Marcus is interested in examining whether attending preschool makes children more extraverted. In designing a study to examine this relationship, which of the following would NOT be a potential extraneous variables?
A) the personalities of participants' classmates
B) the age at which one starts school
C) the personalities of participants' parents
D) whether the participant attends preschool

Question

Quizplus · Accepted Answer

Whether the participant attends preschool is the independent variable we are interested in and not an extraneous variable. Extraneous variables are variables that are not being studied but can affect the results of the study. The personalities of participants' classmates, the age at which one starts school, and the personalities of participants' parents could all potentially affect the results and are therefore extraneous variables.

Marcus Is Interested in Examining Whether Attending Preschool Makes Children