Author Question: The ________ of a study refers to the degree to which the IV was the only reason for changes on the ... (Read 21 times)

karlynnae · **on:** Jun 20, 2018

The ________ of a study refers to the degree to which the IV was the only reason for changes on
the DV, i.e., were there extraneous or nuisance variables that disrupted the IV-DV relationship.

A) external validity B) diffusion of treatment
C) randomization D) internal validity

Question 2

You find that people who weigh more tend to have higher levels of cholesterol. You have found
that these two variables

A) are negatively correlated B) have equal levels of variability
C) are significantly different D) are positively correlated