In an Experiment Examining the Effects of Background Noise on People's

Multiple Choice

In an experiment examining the effects of background noise on people's ability to understand a verbal message, one group of participants is given a comprehension quiz after listening to a passage being read to them with no background noise. A week later, the same group of participants is given a comprehension quiz after listening to a passage being read to them with 60 decibels of conversation as background noise. This is an example of a ____ design.

A) single-subjects
B) between-subjects
C) within-subjects
D) matched groups