By Hand: Subjects were trained torespond to a 12-inch visual stimulus and then were tested onstimuli of different sizes (9, 10, 11, 12, 13, 13, 14, and 15inches). The response measure was the degree to which the subjectsresponded on the first test trial. There were n = 14 subjects ineach group. The means for the a = 7 groups are as follows:
9 in 10in 11 in 12 in 13in 14 in 15 in
1.52 2.64 4.28 3.86 3.86 2.79 3.70
Conduct an analysis of the linear andthe quadratic trends (the within-groups mean square was 5.84). Plotthe predicted group means and the actual group means. What do youconclude?
