Exam 8: Experimental Design

_____ is a process for controlling order effects with all possible order conditions.

A confounding variable is problematic for an experimental design because it:

Nada designs a study in which she has two control and two experimental groups.In the design,one control group and one experimental group receive a pretest each,while the other control group and experimental group do not.Nada's design is an example of a _____ design.

Failure to control some extraneous variables is likely to result in a(n)_____ variable.

Wendy wants to know if a new sports drink improves physical performance.The number of push-ups each participant can complete in one minute is recorded first.The participants are then given eight ounces of the sports drink,and the number of push-ups completed in one minute is recorded again.Wendy finds that the number of push-ups completed is less after consuming the new sports drink.This finding is likely the result of a _____ effect.