CIE AS Psychology 9990: Research Methods
Complete revision guide for Cambridge International AS Level Psychology (9990) Paper 2: Research Methods. For exams 2026–2030.
This 23-page pack covers the whole of the CIE/CAIE 9990 research methodology specification, written to match the syllabus wording and structured around how Paper 2 is actually assessed.
The six research methods: experiments (laboratory and field, independent measures, repeated measures, matched pairs, counterbalancing, random allocation, order effects), self-reports (questionnaires and interviews, open and closed questions), case studies, observations (overt/covert, participant/non-participant, structured/unstructured, naturalistic/controlled), correlations, and longitudinal studies. Each with main features, a strengths-and-weaknesses table, links to the core studies that used it, and guidance on applying it to an unseen scenario.
Methodological concepts: aims and hypotheses (null, alternative, directional, non-directional); independent and dependent variables and operationalisation; controlling participant and situational variables; quantitative, qualitative, subjective and objective data; sampling and populations (opportunity, random, volunteer); ethical guidelines for human participants and for animals; validity including ecological validity; reliability (inter-rater, inter-observer, test-retest) and replicability.
Data analysis: tables, measures of central tendency, range and standard deviation, bar charts, histograms and scatter graphs — including what candidates are not required to do.
Section B planning: the general features required in every plan, a separate checklist for each research method and what to evaluate.
Also included: a table mapping all 12 core studies to their research methods and techniques, for the Section A questions that ask about methods within a named study, plus a full revision checklist.
Paper 2 is 50% application (AO2), so every section ends with applied guidance rather than stopping at definitions. Suitable for classroom teaching, revision lessons, cover work, tutoring and independent study.
File types: Word (.docx) and PDF (.pdf). The Word version is fully editable so you can adapt it for your own classes.
Pairs with our CIE AS Psychology 9990 core studies pack to cover the complete AS Level.




