Table 4.

Interests and difference in interests by diagnostic group

Variable	Full sample statistics			Ms for diagnostic groups			η2	p
	M	SD	Range	AU30	DS30	TD18
Director	2.7	0.39	1.8–3.8	2.4a	2.8b	2.8b	.14	< .001
Old objects	2.7	0.40	1.8–3.7	2.9a	2.6b	2.7ab	.05	.080
New objects	2.9	0.40	1.8–3.8	2.7a	2.9ab	2.9b	.06	.035
Old objects-director	−0.01	0.57	−1.4–1.6	0.42a	−0.15b	−0.12b	.16	< .001
New objects-director	0.15	0.48	−1.3–1.6	0.24	0.11	0.13	.01	.55
New–old objects	0.16	0.62	−1.6–1.9	−0.18a	0.25b	0.24b	.08	.013

AU Autism, DS Down syndrome, and TD typical development group; subscripts refer to average age (in months) at observation. For the first two balance variables (rows four and five), positive values indicate stronger interest in the objects than the director. For the last balance variable (row six), positive values indicate stronger interest in the new, unfamiliar objects than the old, familiar ones. n = 23, 29, and 56 for AU, DS, and TD groups, respectively. Means that do not differ significantly per Tukey post hoc test, p <. 05, share a common subscript. Effect size (η²) and exact p-value are from a one-way analysis of variance