Exam 11: True Experiments, Part 2 Factorial Designs

Graph the interaction of factor B, visual and audio presentation via video) versus audio only presentation of course content, and Factor A, sex, from the following cell means on a standardized mid-term examination. Does there appear to be an interaction? Discuss your conclusions. Presentation Method ------------------------------------------- Gender B₁V&A) B₂AD) ---------------------------------------------------------- A₁ Boys ) 47 46 A₂ Girls) 50 49 ----------------------------------------------------------

A major advantage of a two-factor analysis of variance over a one-factor analysis of variance is that

A factorial design involves at least two

Factorial designs are used mainly to

Barnes, Ickes, and Kidd 1979) studied whether or not students would lend their notes to a classmate by varying the intentionality of the needy student unintentional vs attentional) and the stability of their request always vs sometimes). Participants received one request from one needy student. What was the design of the experiment?

If a 2 x 2 factorial design were used, what would the two independent variables be?

Strayer, Drews, and Johnston 2003) had participants in a study follow a pace car in front of them in a driving simulator. Half of the participants found themselves driving in heavy stop-and-go traffic in the simulator, while the other half were in the same situation in lighter traffic. Strayer and his colleagues measured how quickly each participant was able to apply the brakes when the car in front of them stopped under two different conditions that formed the within-subjects variable: When they were involved in a cell phone conversation on an interesting topic and when they were not on the telephone. The design of this experiment was

In the simplest case of factorial design, ____________ are tested

Factorial designs involve

If babies play longer with green fuzzy toys than yellow fuzzy toys, green smooth toys, or yellow smooth toys, then

When two variables interact

An advertiser is interested in the effects of color and size of containers on people's tendency to buy a certain brand of cereal. He prepares containers consisting of all combinations of color with size and asks each of a group of subjects which of the containers they would be most and least likely to buy. What type of design does this study represent?

Is there a main effect of A?

If a factorial design is conducted in which each subject experiences each condition at least once, then it is a

Is it possible to have an interaction when there are no main effects in a factorial design?

In a single experiment, amount of reward and type of reward are simultaneously varied. Subjects are randomly assigned to one of three amount-of-reward conditions. Each subject is tested once with one type of reward and once with a second type of reward. What type of design does this study represent?

If neither Variable A nor Variable B has a main effect you can have

The results of a 2 x 2 experiment will fit one of _______ possible patterns

In order to tell if there is a main effect of A, you need to consider the

The dependent variable is