Marks Description
3–4 The knowledge is appropriate. Relevant points are correctly
described in good detail.
1–2 Basic points are identified with some elaboration and
understanding. The answer lacks detail (a sentence or two).
0 No creditable response
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10(b)(ii) Explain how you used two features of this psychological knowledge to 4
plan your experiment.
Candidates should explain how the psychological knowledge described in
(b)(i) has informed their plan in part (a).
For each feature:
Marks Description
2 Suitable answer that relates a feature and explains how the
feature was used, expanded or modified to make it appropriate
to the plan. The knowledge has clearly been applied to the
plan.
1 Basic answer that identifies a feature
0 No creditable response
Note: 1 mark for explanation of follow on from (b)i; 1 mark for
explanation appearing in (a) ×2
Example: questionnaire (on which strategy) so questions should be about (i)
compensatory and (ii) non-compensatory strategies (as outlined in (b)(i)).
Also, can include strategies of satisficing, elimination by aspects or
lexicographic.
10(c)(i) Explain one reason for your choice of question format. 2
Candidates must use the question format stated in (a)
Award 2 marks: reason is given and applied to the plan
Award 1 mark: reason is given without being applied to the plan
Example:
open questions:
• the data gathered may be ‘rich’ and detailed (1 mark) related to plan (2
marks)
• it allows participants the opportunity to express a range of feelings and
explain their behaviour (1 mark) related to plan (2 marks)
closed questions:
• answers are in the same format for all participants (1 mark) related to
plan (2 marks)
• answers may be easy to score/analyse (1 mark) related to plan (2 marks)
• relatively large numbers of participants can be questioned relatively
quickly (1 mark) related to plan (2 marks) both closed and open:
open and closed are used to gather both qualitative and quantitative data (1
mark) related to plan (2 marks)
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10(c)(ii) Explain one weakness of using an online questionnaire in your study. 2
Candidates must use the online questionnaire stated in (a).
Award 2 marks: weakness is given and applied to the plan
Award 1 mark: weakness is given without being applied to the plan
Example
• online means that the participant is perhaps more likely to drop-out
without completing the questionnaire (right to withdraw) (1 mark) related
to plan (2 marks).
• online questionnaires can only be completed by those who have access
to a computer/the internet which might restrict the representativeness of
the sample (1 mark) related to study (2 marks)
10(c)(iii) Explain one reason for your choice of sample of participants. 2
Candidates must use the sample stated in (a).
Award 2 marks: reason is given and applied to the plan
Award 1 mark: reason is given without being applied to the plan
Example:
• the number of participants in my study was X because (reason given)
(1 mark) and related (2 marks)
• the sex/gender balance of participants in my study was X because
(reason given) (1 mark) and related (2 marks)
• the location participants were chosen from in my study was because
(reason given) (1 mark) and related (2 marks)
• the type of participants chosen to be in my study was because (reason
given) (1 mark) and related (2 marks)
• the age range of participants chosen to be in my study was because
(reason given) (1 mark) and related (2 marks)
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Section B
11(a) Plan a study using a controlled observation to investigate the 10
effectiveness of mirror treatment for phantom limb pain.
Your plan must include details about:
• location of the study
• behavioural categories.
AO2
Use Table A: AO2 Application to mark candidate responses to this question.
Credit both general features and specific features of the plan.
The specific features of the plan The general features of the plan
should include: should include (if appropriate):
• structured or unstructured • sample and sampling
• covert or overt technique
• controlled or naturalistic • ethical guidelines
• participant or non-participant • a procedure
• number of observers (inter- • the location
rater reliability) • type of data, analysis of data,
• behavioural categories use of descriptive statistics
• event or time sampling • an aim or hypothesis
(directional or non-
directional)/null hypothesis
• steps for making the study
valid and reliable
Credit other elements of the plan as appropriate using the marking grid.
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11(b) For one piece of psychological knowledge on which your plan is based:
11(b)(i) Describe this psychological knowledge. 4
AO2
Syllabus: 3.3.1 Types and theories of pain. functions of pain; types of pain:
acute and chronic pain. Focus on phantom limb pain and mirror treatment to
include a case study, e.g. MacLachlan et al. (2004).
Answers are likely to include (other appropriate responses to be credited):
Mirror treatment involves the use of a mirror box. The patient moves the good
limb and observes the reflection. As the patient sees the good hand/leg
moving it appears as if the phantom limb is also moving. If there is no pain in
the good limb, there is no pain in the phantom limb. Study by MacLachlan et
al. (2004) could be mentioned. Quote ‘We present the first case study of the
use of ‘mirror treatment’ in a person with a lower limb amputation who was
reporting PLP at the time of treatment. During the intervention there was a
significant reduction in his PLP, an increase in sense of motor control over the
phantom and a change in aspects of the phantom limb that was experienced.’
Marks Description
3–4 The knowledge is appropriate. Relevant points are correctly
described in good detail.
1–2 Basic points are identified with some elaboration and
understanding. The answer lacks detail (a sentence or two).
0 No creditable response
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11(b)(ii) Explain how you used two features of this psychological knowledge to 4
plan your study.
AO2
Candidates should explain how the psychological knowledge described in
(b)(i) has informed their plan in part (a).
For each feature:
Marks Description
2 Suitable answer that relates a feature and explains how the
feature was used, expanded or modified to make it appropriate
to the plan. The knowledge has clearly been applied to the
plan.
1 Basic answer that identifies a feature
0 No creditable response
Note: 1 mark for explanation of follow on from (b)i; 1 mark for
explanation appearing in (a) ×2
Example: (i) details of mirror treatment itself (ii) reference to study by
MacLachlan et al. Alternatively could include: Location of treatment: in
participant’s home or in laboratory? Behavioural/observational measures of
pain: (for example) a patient’s facial expressions ‘happy’/shows some
discomfort/pain (grimaces).
11(c)(i) Explain one reason for your choice of location for the study. 2
AO2
Candidates must use the location stated in (a).
Award 2 marks: reason is given and applied to the plan
Award 1 mark: reason is given without being applied to the plan
Example
• location of a laboratory or hospital room because the environment can be
controlled for the observation (1 mark) related to study (2 marks)
• location of a home because this is where the person will be when
practising treatment and it is natural for the participant (1 mark) related to
study (2 marks)
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11(c)(ii) Explain one weakness with your choice of location. 2
AO3
Candidates must use the location stated in (c)(i)
Award 2 marks: weakness is given and applied to the plan
Award 1 mark: weakness is given without being applied to the plan
Example:
• participants in a laboratory or hospital room are not in their natural
environment (1 mark) and so will not be as relaxed or comfortable as
following the procedure as they would in their own home (1 mark) related
to study (2 marks)
• participants being at home means that any study will be more difficult to
set up especially if it is a covert observation (1 mark) and so any data
gathered about the procedure might be less valid (2 marks)
11(c)(iii) Explain one reason for using behavioural categories in your study. 2
AO2
Candidates should use the choice of behavioural categories stated in (a).
Award 2 marks if an appropriate reason is given and justified.
Award 1 mark if an appropriate reason is given but not justified.
Example:
• behavioural categories were used because they could be agreed and
defined before the observation started (1 mark) related to plan (2 marks).
• behavioural categories were used because each observer would know
exactly what they were looking for, reducing ambiguity and increasing
inter-rater reliability (1 mark) related to plan (2 marks).
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Section B
12(a) Plan a study using a semi-structured interview to investigate which type 10
of bullying is most common in a food factory.
Your plan must include details about:
• question format
• analysis of data.
Use Table A: AO2 Application to mark candidate responses to this question.
Credit both general features and specific features of the plan.
The specific features of the plan The general features of the plan
should include: should include (if appropriate):
• interview technique (telephone • sample and sampling
or face-to-face) technique
• interview format (structured, • ethical guidelines
unstructured, semi-structured). • a procedure
• question format (open • the location
and/or closed) • type(s) of data, analysis of
• examples of questions data, use of descriptive
• question scoring/interpretation statistics
• number of questions • an aim or hypothesis
(directional or non-directional)/
null hypothesis
• steps for making the study
valid and reliable
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12(b) For one piece of psychological knowledge on which your plan is based:
12(b)(i) Describe this psychological knowledge. 4
Syllabus: 4.3.3 Conflict at work. bullying at work; types, phases and causes,
including a study, e.g. Einarsen (1999).
Answers are likely to include (other appropriate responses to be credited):
Einarsen (1999) believes there are five types of bullying behaviour at work:
• work-related bullying which may involve a change of work tasks or
making them difficult to perform.
• social isolation.
• personal attacks (or attacks on private life) by ridicule, insulting remarks,
or gossip.
• verbal threats including criticism, being yelled at or humiliated in public.
• physical violence (or threats of violence).
• ‘Among 137 Norwegian victims of bullying and harassment at work, social
isolation and exclusion, devaluation of one's work and efforts, and
exposure to teasing, insulting remarks and ridicule, were the most
common’.
Note: Question is types NOT causes or phases.
Marks Description
3–4 The knowledge is appropriate. Relevant points are correctly
described in good detail.
1–2 Basic points are identified with some elaboration and
understanding. The answer lacks detail (a sentence or two).
0 No creditable response
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12(b)(ii) Explain how you used two features of this psychological knowledge to 4
plan your study.
Candidates should explain how the psychological knowledge described in
(b)(i) has informed their plan in part (a). For each feature:
Marks Description
2 Suitable answer that relates a feature and explains how the
feature was used, expanded or modified to make it appropriate
to the plan. The knowledge has clearly been applied to the
plan.
1 Basic answer that identifies a feature
0 No creditable response
Note: 1 mark for explanation of follow on from (b)(i); 1 mark for
explanation appearing in (a) ×2
Example: Question is ‘which type of bullying’ so should include at least two
types Choose from: (i) work-related (ii) social isolation OR verbal threat OR
physical threat (including all five types will not be penalised). Questions for
interview based on knowledge of these types.
12(c)(i) Explain one reason for your choice of question format. 2
Candidates must use the question format stated in (a).
Award 2 marks: reason is given and applied to the plan
Award 1 mark: reason is given without being applied to the plan
Example:
open questions:
• the data gathered may be ‘rich’ and detailed (1 mark) related to plan (2
marks)
• it allows participants the opportunity to express a range of feelings and
explain their behaviour (1 mark) related to plan (2 marks)
closed questions:
• answers are in the same format for all participants (1 mark) related to
plan (2 marks)
• answers may be easy to score/analyse (1 mark) related to plan (2 marks)
• relatively large numbers of participants can be questioned relatively
quickly (1 mark) related to plan (2 marks)
both closed and open:
• open and closed are used to gather both qualitative and quantitative data
(1 mark) related to plan (2 marks)
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12(c)(ii) Explain one weakness with your choice of question format. 2
Candidates must use the question format stated in (c)(i)
Award 2 marks: weakness is given and applied to the plan
Award 1 mark: weakness is given without being applied to the plan
Open questions:
• participants may not wish to express a range of feelings or explain their
behaviour (1 mark) particularly if they feel that they have been tricked by
the disrupt then reframe sales technique (2 marks).
• Answers may be more difficult to analyse because it is quantitative data
with no scale/fixed answers (1 mark) related to plan (2 marks)
Closed questions:
• participants have no opportunity to express a range of feelings or explain
their behaviour stating ‘yes’ for example, does not allow participants to
explain how they feel (1 mark) about disrupt then reframe bring used on
them (2 marks)
• participants can only respond with the answer options they have which
might be forced (4-point scale) or limited (5-point scale) (1 mark) related
to plan (2 marks)
Both open and closed:
• longer data analysis (e.g. recording and categorising open answers; use
of judges/raters?) (1 mark) related to plan (2 marks)
12(c)(iii) Explain one reason for the way you chose to analyse your data. 2
Candidates must use the analysis of data stated in (a).
Award 2 marks: reason is given and applied to the plan
Award 1 mark: reason is given without being applied to the plan
• as the data gathered is quantitative, the data can be analysed using
descriptive statistics such as mean, median and mode (or scatter graph
for correlation) (1 mark) related to study (2 marks)
• as the data gathered is qualitative, the data gathered can be presented to
raters/judges who will independently categorise the words so conclusions
can be drawn from the data (1 mark) related to study (2 marks)
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