PSYB01H3 Lecture : November 22
Document Summary
= a pretest is given before the experimental manipulation is introduced to make sure groups are equivalent at the beginning of the experiment. Assess equivalency of groups with small sample size. Can use to select participants for the experiment. Results for posttest only and pretest-posttest conditions have no significant differences in both control and experimental groups. Conditions are identical because person is own control group. issues to consider in repeated measures designs: counterbalancing(changing orders for experiment for studies to control for order effect) Each condition or groups appears once at each order and each condition precedes and follows each other condition one time. Need 2 latin squares for odd number: determine the number of conditions, and use letters of the alphabet to represent them: abcdef for six conditions, determine the order for the first row, using the following ordering: Ab l c l-1 d l-2 e etc (l=final condition) What would order for six conditions be? www. notesolution. com.
