Table 1.

Average proportion correct at pretest and posttest in each gesture condition and for each type of assessment item

		Gesture (G) condition
		No G to equation				G to equation
		No G to graph (N = 19)		G to graph (N = 20)		No G to graph (N = 20)		G to graph (N = 23)
Item type	Number of items	Pre	Post	Pre	Post	Pre	Post	Pre	Post
Equation encoding	2	.88	.99	.88	.95	.86	.95	.83	.98
Graph encoding	2	.30	.51	.25	.61	.21	.48	.26	.55
Translation	8	.26	.64	.35	.76	.37	.59	.35	.64
Identify terms in equation	1	.11	.63	.15	.60	.15	.63	.22	.65
Describe relation in words	1	.13	.55	.20	.65	.15	.45	.09	.65

Note: For each item, two problem elements were coded (slope and intercept).