Guide for IB Psychology IA Design Section
This guide covers important aspects of designing an IB Psychology IA, including participants, procedures, design types, controlling participant variability and order effects, independent and dependent variables, and ethics considerations.
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Presentation Transcript
Design A guide for the IB Psychology IA design section Participants Who? Procedure What? Design How?
Design Independent measures / samples (between subjects) or Repeated measures (within subjects)?
Design Independent measures No order effects Can use single blind design Repeated measures Fewer participants needed Less participant variability X Intra- and inter- group variability in participants X Need more participants than in repeated measures design X Order effects can change participants behaviour X Fatigue can change participants behaviour
To Control Participant Variability Random allocation to groups Matched pairs allocation to groups
To Control Order Effects Counterbalancing (alternate numbers) Participant Condition 1 Condition 2 1 First Second 2 Second First 3 First Second 4 Second First 5 First Second 6 Second First 7 First Second 8 Second First 9 First Second 10 Second First
Independent and Dependent Variables The IV is manipulated and the DV is measured under two conditions. IV DV Group/Cond 1 Manipulated Group/Cond 2
Ethics Note how you met the ethical guidelines by having informed sheet, a standardized instruction sheet and a debriefing sheet, all of which informed participants of the procedure and their rights to withdraw themselves and their data at any time. an consent
