A-LevelPsychologyResearch methods9990/21 · May/June 2021 · Q35 Marks

State what is meant by a 'case study'.

(a)State what is meant by a 'case study'.[2]
(b)One type of colour blindness is when people cannot tell the difference between the colours red and green. Describe how a case study to investigate colour blindness could be conducted.[3]

Mark scheme

Marking points from the official mark scheme (May/June 2021). The mark or mark type is shown in brackets.

[2] 1 mark for each (of two) descriptive points (definitive)
one instance/one person/one individual/one unit;
in detail/depth/descriptive/(lots of) qualitative data;
[3] 3 marks for three points on how to conduct the study
1 point must be directly linked to earn full 3 marks
Use volunteer sampling to obtain a colour blind person; (link)
advertise for colour blind people online; (link)
Conduct interviews; (generic)
to ask detailed questions about their past, e.g. how they found out that sensory experience was different; (link)
Present them with coloured stimuli and ask them what they see; (link)
Make observations; (generic)
e.g. see what colour they say when see they red/green objects around them; (link)

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Topic: Research methods, A-Level Psychology (syllabus 9990). Structured question, 5 marks.
Source: A-Level Psychology, May/June 2021 Paper 2 Variant 1, question 3.

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