PSY 250 Lecture Notes - Lecture 2: Psy

• School: University at Buffalo
• Department: Psychology
• Course: PSY 250
• Professor: Quinton Wendy

Document Summary

Factorial designs: designs with more than one iv. Called factorial because they have muliple factors (iv"s). Advantage: allows" invesigaion of complex relaionship between variables. Disadvantage: complex relaionships are more diicult to interpret than simple ones: ex. What are the efects of amount studying (5 hrs vs. 10 hrs) and having eaten breakfast (no breakfast vs. breakfast) on test performance. Terminology: [ number of levels of iv 1] x [ number if levels of iv 2] In our test performance example: 2 x 2 (pronounced two by two ) Or: 2 (amt study: 5 hours vs. 10 hours) x 2 (brkfst: none vs. brkfst) Was a 2 x 2 what about: 2 x 3. One has two levels; one has three levels. What does it look like: 3 x 3. What does it look like: 2 x 2 x 2. What does it look like: 2 x 3 x 4 x 2.