PSYCH 240 Study Guide - Midterm Guide: Mental Chronometry, Franciscus Donders, B. F. Skinner
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Dependent variables: what you measure/ analyze; observable result of experiment ex) reaction time, accuracy, brain activity. Independent variables: what you manipulate ex) number of items to be memorized, amount of alcohol ingested, passage of time sometimes you don"t manipulate the independent variable itself, but you use a naturally occurring manipulation. For example, if you"re interested in gender differences in memory then you might perform your memory test on both men and women and then compare memory performance of the men with that of the women. Main effects and interactions: independent variable (on the x axis) definitely influenced the dependent variable (on the y axis). A main effect refers to a situation in changes in the independent variable lead to changes in the dependent variable. Interaction: two or more independent variables interact when the effect of one independent variable is different depending on the level of the other independent variable; effect one independent variable has depends on value of the other.
