PSYC 2030 Chapter Notes - Chapter 10: Interrupted Time Series, Random Assignment, Time Series

• School: York University
• Department: Psychology
• Course: PSYC 2030
• Professor: John Grundy

Document Summary

Interrupted time series design: nonequivalent control group designs, evaluate the effectiveness of some treatment program. Those in the program are compared to those in a control group who aren"t treated. There is a built-in confound that can cloud the interpretaton of these studies: these designs can be effective for evaluating treatment programs when random assignment. Involves a pre test and a post test. Because the groups might differ on the pretest, the important comparison is the different amounts of change from pre- to posttest in the two groups. Matching: creates equivalent groups if the iv is a manipulated one and aparticipants can be randomly assigned to groups after being paired together on some matching variable. Matching can enhance the influence of a regression effect and even make it appear that successful program as failed. Interrupted time series designs: take measures for an extended period before and after an event expected to influence behavior.