Author Question: A study designed with a pretest, a treatment, and a posttest A) has a built-in control group. B) ... (Read 51 times)

RRMR · **on:** Aug 4, 2018

A study designed with a pretest, a treatment, and a posttest

A) has a built-in control group.
B) compares a control group with an experimental group.
C) cannot control several confounding variables.
D) controls most sources of confounding.

Question 2

In an experiment, there must be

A) at least one level of the independent variable.
B) at least two levels of the independent variable.
C) at least two measures of the dependent variable.
D) not more than two levels of the dependent variable.