SOCECOL 10 Lecture 10: Factorial Designs (02/13/17)
Document Summary
A factorial design is a study that has one dependent variable but two independent variables. Demonstration study as an example: movie enjoyment, movie type and gender. What are the different factors that influence how much people enjoy watching movies: dependent variable: enjoyment of movie. This is a 2 x 2 factorial design: there are two independent variables (n x n) and two variations for each (2 x 2) Between-subjects design means different people in the cells: get the averages of each cell, then calculate the marginal means. Romantic comedy vs. action: all of romantic comedy, all of action. Males vs. females: all of males. Main effect of gender: all of females. Me(cid:374) o(cid:396) (cid:449)o(cid:373)e(cid:374)? (cid:863) i(cid:374) the (cid:373)ost p(cid:396)e(cid:272)ise (cid:449)a(cid:455) possi(cid:271)le . Interaction if the (cid:271)est a(cid:374)s(cid:449)e(cid:396) is (cid:862)it depe(cid:374)ds(cid:863) (not parallel slopes) If the slopes are parallel, that means there is no interaction.
