Word vs. World Knowledge: A developmental shift from bottom-up lexical cues to top-down plausibility

Area of Science:

• Psycholinguistics
• Developmental Psychology
• Cognitive Science

Background:

• Adults and children infer sentence structure during auditory comprehension.
• Children's comprehension of ambiguous sentences differs from adults', suggesting varied use of contextual information.
• Previous research indicates children may not utilize referential context cues as effectively as adults for resolving syntactic ambiguity.

Purpose of the Study:

• To investigate why children struggle to use top-down contextual cues for sentence structure inference.
• To test hypotheses regarding children's reduced use of top-down cues versus difficulties with unreliable cues.
• To compare how adults and children integrate reliable top-down cues with bottom-up cues during ambiguity resolution.

Main Methods:

• A visual world study was employed to examine ambiguity resolution in adults and 5-year-old children.
• The study manipulated the plausibility of interpretations (top-down cue) against lexical biases (bottom-up cue).
• Participant eye movements were tracked to measure their interpretation of ambiguous sentences.

Main Results:

• Both adults and children utilized both top-down and bottom-up information for sentence interpretation.
• Adults assigned greater weight to the top-down cue (plausibility).
• Children predominantly relied on the bottom-up cue (lexical biases), showing less influence from the top-down cue.

Conclusions:

• Children's limited use of top-down information persists even when it is highly valid and crucial for adult comprehension.
• Children exhibit a systematic preference for bottom-up processing over top-down processing compared to adults.
• This processing difference may stem from architectural variations in language comprehension systems or differences in processing speed between children and adults.