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Chp. 10 Complex Experimental Designs
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Final Exam
Terms in this set (36)
Factorial design
A design in which all levels of each independent variable are combined with all levels of the other independent variables. A factorial design allows investigation of the separate main effects and interactions of two or more independent variables.
Interaction
The differing effect of one independent variable on the dependent variable, depending on the particular level of another independent variable
IV x PV design
A factorial design that includes both an experimental independent variable (IV) and a nonexperimental participant variable (PV).
Main effect
The direct effect of an independent variable on a dependent variable.
Mixed factorial design
A design that includes both independent groups (between-subjects)and repeated measures (within- subjects) variables.
Moderator variable
A variable that influences the nature of the relationship between two other variables (an independent variable and a dependent variable). In a factorial design, the effect of the moderator variable is revealed as an interaction.
Simple main effect
In a factorial design, the effect of one independent variable at a particular level of another independent variable.
A simple experimental design with two levels of an independent variable cannot __________.
Detect a curvilinear relationship between variables.
__________ designs are research designs with more than one independent variable.
Factorial
Dr. Vickman conducted a __________ factorial design to examine the effects of music and room temperature on participant's memory. Participants were randomly assigned to study a list of nonsense words either listening or not listening to music in either a warm or cold room.
2x2
In a 3 x 3 factorial design, how many conditions are there in the experiment?
9
Dr. Snodgrass conducted a 2 x 2 x 4 factorial design. This design will yield information about the main effect of _________ independent variables.
3
In a factorial design, a main effect is the __________.
The effect of each independent variable on the dependent variable.
In a factorial design, a(an) ___________ between independent variables indicates that the effect of one independent variable is different at different levels of the other independent variable.
Interaction
In a IV x PV design, PV stands for __________.
Participant variable
What statistical procedure is used to assess the statistical significance of the main effects and the interaction(s) in a factorial design?
Analysis of variance
A __________ analysis examines mean differences at each level of the independent variable.
Simple main effects
If a researcher planned to have 20 participants in each condition of a 2 x 3 independent groups factorial design, how many participants would be needed for this experiment?
120
A researcher conducted a 2 x 2 completely repeated measures factorial design and planned 15 participants in each condition. How many participants would be required to conduct this experiment?
15
In a 2 x 2 x 3 factorial design, independent variable B has _________ levels
2
2 x 2 x 2 independent groups factorial design with 20 participants in each condition. How many participants?
120 participants
2 x 4 repeated measures factorial design with 20 participants in each condition. How many participants?
20 participants
3 x 3 mixed factorial design with 20 participants in each condition. How many participants?
60 participants
2 x 2 independent groups factorial design with 20 participants in each condition. How many participants?
80 participants
2 x 2 mixed factorial design with 20 participants in each condition. How many participants?
40 participants
When there are only two levels of the independent variable, the researcher cannot determine very much information about the exact form of the relationship between the independent variable and the dependent variable.
True
The simplest factorial design has two independent variables that both have two levels.
True
A 2 x 3 factorial design has three independent variables.
False
An interaction indicates that the effect of one independent variable depends on the particular level of another independent variable
True
A correlation coefficient is used to test the statistical significance of the moderator variable.
False
In a 2 x 2 x 2 x 2 factorial design, there are four conditions.
False
A total of 40 participants are needed for a 2 x 2 completely repeated measures design if the researcher wants 10 participants in each condition.
False
A mixed factorial design includes both independent groups and repeated measures procedures.
True
One way to increase the complexity of a simple factorial design is to increase the number of levels of the one of the independent variables
True
In a 2 x 2 x 2 factorial design, there are six independent variables.
False
Simplest factorial is a?
2x2 factorial design- two IV's with two levels for each IV
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