In an experiment on the effects of level of motivation on the performance of typists,the researcher randomly assigned one third of her subjects to each of three levels of motivation (and then induced different levels of motivation in the three groups).She measured the average words typed per minute by each group,and found that performance was highest under medium motivation,average under low motivation,and worst under high motivation.The regular variation in performance (average,best,worst)as motivation was changed (low,medium,high)is called a(n):
A)linear relationship.
B)data pattern.
C)independent variable.
D)functional relationship.

Question

Quizplus · Accepted Answer

The regular variation in performance as motivation was changed indicates a functional relationship between the two variables. A functional relationship means that as one variable (independent variable) changes, the other variable (dependent variable) changes in a consistent and predictable manner. Therefore, the correct choice is D) functional relationship. Choices A and B are incorrect because they do not accurately describe the relationship between the two variables, and choice C is incorrect because motivation is the independent variable, not the dependent variable.

In an Experiment on the Effects of Level of Motivation