Table 2.

Means and SDs for ratings given by children in the four age groups on a scale of 1–5 stars as a function of art type, with Z and p yielded by a Wilcoxon test for each pairwise comparison in the rightmost columns.

	Abstract		Representational
Age group	Mean	SD	Mean	SD	Z	p (α = 0.0125)
4	3.37	0.72	3.26	0.72	−0.24	0.81
6	3.7	0.55	3.26	0.7	−2.48	0.013
8	3.47	0.67	3.49	0.58	−0.2	0.844
10	3.3	0.67	3.76	0.58	−2.2	0.028

Note that the Bonferroni-corrected alpha for this analysis was 0.0125.