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PSYC 2360 Study Guide - Final Guide: Crackdown, Asthma, Measuring Instrument


Department
Psychology
Course Code
PSYC 2360
Professor
Naseem Al- Aidroos
Study Guide
Final

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final review 1/21/2013 4:08:00 PM
CHAPTER 11: Experimental Research: Factorial Designs I
Outline
o Factorial experimental designs
o 2 x 2 Between-subject factorial designs
o Understanding 2 x 2 interactions
o Interpreting 2 x 2 interactions
o Factorial designs with more than two factors
Example: Causal attributions
Finding:
o When interpreting another persons behaviour, we take social context into
account.
o But only when we have the resources (i.e., time, mental energy, etc.).
Gilbert et al. (1988)
o Person perception is a sequential process: characterization->correction
Factorial Experimental Designs
Example:
o Observe person having conversation and behaving anxiously
Factor 1: Social context
Discussing anxious vs. relaxing topics
Factor 2: Resource availability
Low vs. high cognitive load

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o
designs
o
manipulate more than one independent variable
AND
levels of all variables are completely crossed
o types:
2 x 2 two two-level factors (most commonly used)
2 x 3 a two-level factor and a three-level factor
3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 x 3 nine three-level factors
o Provides:
Number of factors
(given by the # of #’s)
Number of levels if each factor
(given by the value of each factor)
Total number of unique conditions
(2x2=4 unique conditions, etc.)
2 x 2 Between-subject factorial designs
can see:
o Main effect of factor 1
o Main effect of factor 2

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o Interaction between factor 1 and factor 2
Example: Subliminal messages (Greenwald)
o Listen to self-help tape. Asked, do you think it helped your memory?
Factor 1: Subliminal content on tape
Memory help vs. self-esteem help
Factor 2: Label on tape
Memory vs self-esteem
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