Exam 8: Experimental Design II: Factorial Designs

All of the following are true about factorial designs except

The next questions refer to the following experiment: A researcher studied the influence of crowding (low, medium, and high crowding) on reading comprehension between two types of third graders. Half the children randomly assigned to each crowding condition were classified as “good” and half “poor” on an assessment of verbal fluency. In the study, each child read a 750-word passage and was tested on it later. -This is a _______ design.

If a study is a P x E factorial design, it could also be a

The next questions refer to the following experiment: A researcher simultaneously investigated learning style and teaching style. Students were identified as either visual/concrete learners or verbal/abstract learners, on the basis of a learning style survey. For each type of student, half were taught a statistics lesson using a computer program that included a lot of graphics, while the other half used a computer program with fewer graphics and more verbal material. After working through the program, all students were given a test on statistics. -This study includes learning style as

A 2x2x4 factorial design

Distinguish between a mixed factorial design and a P x E factorial design and explain why the latter reflects the spirit of Lewin's beliefs about how to best understand behavior.

In a stylus maze study, some subjects are shocked for errors and others are not shocked. Also, some are told they'll earn $10 if they learn the maze in 5 trials and others are told they'll earn $100. The results are that whether or not shock was present had no effect on behavior, but those who could earn $100 learned faster than those earning just $10. This result is most clearly an example of

In a study of cognitive mapping, all subjects point as accurately as they can to six different geographical targets. Half the subjects are aided by being told where true North is. The remaining subjects are not given the North orientation. Which of the following is true about this design?

In a study that produces both a main effect and an interaction, why is it important to interpret the interaction first?

In the above study, suppose that 10 subjects are tested in condition represented by the upper left hand cell of the factorial matrix. How many subjects need to be recruited to complete the study?

Following a statistically significant interaction in a 2x2 factorial, the next step, statistically, is to do an analysis of __________.

The next questions refer to the following experiment: A researcher investigated the effect of a child's attractiveness and gender on judgments of personality and intelligence. Male teachers were shown photos of children to obtain their "first impressions" of children. Each teacher was shown four photos (the order was randomized for each teacher): an attractive boy, an unattractive boy, an attractive girl, and an unattractive girl. The teachers rated the apparent friendliness of the child and also estimated the child's intelligence. -How would you describe the design of this study?

In a single experiment, amount of reward and type of reward are varied. Subjects are randomly assigned to one of three "amount of reward" groups. Each subject is tested once with one type of reward and once again with a second type of reward. What type of design is this?

A 3x3x3 factorial design has three

For which of the following within-subjects factors will counterbalancing not be involved?

A factorial design using both a between-subjects factor and a within-subjects factor is known as a(n) _______ design.

Describe the defining features of a factorial design and explain its unique advantage over designs that have a single independent variable.

A PxE design, common in educational research, that uses some type of student aptitude as the subject variable, is known as a(n) ______ design.

In a 3x3 factorial design, how many different F ratios will be calculated in the ANOVA?

Fisher thought that factorial designs were especially useful in agriculture, because the best crop yields might result from combinations of various factors. That is, Fisher saw that the advantage of factorials lies in their ability to uncover