Semantic priming in visual word recognition: Activation blocking and domains of processing

Area of Science:

• Cognitive Psychology
• Neuroscience
• Psycholinguistics

Background:

• Semantic priming, a robust effect in lexical decision tasks, is typically eliminated when primes undergo shallow processing, such as letter search.
• Previous research often attributes this elimination to the "shallowness" of the prime-processing task.

Purpose of the Study:

• To investigate whether shallow prime-processing tasks eliminate semantic priming.
• To differentiate between levels-of-processing and domain-specific processing accounts of semantic priming effects.

Main Methods:

• Three experiments were conducted using two distinct shallow prime-processing tasks: letter search and color identification.
• Participants performed lexical decisions on targets following prime presentation under different processing conditions.

Main Results:

• Lexical decisions to semantically related targets were not facilitated when participants searched the prime for a probe letter.
• Semantic priming was observed when participants performed a color discrimination task on the prime.

Conclusions:

• A levels-of-processing framework is inadequate for explaining the observed data.
• A domain-specific processing account is proposed: explicit letter-level processing (letter search) competes for resources with semantic processing, creating an activation block at the lexical-semantic interface.
• Color identification, a global judgment, does not interfere with visual word recognition resources, thus allowing semantic priming to occur.