PSYC 2001 Chapter Notes - Chapter 13: Internal Validity, Quasi, Repeated Measures Design

• School: Carleton University
• Department: Psychology
• Course: PSYC 2001
• Professor: Deanna Whelan

Document Summary

What do researchers give up when they conduct studies without full experimenter control. Friday, december 8, 2017: internal validity - the researchers ability to draw casual conclusions from the results. Matched groups: an experimental design technique in which participants who are similar on some measured variable are grouped into sets; the members of each matched set are then randomly assigned to different experimental conditions (blind design) Wait list design: participants plan to receive treatment, but are assigned to do so at different times. 2) design confounds: a threat to internal validity in an experiment in which a second variable happens to vary systematically along with the independent variable and therefore in an alternative explanation for the results. 3) maturation threat: a threat to internal validity that occurs when an observed change in an experimental group could have emerged more or less spontaneously over time.