Author Question: Random assignment of participants to groups helps reduce A) attrition. B) regression to the ... (Read 59 times)

mp14 · **on:** Aug 4, 2018

Random assignment of participants to groups helps reduce

A) attrition.
B) regression to the mean.
C) threats to internal validity from attrition and regression to the mean.
D) threats to construct validity.

Question 2

Including proper control groups helps to

A) control experimenter effects.
B) randomize the effects of the dependent variable.
C) eliminate confounding due to subject effects.
D) control history, maturation, and regression to the mean.