Exam 12: Experimental Research: Weak and Strong Designs

A researcher carries out a study of memory strategies. She has all participants get three different memory strategies to use to learn lists of 20 words. She discovers that after she gives participants Strategy A to use, they have difficulty using strategies B and C. The problem of Strategy A influencing Strategy B and C performance suggests that one problem with the study is:

What is the best technique to use to control for sequencing effects?

One threat to the internal validity of the one-group posttest-only design is:

The variable that the researcher manipulates in an experiment is called the:

Single-blind refers to:

One of the big advantages of a repeated-measures design is that:

Counterbalancing involves:

Use the following to answer questions The following table presents a set of cell means from a study that looks at the use of cooperative learning versus lecture in teaching science. The researcher believes that gender and type of teaching approach will interact. Below are the set of means from the study. The scores are from a mathematics test with a possible range from 0 to 100. -There is a main effect of Gender in this study.

Order effects result from the previous treatment influencing subsequent treatments.

The control group serves the function of:

Matching involves ensuring that groups are similar on variables correlated with the dependent variable.

Which of the following is an example of "type technique" of variation of the independent variable?

What is the important difference between the posttest-only control-group design and the posttest-only design with nonequivalent groups?

Describe how experiments provide evidence of causality.

The posttest-only design with nonequivalent groups is likely to control for which of the following threats to internal validity:

Analysis of covariance is:

The variable that is influenced by a treatment is known as the:

Use the following to answer questions The following table presents a set of cell means from a study that looks at the use of cooperative learning versus lecture in teaching science. The researcher believes that gender and type of teaching approach will interact. Below are the set of means from the study. The scores are from a mathematics test with a possible range from 0 to 100. -There is a main effect of Instructional Type.

At least one of the "weak experimental designs" has random assignment to the groups.

If a study has been conducted in a controlled setting where all or nearly all extraneous variables are controlled, we have conducted a(n) __________ experiment.