Factorial Design Chtp 8
Define: Main Effect
the effect of one independent variable, averaged over all levels of another independent variable.
A repeated measure design that uses a reverse/block counterbalance consists of?
within- Subject design IV manipulated Manipulated by definition how often tested per conditions less than once
What does a 2x2 Factorial Design tell us?
2 IVs, 4 conditions, 2 level within each IV
2 x 4 repeated measures factorial design with 20 participants in each condition. How many participants?
20 participants
In a 3x4x5 Factorial design: Identify IVs, levels, conditions?
3 IVs 3-4-5 Levels 60 conditions
2 x 2 mixed factorial design with 20 participants in each condition. How many participants?
40 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
Defined: PxE factorial Designs
A factorial design with at least one subject factor (P=person variable) and one manipulated factor (E= environmental variable)
Define: Mixed PxE Factorial Design
A mixed design with at least one subject factor and one manipulated factor that includes a between or within subject variable
Define: Independent group design
Between- subject design IVs manipulated Forms equivalent groups by random assignment
What are the two kinds of results that occur in a Factorial design
Main Effect Interaction
Define: Matched Group design
Manipulated IVs Forms equivalent group by matching Between subject
What type of design involves a mixture of between and within subjects IV in the same experiment?
Mixed Factorial Design
Define: Mixed Factorial Design
Mixed Factorial Design A factorial design with at least one between-subject factor and one within-subjects factor
How can one tell graphically if there is an interaction between two variables?
The dependent variable is plotted as a function of an independent variable, with the other independent variable as a parameter. If the graphical representation of a factorial experiment shows curves that are not parallel, there is an interaction between the variables. If they are parallel, however, there is no interaction. This is true no matter how complicated the curve may be, however small differences may be the result of chance, so statistical evaluation may be necessary.
Define: Factorial Matrix
a row and column arrangement that characterizes a factorial desgins and shows the IVs, the levels of each IVs and the total number of conditions (cells) in the study
Define: Factorial Design
a study with more than one IV
Define: Single-Factor Multilevel Designs
any design with a single independent variable and more than two levels of the independent variable and
Define: ex post facto design
between subject design subject variable groups intrinsically not equal possible matching to increase equivalence
Define: Placebo Control Group
control group in which some ptps believe they are receiving the experimental treatment, but they are not
In a factorial design, Define: condition?
equals the number of cells in a matrix
How is a Factorial designed described, using a standardized notation system?
has a numbering system that simultaneously identifies the number of IVs and the number of levels of each IVs
State the 4 basic design that can be called "single-factor design: two levels"
independent group Matched Group repeated measure group Ex posto factor group
Define: Simple Effect analysis
involves the comparing each of the levels of one factor with each levels of the other factor
A ex post facto design is also known as
non-equivalent group design
Define: Interaction Effect
occurs when the effect of one IV depends on the level of another IV
The term levels in Factorial Design means?
refers to the number of levels of any one IV
In a factorial design, each digits in a standardized notation system represents?
represents an IV and the numerical value of each digit indicates the number of levels
