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Table 5:

Significant pairwise differences between lexical classes when predicting words’ ages of acquisition in language models and children (adjusted p < 0.05^*; p < 0.01^**; p < 0.001^***). A higher value indicates that a lexical class is acquired later on average. The five possible lexical classes were Noun, Verb, Adjective (Adj), Function Word (Function), and Other.

LSTM	GPT-2	Children
Adj < Function ^***	Adj < Function ^***	Nouns < Adj ^***
Adj < Nouns ^**	Adj < Other ^*	Nouns < Verbs ^***
Adj < Other ^**	Verbs < Function ^***	Nouns < Function ^***
Verbs < Function ^***	Verbs < Nouns ^*	Function > Adj ^***
Verbs < Nouns ^**	Verbs < Other ^**	Function > Verbs ^***
Verbs < Other ^*	Nouns < Function ^***	Function > Other ^***
		Other < Adj ^**
		Other < Verbs ^**

LSTM	GPT-2	Children
Adj < Function ^***	Adj < Function ^***	Nouns < Adj ^***
Adj < Nouns ^**	Adj < Other ^*	Nouns < Verbs ^***
Adj < Other ^**	Verbs < Function ^***	Nouns < Function ^***
Verbs < Function ^***	Verbs < Nouns ^*	Function > Adj ^***
Verbs < Nouns ^**	Verbs < Other ^**	Function > Verbs ^***
Verbs < Other ^*	Nouns < Function ^***	Function > Other ^***
		Other < Adj ^**
		Other < Verbs ^**