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. Author manuscript; available in PMC: 2025 Apr 1.
Published in final edited form as: Autism Res. 2024 Jan 10;17(4):838–851. doi: 10.1002/aur.3092

Table 5.

Effect Sizes (eta-squared) for Main Effects of Diagnostic Grouping and Age

Gestures Diagnostic Group Age
η2 95% CI p η2 [95% CI] p
Early Gestures
 12 months .07 [.03, .12] < .001 .03 [.01, .07] < .001
 18 months .12 [.05, .22] < .001 .00 [.00, .05] .182
 24 months .32 [.25, .39] < .001 .00 [.00, .03] .167
Later Gestures
 12 months .07 [.03, .12] < .001 .10 [.05, .16] < .001
 18 months .15 [.06, .25] < .001 .01 [.00, .08] < .05
 24 months .30 [.23, .37] < .001 .00 [.00, .03] .253

Notes. p-values are p-values for the main effects Diagnostic Group and Age at the different time points. CI: confidence interval; η2 indicates generalized eta-squared: η2 of .01 represents a small effect, η2 of .06 represents a medium effect, η2 of .14 represents a large effect.