1. The study in which William Verplanck reinforced opinions is an example of a(n) ……………………… or within-subject experiment. 2. The experiment in which pigeons pecked a banana hanging from the ceiling...

1. The study in which William Verplanck reinforced opinions is an example of a(n) ……………………… or within-subject experiment.

2. The experiment in which pigeons pecked a banana hanging from the ceiling demonstrated that insight is the product of the history of ……………………… .