Imageability and ambiguity effects in speeded naming: convergence and divergence

Area of Science:

• Cognitive psychology
• Psycholinguistics
• Computational neuroscience

Background:

• The role of semantic information in visual word recognition is debated.
• The influence of semantics on phonological computation is a key area of research.

Purpose of the Study:

• To investigate whether semantic information influences phonological computation during visual word recognition.
• To differentiate the roles of semantic and non-semantic pathways in word processing.

Main Methods:

• Two experiments using a speeded naming task were conducted.
• Experiment 1 examined imageability and ambiguity effects in word naming.
• Experiment 2 used nonword fillers to minimize semantic reliance.

Main Results:

• The imageability effect was eliminated when semantic reliance was minimized, suggesting a semantic locus.
• The ambiguity advantage persisted even when semantic reliance was reduced, indicating a non-semantic locus.
• These findings differentiate the processing pathways involved in visual word recognition.

Conclusions:

• Semantic information influences phonological computation, particularly for words with atypical spelling-sound mappings.
• The ambiguity advantage appears to stem from non-semantic processing routes.
• Results inform computational models of visual word recognition by specifying the role of semantic representation.