Object Functions and Words Reexamined: Toddlers' Recognition of Function Depends on Object Type

Area of Science:

• Developmental psychology
• Cognitive science
• Linguistics

Background:

• The relationship between understanding object function and word acquisition in toddlers is a long-standing debate in developmental science.
• Prior research has not fully elucidated how toddlers' knowledge of object functions influences their vocabulary development.

Purpose of the Study:

• To investigate the connection between toddlers' comprehension of object functions and their word knowledge.
• To determine if toddlers form expectations about object functions and how this relates to their vocabulary size.

Main Methods:

• Forty 23- to 25-month-old toddlers participated in a preferential looking paradigm assessing expectations of object use.
• Toddlers' lexical knowledge was measured using a looking-while-listening task.
• Productive vocabulary was assessed using the MacArthur-Bates Communicative Development Inventory.

Main Results:

• Toddlers demonstrated functional expectations for some objects, particularly those with highly consistent everyday uses.
• The strength of functional expectations correlated with the object's typical function and the child's vocabulary size.
• Individual differences in object selection within the study influenced toddlers' ability to display functional knowledge.

Conclusions:

• Toddlers' understanding of object function is object-dependent and linked to their vocabulary size.
• Vocabulary development may play a role in shaping toddlers' expectations about object functions.
• Future research should consider object specificity when assessing toddlers' functional knowledge.