Acquisition of German Noun Plurals in Typically Developing Children and Children with Specific Language Impairment

Table 9

Comparison of the proportion of each error type over the factor group (SLI, MLU, AGE) and pairwise group contrasts (SLI, MLU) and (SLI, AGE) for substitution errors. For pairwise contrasts of the SLI group with each control group, 𝑃-values are Bonferroni-corrected to 𝑃<.025.

Error type	Kruskal-Wallis-test	Mann-Whitney 𝑈-test
No markings	𝑃>.50	—
Addition errors	𝑃>.41	—
Substitution errors	𝑃<.055	SLI versus MLU: 𝑈: 27.5, 𝑃>.63
		SLI versus AGE: 𝑈: 11.0, 𝑃<.03
Partial markings	𝑃>.23	—