Phillipe, a researcher, examined the effect of lighting on learning. Randomly assigned participants learned material while using a 100-watt or a 125-watt bulb. He found no differences between the two groups. The nonsignificant results may have occurred because of _____.
A)a costly measure of learning
B)insufficient strength of the manipulation
C)selection differences
D)the use of staged manipulation

Question

Quizplus · Accepted Answer

The nonsignificant results may have occurred because the manipulation of lighting (using a 100-watt or a 125-watt bulb) was not strong enough to produce a significant effect on learning.

Phillipe, a Researcher, Examined the Effect of Lighting on Learning