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Lecture 5

Psychology 1000 Lecture 5: PSYCH 1000 lec September 22

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Western University
Psychology 1000

PSYCH 1000 September 22, 2016 Biological Foundations ➢ More research design ➢ The neuron ➢ Action potential Next time: the synapse Scan: pg. 69-74 What are some sources of bias in an experiment? What is the basic structure of a neuron? How do neurons “work”? 1. Observation: • Problem: correlation 2. Experiment: • Between-groups design- easiest to set up • Within- groups design- all subjects exposed to all conditions. Need to counterbalance • Measuring aggression: ➢ Self-report- look at scales- how someone feels ➢ Verbal attack- look at people talking to one another and how they feel aggressive (yell, use of words) ➢ Physical attack ➢ “Safe" attack Threats to Validity: internal validity- degree to which experiment supports causal conclusion. More important external validity- degree to which results can be generalized Demand characteristics: - cues in experiment convey hypothesis to participants - they “help” experimenter - ex. Geen and Berkowitz- if someone was ready to be aggressive, and they saw a weapon, they would become more aggressive because a weapon resembles aggression experimenter expectancy: - experimenter “conveys” hypothesis to participants - ex. Intons-peterson- people came into lab and look at a map. There were two conditions, imagery (imagine this) and perception (look at this) condition. What do lab experiments tell us about everyday life? - Nothing, they are controlled Doesn’t behaviour depend on one’s culture or gender or personality? - Yes. If you’re not going to include that as a variable- you have to do random assignment What do animal experiments tell us about human behaviour? - They tell us a lot because we share a lot of the same or similar genetics as some animals either in learning (rat), or visual (cat), etc. Is it ethical to experiment on animals? Is it eth
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