This document discusses complex experimental designs, including factorial designs which involve two or more independent variables and one or more dependent variables. Specifically, it mentions a 2 x 3 factorial between-subjects design examining the interaction between medication dosage and age, as well as a mixed design factorial examining the interaction between picture book body size and grade level across three grades using a repeated measures/within-subjects approach for grade level.
3. Factorial Designs
• ≥ 2 Independent Variables
– Interaction
• ≥ 1 Dependent Variable
– e.g. 2 x 3 Factorial Design, Between-Subjects, IV x PV
LOW MED HIGH
YOUNGER
OLDER
Medication Dosage
Age
4. Factorial Designs
• ≥ 2 Independent Variables
– Interaction
– Independent groups / Between-Subjects
• Random, natural, or matched
– Repeated measures / Within-Subjects
– Mixed design
BELOW AVERAGE ABOVE
KINDERGARTEN 1 2 3
FIRST 4 5 6
SECOND 7 8 9
Picture Book Body Size
Grade
