Experimental Design - Revision for OCR Component 1 PDF

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Revision for OCR Component 1...

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Experimental Designs

Independent measures design - involve using different participants for each condition of the experiment Repeated measures design - involves using the same participants in each condition of an experiment Matched pairs design - involves using different but similar participants in each condition

Independent Measures Design

Strengths  Order effects eliminated  Less demand characteristics

Repeated Measures Design

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Matched Pairs Design

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More economical Participant variables constant Cheaper and need less participants Less order effects Less demand characteristics Can control participant variables Less extraneous variables

Weaknesses  Participant variables differ  Extraneous variables  More participants needed  Less economical  Order effects  Demand characteristics

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Hard to match participants Less economical

Counterbalancing - alternating the order in which participants perform in different conditions of an experiment Order effects - when the order that we do conditions affects how well we perform on the study...