A study using the experimental design has found that in conditions in which there are more people in a room, the average reaction time to respond to a request for help is less. In this experiment the independent variable is____________ and the dependent variable is_______________.
A) the number of people in the room; the gender of the participants
B) the gender of the participants; the number of people in the room.
C) reaction time to help; number of people in the room
D) the number of people in the room; reaction time to help

Question

Quizplus · Accepted Answer

In experimental designs, the independent variable is what the researcher manipulates or changes, and the dependent variable is what is being measured. In this study, the number of people in the room is manipulated to see its effect on the reaction time to help, making the number of people the independent variable and the reaction time the dependent variable.

A Study Using the Experimental Design Has Found That in Conditions