Exam 8: Causal Research Design: Experimentation

True experimental designs include the pretest-posttest control group design and the posttest-only control group design.

The one-group pretest-posttest design is a quasi-experimental design that involves periodic measurements on the dependent variable for the group of test units.

Field experiments feature which of the following?

A factorial design is a statistical experimental design used to measure the effects of two or more independent variables at various levels and to allow for interactions between variables.

According to the text, an experimental group is the group exposed to the manipulated independent variable.

A time series design that includes another group of test units to serve as a control group is called a multiple time series design.

In a short essay, list and discuss the three specific preexperimental designs.

A random sample of respondents would be distributed randomly, half to the experimental group and half to the control group. A pretest questionnaire would be administered to the respondents in both groups to obtain a measurement on attitudes toward Pepsi advertising, brand, and celebrity; only the respondents in the experimental group would be exposed to the TV program containing the Pepsi commercial. Then, a questionnaire would be administered to respondents in both groups to obtain posttest measures on attitudes toward Pepsi advertising, brand, and celebrity. Which of the following experimental design best represents the above scenario?

In a short essay, define internal validity and external validity and discuss the difference between each type of validity.

Experimental design is the set of experimental procedures specifying the test units and sampling procedures and all of the following EXCEPT:

________ refers to whether the manipulation of the independent variables or treatments actually caused the observed effects on the dependent variables.

Variables, other than the independent variables, that influence the response of the test units are called extraneous variables.

Limitations of experiments include which of the following?

A preexperimental design in which a single group of test units is exposed to a treatment X and then a single measurement on the dependent variable is taken is called ________.

Consumers are good examples of dependent variables.

Variables that measure the effect of the independent variables on the test units are called dependent variables.

________ is an application of a controlled experiment done in limited, but carefully selected, test markets.

In a short essay, define randomization and list and discuss the two types of true experimental design.

External validity refers to whether the manipulation of the independent variables or treatments actually caused the observed effects on the dependent variables.

Preexperimental designs are distinguished by the fact that the researcher can randomly assign test units to experimental groups and also randomly assign treatments to experimental groups.