Exam 13: Quasi Experiments

We ran an experiment with 10 men and 10 women that investigated whether the color of the paper red/white) that someone was copy-typing from or the color of the computer screen red/white) that someone was typing onto made any difference in typing speed. Everyone typed on all colors of paper with all colors of screens. We hypothesized that men would be affected by the color of the screen, but not by the color of the paper. Is the experimental design within-subjects, between-subjects, or mixed? What is are) the independent variables)? The dependant variables)? Is the design a true experiment, single-subject experiment, or a quasi-experiment? What are the conditions of the experiment?

A child psychologist believes that the level of aggressive behavior of 3- to 5-year-old children is strongly influenced by the types of toys available to play with. To test her hypothesis, she arranges with a local preschool to run the following experiment: For one week, the children will be able to play with all the toys normally available at the school. Then, all war-like toys toy soldiers, tanks, guns, etc.) will be removed for a week. In the third week, the war-like toys will be reintroduced, and in the fourth week removed again. During each week, the psychologist will observe the children's level of aggressive behavior. What type of quasi experimental design is illustrated in this example?

A documentary film director made a series of films about the lives of a set of children when they were 7, 14, 21, 28, and 35 years of age, i.e, the films 7-Up and 14-Up... What type of research design is this?

The results of a quasi experimental design involving non-equivalent control groups with pretests and posttests

Everyone born in 1990 would be considered part of the 1990

The presence of uncontrolled variables in a quasi experiment

If X = experimental treatment and O = pretest or posttest observation, then "O O O O X O O O" represents the _____ design.

Which of the following is NOT a step in conducting a program evaluation?

Longitudinal studies have the theoretical problem that

Effect size is compared across different studies by

The most common quasi experimental design is the ______ design.

Which of the following is the first step in conducting a program evaluation?

A danger in labeling a pre-existing groups as though they were independent variables is

If an experiment compared preexisting classes of students, the two classes would be called

If X = experimental treatment and O = pretest or posttest observation, then "O X O X O X O" represents the _____ design.

A teacher is interested in the effects of the use of programmed learning materials as supplementary aids in an advanced foreign language course. She is interested in the amount of foreign language vocabulary learned during one college semester. There are 92 students enrolled in four advanced French classes who are taught by this teacher. These students make up the subjects for the experiment. Two of the classes of students have access to the programmed learning material and the other two classes do not. Discuss an experimental design that would be appropriate for this situation. Is it necessary that the instructor use a pretest? Consider the matter of control. What procedures would be necessary for adequate internal validity? Comment on the external validity of this experiment.

Whether quasi experiments with pretest and posttest designs can be interpreted depends on

A time series design may be considered a

An evaluation listing how to improve a program while it is ongoing is called a

Barak and colleagues 2008) reviewed many studies of the efficacy of internet-based psychotherapy and concluded that it was generally effective. Their technique is called