In an experiment examining the effects of size of plate on amount of food eaten,one group of participants is measured after eating food on 12-inch plates.Another group of participants is measured after eating food on 10-inch plates.This is an example of a ____ design.
A)single-subjects
B)between-subjects
C)within-subjects
D)matched groups

Question

In an experiment examining the effects of size of plate on amount of food eaten,one group of participants is measured after eating food on 12-inch plates.Another group of participants is measured after eating food on 10-inch plates.This is an example of a ____ design.​
A)​single-subjects
B)​between-subjects
C)within-subjects
D)​matched groups

Quizplus · Accepted Answer

The experiment involves comparing two groups of participants who were assigned to different plate sizes, therefore it is a between-subjects design. A single-subjects design would involve measuring the same participants under both conditions (i.e. having them eat on both 10-inch and 12-inch plates). A within-subjects design would involve measuring all participants under both conditions. A matched groups design would involve matching participants in the two groups based on relevant characteristics (e.g. age, gender, weight) to control for individual differences before assigning them to different plate sizes.

In an Experiment Examining the Effects of Size of Plate