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

Table 7

ANOVA over the factor AGE-GROUP ((1) 3-4 years old, (2) 4-5 years old, (3) 5-6 years old) and Error-Type (no markings, addition errors, substitution errors, and partial markings). Post hoc analyses calculated 𝑡-test over group contrasts (1, 2), (1, 3), and (2, 3). For pairwise contrasts of age-groups, 𝑃-values are Bonferroni-corrected to 𝑃<.017.

	ANOVA
Main effect AGE group:	𝐹(2,57)=4.6,𝑃<.02, pes:  .139
Main effect error type:	𝐹(3,171)=22.45,𝑃<.001, pes:  .283
Interaction:	𝐹(6,171)=3.3,𝑃<.02, pes:  .104
Error type	𝑇-tests
No markings	1 versus 2: 𝑡(38)=−2.4,𝑃<.03
	1 versus 3: 𝑡(38)=−2.5,𝑃<.02
	2 versus 3: 𝑡(38)=−.92,𝑃>.36
Addition errors	1 versus 2: 𝑡(38)=.50,𝑃>.62
	1 versus 3: 𝑡(38)=.37,𝑃>.97
	2 versus 3: 𝑡(38)=−.43,𝑃>.67
Substitution errors	1 versus 2: 𝑡(38)=2.1,𝑃<.05
	1 versus 3: 𝑡(38)=.99,𝑃>.32
	2 versus 3: 𝑡(38)=−.86,𝑃>.39
Partial markings	1 versus 2: 𝑡(38)=.54,𝑃>.59
	1 versus 3: 𝑡(38)=4.2,𝑃<.001
	2 versus 3: 𝑡(38)=3.9,𝑃<.001