Exam 8: Experimental Designs: Between-Subjects Design

A between-subjects experiment comparing four treatment conditions produces 20 scores in each treatment condition. How many scores were obtained for each participant?

A disadvantage of holding a variable constant is that it limits an experiment's external validity.

Why is random assignment used in between-subjects experimental designs?

An advantage of between-subjects designs is that they require fewer participants than are typically needed for within-subjects designs.

Describe the advantages and disadvantages of matching groups of participants in a between-subjects experiment.

An experiment that uses a different group of participants for each treatment condition is called a ____ design.

What is the most common statistical analysis for a single-factor two-group design?

A limitation of a single-factor multiple group design is that the ____.

The single-factor two-group design includes ____.

Holding a participant variable constant has the double advantage of (1) preventing the variable from becoming a confounding variable and (2) reducing variance within groups.

Increasing variance within groups ____ the likelihood of finding a difference between the treatment conditions.

Describe some of the problems that can develop if participants from different treatment conditions have an opportunity to talk with each other during the course of the experiment.

In a between-subjects design, large individual differences can produce ____.

What is the most common statistical analysis for a single-factor multiple-group design?

Standardizing procedures, standardizing treatment settings, and limiting individual differences all have the effect of ____.

Which risk to a study exists whether or not participants in different groups are able to communicate with each other?

Describe the basic characteristics of a between-subjects experiment.

Limiting individual differences is a way to ____.

Random assignment guarantees that participant characteristics do not become a confounding variable.

Differential attrition refers to ____.