PSYC 2360 Chapter Notes - Chapter 12: Observer-Expectancy Effect

• School: University of Guelph
• Department: Psychology
• Course: PSYC 2360
• Professor: Harvey Marmurek

Document Summary

A-b design: a single=subject design in which researchers take a baseline measurement and then introduce the intervention and measure the same variable again. Used to determine a cause and effect relationship. After, the researcher will measure the same variable again with the same participant. I. e. when monitoring someone with anorexia, you would measure the number of calories consumed over the course of a week to establish a baseline pattern (a) and then introduce an emotional trigger and assess caloric intake again (b) A change in measurement from a to b may suggest a causal relationship. A-b-a design: single-subject design in which researchers establish a baseline, introduce the intervention and measure the same variable again, the remove the intervention and take another measurement. A-b-a-b design: a single subject design in which researchers establish a baseline, introduce the intervention, remove the intervention, and then reintroduce intervention, measuring the dependant variable each time.