Class notes
Natural-groups designs-notesPsyc2127ch8
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- Dalhousie University (Dal )
Natural-groups designs-notesPsyc2127ch8
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Natural-groups designs● Rather than manipulate IV, different groups of
participants based on naturally occurring
attributes called subject variables are created
(e.g., age, gender, personality).
● Is the natural-groups design an experiment?
What argument supports your response?
ADVANTAGES OF WITHIN-SUBJECTS DESIGNS (REPEATED
MEASURES DESIGNS)
Need fewer participants
●
Can collect more data per condition
●
Required to investigate certain research questions
●
Create more equivalent groups at experiment onset
●
DISADVANTAGES OF WITHIN-SUBJECTS DESIGNS
Order effects
●
● Greater likelihood that participants will become
aware of experiment’s purpose
● Cannot accommodate all research questions
● Order/sequence effects occur when participants
are affected by the order in which they encounter
conditions
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