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14 Oct 2026
Research questions - IA and EE
What is the difference between an extended essay research question and an IA research question (RQ)? The first difference is that the IA proposal does not have to have an RQ; an aim is sufficient. But...
11 Oct 2026
Reflecting on P2B
In the second year of giving students practice Papers 2, Section B, I see they repeatedly make mistakes evaluating a study. These mistakes reflect more a misunderstanding of the goals of the assessment...
Recommendations
See all"An excellent resource which really supports my teaching. I particular have used the Paper 3 stimulus material - they have been a great resource especially the model answers."
Hilary Rowark
St. Christopher’s School
"This site is an invaluable resource. The DP Psychology curriculum can often be overwhelming for new teachers, but the InThinking site makes it much easier to approach for a first-timer. The 'teacher resources' pages contain numerous highly-engaging lesson..."
Warren King
YK Pao
Subscriber comments
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Dear John and Laura, Is combining sampling methods - such as purposive sampling (e.g., to screen for a formal ADHD diagnosis) and snowball sampling acceptable for a true experiment in Crit B? My student wants to recruit using...
Internal Assessment (teacher) -
Dear John, IS the following EE question too broad : To what extent is cognitive behavioral therapy effective in reducing symptoms of depression.
Choosing a question -
Hi John. I can't find either of the presentations (approving research proposals and ethics ratings) in this lesson plan in the Presentations section. It would save me (and I bet loads of other Psych teachers) a lot of time if there was a link beside...
Ethics in experiments
Maggie
Hi John, I noticed a possible issue with the sample answer about the ecological validity of Glanzer and Cunitz (1966). The answer mentions "both studies" and refers to using letters that do not sound similar and cannot form words. However, Glanzer...
The Multi-Store Model