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

Table 10

Qualitative comparison of addition and 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
Addition of -n	𝑃<.007	SLI versus MLU: 𝑈=14.5, 𝑃<.05
		SLI versus AGE: 𝑈=8.0, 𝑃<.005
Addition of -s	𝑃<.016	SLI versus MLU: 𝑈=27.0, 𝑃>.58
		SLI versus AGE: 𝑈=3.0, 𝑃<.003
Substitution with -e	𝑃>.59	SLI versus MLU: 𝑈=28.5, 𝑃>.70
		SLI versus AGE: 𝑈=22.0, 𝑃>.29
Substitution with -(e)n	𝑃>.41	SLI versus MLU: 𝑈=22.0, 𝑃>.24
		SLI versus AGE: 𝑈=24.0, 𝑃>.36