PSYC 2030 Lecture Notes - Lecture 5: Observer-Expectancy Effect, Internal Validity

• School: York University
• Department: Psychology
• Course: PSYC 2030
• Professor: Raymond A Mar

Document Summary

Between-subjects, within-subjects = same participants in both conditions (control & experiment) Ways to carry out experiment this week. Experimental control = what makes experiments what they are. Internal - ways how the study is designed, structure. External - whether the results can be generalizable to the pop. No difference variables to control for = same ppl in each condition. Experience in one condition could affect performance in another. Order effects: how the order is fixed, control for order effects, use more than one sequence. A then b or b then a. Complete counterbalancing - controls for practice & fatigue. Between-subjects designs is a necessary control condition missing? true, in studies that occur over time. Maturation = effects simply due to time. History = non-treatment events testing issues (intervention) Occurs b/c we are starting with extreme scores. Reminds us that most scores are around the average.