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Lecture 9

FRHD 3070 Lecture 9: Week 9 – Factorial Designs
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Department
Family Relations and Human Development
Course Code
FRHD 3070
Professor
Hendry

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1. Week 9 – Factorial Designs
Research Design Types
-Single factor (one-way)
oStudies one independent variable
-Multi-factor
oStudies multiple independent variables
May have several levels
oExamples:
Two-way (e.g. 2 x 2)
Three-way (e.g. 2 x 2 x 2)
Factorial Designs
-Factorial designs use a specific number system
oThe number of numbers tells you how many IVs there are
oThe number values tell you how many levels
oE.g. in 3 x 4 factorial design, you would know that we had 2 IVs and that one IV
had 3 levels while the other had 4
Note that the order of the numbers makes no difference
oThe number of different treatment groups in any factorial design can be
determined by multiplying through the number notation
oi.e. 3 x 4 = 12 groups
-Defined
o A research design that uses more than one independent variable
-3 types of factorial designs
oBetween Participants
oWithin Participants
oMixed Participants
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Description
1. Week 9 Factorial Designs Research Design Types - Single factor (one-way) o Studies one independent variable - Multi-factor o Studies multiple independent variables May have several levels o Examples: Two-way (e.g. 2 x 2) Three-way (e.g. 2 x 2 x 2) Factorial Designs - Factorial designs use a specific number system o The number of numbers tells you how many IVs there are o The number values tell you how many levels o E.g. in 3 x 4 factorial design, you would know that we had 2 IVs and that one IV had 3 levels while the other had 4 Note that the order of the numbers makes no difference o The number of different treatment groups in any factorial design can be determined by multiplying through the number notation o i.e. 3 x 4 = 12 groups - Defined o A research design that uses more than one independent variable - 3 types of factorial designs o Between Participants o Within Participants o Mixed Participants
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