Surprise! Infants consider possible bases of generalization for a single input example

Area of Science:

• Cognitive Science
• Developmental Psychology
• Linguistics

Background:

• Infants generalize from limited examples.
• Generalization may occur via similarity detection or by explaining surprising input.
• Surprise, even from a single instance, might trigger generalization.

Purpose of the Study:

• To investigate if infants generalize from a single surprising example.
• To determine if surprise, not just similarity, drives rapid infant generalization.

Main Methods:

• Familiarized 9-month-old infants with a single three-syllable word.
• Input contained either one (repetition) or two (repetition, rare syllable) surprising features.
• Tested generalization to new strings maintaining familiarization features.

Main Results:

• Infants generalized only to novel strings that preserved all surprising features from the single familiarization example.
• Findings were consistent across experiments with one or two surprising features.

Conclusions:

• Surprise can promote rapid generalization in infants, even from a single instance.
• This challenges models of generalization solely based on repeated exposure or similarity detection.