1. The kind of experiment that can be likened to turning a light switch on and off is a(n) ……………………………………. design 2. ……………………………………. design experiments assume that there are no important differences...

1. The kind of experiment that can be likened to turning a light switch on and off is a(n) ……………………………………. design

2. ……………………………………. design experiments assume that there are no important differences among participants.