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.What was the independent variable in this experiment?
A)motivation
B)typing speed
C)variation in typing speed
D)manipulation of typing speed

Question

Quizplus · Accepted Answer

The independent variable in this experiment is the level of motivation, as it was purposely manipulated by the researcher and was the factor being studied for its effects on typing speed. The typing speed is the dependent variable, as it was measured to see how it varied based on the level of motivation. The variation in typing speed refers to the differences between the three groups, but it is not the independent variable being studied or manipulated. The manipulation of typing speed is not a relevant factor in this experiment.

In an Experiment on the Effects of Level of Motivation