PSYCH291 Lecture Notes - Dependent And Independent Variables, Internal Validity, Psychology Today
24 Mar 2013
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*things that jeopardize our ability to conclude that x caused y. *things that jeopardize our ability to draw conclusions abt causality. *things other than the predictor variable that may had lead to effect. *a factor other than x that may have caused y. *two issues in correlational designs that threaten validity: *typical correlational design: use continuous measures to measure both the predictor and dependent variables. *continuous ranked order from low to high. *typically, continuous measures used for both the predictor and dependent variables. *one group pre-test post-test design pre test- exposed to x- get a pre-test - *static groups design compare two groups, one group gets the x, one grou has examine single group not. *two different ways of looking for the effects of x. *before an x occurs and after an x occurs. *want to conclude that the difference from before to after is due to x. *but could it be something other than x? (threats to internal validity)
