Factorial Designs Quiz Flashcards
(10 cards)
In a matrix representing the structure of a factorial design, the mean differences among the columns define _______.
The main effect for one factor
The interaction between the factors
The main effect and the interaction between the factors
The significance
The main effect for one factor
In a factorial design, an interaction between the factors occurs whenever __________.
The mean differences between the cells are not explained by the main effects
The mean differences between the cells are explained by the main effects
There are differences between the overall column means
There are differences between the overall row means
The mean differences between the cells are not explained by the main effects
A researcher who is examining the effects of temperature and humidity on the eating behavior of rats uses a factorial experiment comparing three different temperatures (70, 80, 90*) and two humidity conditions (low and high). How many factors are in the experiment?
One
Two
Three
Six
Two
How many independent variables are there in a 2x2x2 factorial design?
Two
Three
Four
Eight
Three
How many main effects are there in a 2x3 factorial design?
Two
Three
Six
Nine
Two
The following data represent the means for each treatment condition in a two-factor experiment. What pattern of results is shown in the data?
Main effects for both factors and an interaction
Main effects for both factors and no interaction
A main effect for factor A, no main effect for factor B, and no interaction
A main effect for factor A and an interaction but no main effect for factor B
Main effects for both factors and an interaction
The results from a two-factor ANOVA show no main effect for factor A but a significant interaction. What can you conclude based on this pattern of results?
Factor A has no effect on the participants’ scores.
Factor A may have an effect but, if so, it depends on the levels of factor B.
Because the interaction is significant, factor A must also have an effect.
The effect of factor A is constant across all levels of factor B.
Factor A may have an effect but, if so, it depends on the levels of factor B.
The students in one gym class receive a self-esteem program as part of their sports training. To evaluate the program, a researcher measures self-esteem for the students before and after the program and compares their scores with those from another class that did not receive the program but was measured at the same two times. What kind of design is being used?
Between-subjects design
Within-subjects design
Repeated measures design
Mixed design
Mixed design
The advantage of a two-factor design compared to two single-factor designs is the ability to _______________.
Save time
Evaluate the interaction
Evaluate the main effects
Check the manipulation
Evaluate the interaction
How many separate groups of participants would be needed for a between-subjects, two-factor study with three levels of factor A and four levels of factor B?
Three
Four
Seven
Twelve
Twelve
