1. In an experiment, an interaction can be obtained only when
a.the experiment involves more than one independent variable.
b.the experiment involves more than one dependent variable.
c.the experiment confounds either two independent variables or two psychological processes.
d.the results depend upon the combination of the dependent variables.
2. For which of the following situations would a within-subjects design be the most appropriate design?
a.we want to know whether training rats to learn one maze will aid learning a second, different maze
b.we want to know whether rats prefer a solution sweetened with sugar more than a solution sweetened with saccharin
c.we want to know whether a particular brain lesion will affect a rats preference for a sweet solution
d.we want to know whether ingesting alcohol will increase rats preference for an alcoholic drink over a non-alcoholic drink