PSY 250 Lecture Notes - Lecture 56: Analysis Of Covariance, Covariate, Categorical Variable
Document Summary
Final- tuesday 9th @ 11:50 - 2 hours. Main effects and interactions are assessed on dv scores after the dv has been adjusted for by the dv"s relationship with one or more covariates (cvs) Covariate is a variable that is related to the dv, which you can"t manipulate, but you want to account for its relationship with the dv. Examining the effect of several different treatments for depression. Often people don"t enter the experiment with exactly the same levels of depression. The initial level of depression is something to control for. Examining the effect of a training program on math ability. Utilize a pretest math score as a covariate to control for where people started out. Presents a clearer picture of whether people do well on the final test due to the training or due to the math ability they had coming in. The chi-square test is used for nominal and ordinal data.
