PSYC 200W Chapter Notes - Chapter 9: Repeated Measures Design, Latin Square, Random Assignment
16 Jan 2019
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Basic issues in experimental research: experiment has 3 ** properties, vary at least one independent variable to assess its effects on participant"s responses, researcher must have power to assign participants to the various experimental conditions -- > initial equivalence: control all extraneous variables, manipulating the independent variable. Types of independent variables: environmental: experimental modifications of aspects of a research setting, confederates: accomplices of researcher who pose as other participants/bystanders. Instructional manipulations: vary independent variable through instructions/info that participants receive. Invasive manipulations: creating physical changes in participants body through physical stimulation. Assessing the impact of independent variables: pilot test : test whether levels of independent variables are diff enough to be detected by participants, manipulation check: determine whether independent variable was manipulated successfully. Independent variables v subject variables: subject/participant variables: reflect existing characteristics of the participant, dependent variable: response being measured in a study, assigning participants to conditions, randomized groups design: "b/w subjects/groups design" --> diff in behavior.
