Sept 20, 2012
More Research Design
Net tie: The Synapse
What are some sources of bias in an experiment?
What is the basic structure of a neuron?
How do neurons “work”
***Sept 25: strategy for psych 1000 (workshop)
Case: Increases in temperature cause increases in aggression
Recorded temp each day and noted the number of reported assaults
More assaults were reported on hotter days
His claim is inaccurate because
- The data are correlational
Research Methods: observation, survey, case, study, correlation, experiment
All subjects exposed to all conditions
Ie) all watch violent shows measure aggression
All watch non-violent shows measure aggression
*Problem: potential order effect if you do one test first, it may affect how you
respond to second test.) need to counterbalance
Threats to Validity
o Degree to which experiment supports causal conclusion
o Study needs to have high internal validity
o Degree to which results can be generalized
Demand Characteristics Sept 20, 2012
o Cues in experiment convey hypothesis to participants
o They “help” experimenter
o If participant figures out what you’re studying, they’ll try to help by
learning toward certain result
Geen & Berkowitz: weapons effect
o Experimenter “conveys” hypothesis to participants
o Intons-Peterson (1983)
Best way to avoid this is double-blink experiment
Frequently Asked Questions
What do lab experiments tell us about everyday life?
Maximize internal validity and lessen external validity
Does behavior depend on one’s culture or gender or personality?
Behavior is dependent on person and how they developed/ were influenced
by their society
How to avoid this: random sampling-equal representations of different
What do animal experiments tell us about human behavior?
When we look at human visual system: look at cat, might be similar with
Is it ethi