PSYC1002 Lecture 7: Lecture 7
Document Summary
Dv cannot be contaminated by exposure to all levels of the iv. Each participant is required for a shorter time. More variation because participants in each group are not the same. Within groups (repeated measures design: participants complete all levels of the iv at different times. Each person can act as their own "control. Allows researcher to examine effects over time. May not be possible for participant to be in all conditions of the experiment (time constraints, fatigue) Occur when a participant in an experiment performs a task, then performs again (learning) When exposure to one level of iv (group) "carries over" into another exposure. Addresses order effects by having 2 groups each whom are subjected to the iv in different orders. Interested in whether red wine causes a worse hangover than white wine. Match person in red group to person in white group for age, migraines. The variability between the two groups is minimised.
