PSYC 2030 Chapter Notes - Chapter 5: Demand Characteristics, Developmental Psychology, Longitudinal Study

• School: York University
• Department: Psychology
• Course: PSYC 2030
• Professor: Rebecca Jubis

Document Summary

Sometimes unavoidable because of subject variable, manipulated independent variables. Disadvantage is that large numbers of people need to be recruited, tested + debriefed. Equivalent groups: groups of participants in a between subjects design that are essentially equal in all ways except levels of the independent variable. Random selection: getting volunteers to come into your study. Random assignment: method for placing participants, once selected for a study, into the other different groups, every person has an equal chance of being placed in any of the groups being formed. Blocked random assignment: procedure ensuring that each condition of the study has a participant randomly assigned to it before any condition is repeated a second time. Matching: participants are grouped together on some subject variable and then distributed randomly to the different groups in the experiment. Matching variable: variable selected for matching participants in a matched groups study. Used when number of subjects is small + random assignment is risky.