SACR 2900 Lecture Notes - Lecture 12: Ecological Validity, Blind Experiment, Internal Validity
17 Feb 2020
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Document Summary
Some threats to internal validity: selection, were these experimental or control groups identical at the time of the study, history, did some other event produce these findings, can result in change, experimental mortality. If someone quits, this is going to distort things: testing. Threats to external validity: experimenter bias, participant reactivity, certain behaviors are going to change, depends on the person and how they are feeling, unrepresentative samples. One example of representative design is the solomon four group design. All of classical experimental design features plus two additional groups who are not pretested. Bandura"s aggression testing: studied children"s violent behaviour, originally done in early 1960s. An experiment design in which neither the subjects nor the experimenters know which is the experimental and which is the control group. An information collection method used to describe, compare, or explain individual and societal knowledge, feelings, values, preferences, and behavior.
