Prime saliency in semantic priming with 18-month-olds

Area of Science:

• Developmental Psychology
• Cognitive Neuroscience
• Linguistics

Background:

• Semantic priming is a well-established phenomenon in adults, but its presence and mechanisms in pre-verbal infants are less understood.
• Investigating early semantic processing provides insights into the foundational architecture of the human semantic system.
• The inter-modal priming technique offers a valuable tool for probing cognitive processes in infants.

Purpose of the Study:

• To investigate semantic priming in 18-month-old infants.
• To examine the influence of prime repetition on semantic priming effects.
• To explore the role of stimulus onset asynchrony (SOA) on priming.

Main Methods:

• Utilized an inter-modal priming technique with 18-month-old infants.
• Measured infant looking times as an indicator of semantic processing.
• Manipulated prime repetition and prime-target stimulus onset asynchrony (SOA).

Main Results:

• Prime repetition led to longer looking times for related primes compared to unrelated primes.
• Priming effects varied with different stimulus onset asynchronies (SOAs), including positive, negative, and null effects.
• Findings support the existence of a structured semantic system in infants and are consistent with spreading activation and distributed models.

Conclusions:

• Eighteen-month-old infants exhibit semantic priming, indicating a developed semantic system.
• Prime repetition enhances the saliency of related semantic information.
• The inter-modal priming task is effective for studying lexical-semantic structure in young infants.