PSYCH 1000 September 22, 2016
➢ 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”?
• Problem: correlation
• Between-groups design- easiest to set up
• Within- groups design- all subjects exposed to all conditions. Need to
• 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
- 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 “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