Exam 8: Experimental Design II: Factorial Designs

Twenty poor comprehenders are tested in the low crowding condition. To keep the same N in all the cells, how many children will participate in the experiment?

With 25 students tested per cell of this design, how many students will be needed in all?

A 3x3x3 factorial design has

In a memory study using a 2x2 factorial, one of the factors is the presentation rate of the words, the two levels being 2 and 4 seconds per item. The researcher finds that recall is 98% accurate at 2 seconds per item and 99% accurate at 4 seconds per item (not a statistically significant difference). The most reasonable conclusion is that

This study includes

Suppose you have a 2x2 design in which one of the variables is a between-subjects factor and one of the variables is a within-subjects factor. Further suppose that there will be 30 subjects in the upper left-hand cell of the 2x2 array. How many subjects are needed to complete the study?

How would you describe the design of this study?

One of the chapter's research examples concerned the so-called closing time effect. The researchers found that the gender of the rater made a difference and the time of the ratings also made a difference. That is, the study produced

In a 2x3 mixed factorial design, with 10 people needed to fill the upper left hand cell of the matrix, how many people will be needed to complete the experiment?

A study by Shute compared students who scored high or low on a measure of their tendency to be "exploratory." Half of each group then learned about electricity through a "rule-application" strategy, while the other half learned through a "rule-induction" strategy. Which of the following was true?

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?

With 30 teachers tested per cell of this design, how many teachers participated in the experiment?

A mixed factorial design has

In a 2x2 design, the following results occur:

In a 2x2 design, the following results occur:

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

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

In a 2 (gender)x 2 (type of therapy)factorial design, men were helped by therapy A, but women were helped by therapy B. This describes

Which of the chapter's research examples used a mixed design?

In the study by Grant et al. (1998), subjects studied text materials either in a noisy or a quiet environment and also recalled the material either in a noisy or a quiet environment. What was true about this study?