PSY 102 Lecture Notes - Lecture 3: Astrocyte, Naturalistic Observation, Blind Experiment
19 Sep 2018
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Document Summary
High external validity - findings are generalizable to the real world (positive) Low internal validity - ability to draw cause-and-effect inference (negative) Ex. when a squirrel sees you, it runs away. Studying one or a small number of people for an extended period of time. Used to study rare brain damage or mental illness. Excellent for existence proofs , but can be misleading or anecdotal. Not used to generalize, very specific to a certain group of people. Self-report measures assess characteristics, such as personality or mental illness. In order for these measures to be accurate certain protocol must be met: random selection, Representative sample: use a sample that is reflective of a larger group (ex. Surveying 300 validity and reliability people out of 3000) Sample should be represented of the whole. Smaller group resembles larger group (gender, age, ethnicity, residence) Random selection - essential in order to generalize findings from surveys and questionnaires.
