PSYC 201W Chapter 9: PSYC 201 Chapter 9

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Factorial design - includes 2/more independent variables & crosses every level of each. Iv w/ every level of all other ivs. Dahl & price were interested in how 2 factors - age of alibi witness & r/s b/w alibi witness. & crime suspect - influenced ppl"s acceptance of an alibi. Studied issue experimentally by stimulating police investigation during which they exposed participants to diff alibi witnesses. Wanted to compare ppl"s reactions to both child & adult alibi witnesses. Predicted that ppl more likely to believe child alibi witness than adult alibi witness. Also wanted to examine how alibi"s witness" age & r/s to crime suspect jointly influenced ppl"s willingness to believe an alibi. Combining 2 ivs which each have 2 levels creates experimental design w/ 4 conditions. Fact that 2 numbers involved tells us there are 2 independent variables. Multiplying number of levels of 2 ivs informs us that there are 4 conditions in experiment.

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