marginally significantp = 0.055
A computation of Tukey HSD (Tukey Honest Significant Differences, R function: TukeyHSD()) for performing multiple pairwise-comparison between the means of developmental groups found a significant difference in tokens ( p < 0.001) and types ( p < 0.001) between the Prelexical and the Advanced-Lexical group, a marginally significant difference in tokens ( p = 0.055) but not in types ( p = 0.48) between the Prelexical and the Early-Lexical group, and no significant difference in tokens ( p = 0.13) but in types ( p < 0.05) between Early-Lexical and Advanced-Lexical group.