Individual differences in categorization development: The mediation of executive functions and factual knowledge, the...

Cognitive mechanisms underpinning categorization development are still debated, either resulting from knowledge accretion or an increase in cognitive control. To disentangle the respective influence of accumulated factual knowledge and executive functions (inhibition, working memory, and cognitive flexibility) on (a) the development of categorization abilities in the food domain and (b) differences in this development by child characteristics (i.e., food neophobia), we conducted two experiments. The first experiment assessed 4-6-year-old children's (n = 122) ability to taxonomically categorize food at the superordinate level of categorization. The second experiment tested 3-6-year-old children's (n = 100) ability to cross-categorize the same food according to two different relationships alternatively (i.e., taxonomic and thematic). Results indicate that accumulated factual knowledge and executive functions mediated both the effect of age and the effect of food neophobia on categorization performance. Notably, the specific executive functions involved may vary depending on the categorization abilities tested, whereas world knowledge was always a prerequisite. Overall, this research highlights the complex interplay between accumulated factual knowledge, executive functions, and child characteristics in shaping the development of categorization abilities. (PsycInfo Database Record (c) 2024 APA, all rights reserved).