Exam 8: Experimental Research Design

In a 4X2 factorial design there are______ cells.

Hannah wants to see if her new technique of ping-pong playing can decrease the time it takes to finish a ping-pong game. She asks the U.S. Olympic ping-pong team to work with her. Half of the U.S Olympic team is randomly assigned to be taught by the new style, the experimental group, and the other randomly assigned half are not, the control group. Her technique does not significantly decrease the time it takes the experimental group to finish a ping-pong game compared to the control group, perhaps because they are already so good at the sport. This could be an example of

The posttest-only control group design requires

An experiment was designed to determine if gender of the interviewer and the amount of eye contact by the interviewer will influence the participant’s liking of an interviewer. Thus participants were randomly assigned to groups that had either a male or female interviewer who made little, moderate, or sustained eye contact. At the end of the sessions, the participants were asked to rate their liking of the interviewer. -If the interaction between interviewer gender and duration of eye contact were significant,

Two teachers who are friends teach math at different high schools. At a conference, they learn about a new program for teaching trigonometry. They decide to test it by having one teacher use it in her class and the other use the traditional program, then compare their students' scores on the AP trigonometry test. This is an example of which experimental design?

Which of the following is NOT a benefit of incorporating a pretest into your experimental design?

An experiment was designed to determine if gender of the interviewer and the amount of eye contact by the interviewer will influence the participant’s liking of an interviewer. Thus participants were randomly assigned to groups that had either a male or female interviewer who made little, moderate, or sustained eye contact. At the end of the sessions, the participants were asked to rate their liking of the interviewer. -This is a________ design.

Which of the following is an advantage of within-participant designs over between- participant designs?

What is the major advantage of a within-participants design?

Two classes of students at different schools are closely matched on IQ scores. One class is being taught with the standard method and the other class is being taught with a new technique. The two classes are then to be compared on scores from a standardized test at the end of the year.

Use the following table to answer questions -The B₁ mean and B₂ mean represent the main effect of IV_B and can also be called__________ means.

The major fault in the non-equivalent posttest only design is that

Which of the following is NOT an advantage of a within-participants design?

Rhonda designs an experiment in which half of her participants are randomly assigned to view a sad movie and half view a comedy, but all participants fill out three mood surveys at one, two, and three weeks after the movie. This is an example of

There are many good reasons for pretesting participants before introducing the independent variable. Perhaps the most common of these is that pretesting

In a 4x2 factorial design, there are____ independent variables.

In a 4x2 factorial design, there are

The one-group posttest-only design includes all the following faults EXCEPT

A researcher predicts that tennis professionals will play better in front of an audience. Less capable tennis players, however, are expected to do better without an audience. The researcher

What is the important difference between the between-participants posttest-only design and the flawed non-equivalent posttest-only design?