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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
"John Crane provides an invaluable resource for all IB Psychology teachers. The site provides up to date studies and relevant material in the current news. It has become my go-to source for IB specific materials."
Graham Samson
Exeter College
Subscriber comments
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Hey John, Thank you for all your help. I'm just confused because EE samples on Clastify and elsewhere show a detailed explanation of methodology. However, your sample and the rubric don't require that. Should I ask students to remove that heading...
Supervision of EE -
Thanks Laura, but I am now confused about the amount of information. In your P1A samples for Neurotransmission and for SIT, 'Sample 1' of each gets 3/4. In both cases, the comment is that the explanation is too basic or could...
P1A: Chemical messengers -
Thank you for this helpful page. I really like the idea of introducing the non-experimental research methods gradually, alongside each practical and then answering Questions 3 and 4. Having not so long ago finished experimental research...
Planning the practicals
Katie
Hi John, Is Purposive sampling still consdiered a sampling technique in and of itself? Best wishes, Katie
Sampling techniques