Psychology 2800E Lecture Notes - Lecture 16: Rubik'S Cube, Complement Factor B, Physical Attractiveness

• School: Western University
• Department: Psychology
• Course: Psychology 2800E
• Professor: Doug Hazlewood

Document Summary

Experiments with more than one independent variable (or factor ) Allow us to study the effects of more than one cause . Each unique combination of factors and levels defines a condition . Number of conditions = product of levels (multiply the levels of each factor) Examples: 2x2 factorial (simplest design, two factors (iv"s, each factor has two levels if it doesn"t have 2 levels, there"s no variability. 4 conditions (2x2=4: 3x3 factorial, two factors (iv"s); each factor has 3 levels. 9 conditions (3x3=9: 2x3x2 factorial, three factors, with 2, 3, and 2 levels. Note typo on p. 284 (w&m): a 3x3x3 factorial has 27 conditions, not 9. It"s possible to have any number of factors (with any number of levels): 2x4x3x7 . Assign a capital letter to each factor (a, b ) Create factorial matrix that represents all combinations of factors/levels: each cell represents a condition. Factor a: facial expression: a1 = neutral , a2 = smiling .