Psychology 2800E Lecture Notes - Lecture 2: Theoretical Definition, Operational Definition, Covariance
Characteristic of interest that varies in the study (has at least two levels/values) Depends on what and who you are studying. The variable(s) that is kept constant o o o. Separate groups of subjects are assigned to each o. All subjects are assigned to all levels of the iv. Does not define how a variable is measured. Operational definition (od) o o o o that can be measured. We use psych concepts in everyday language all the. To discuss psych concepts rationally rather than time through our own biases. Variables are related and the nature of the relation. Internal validity = is it a good experiment? (a full lecture on this later) o o o o o o o. Need all 3 in order to infer causation. Account for individual differences (if between subjects design) 2 (coffee intake: yes, no) within subjects design with response time as the dv, od as: time to respond to a simple stimulus in millisecond.