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Naming and categorizing objects: task differences modulate the polarity of semantic effects in the picture-word
Ansgar Hantsch1, Jörg D Jescheniak, Andreas Mädebach
1Kognitionspsychologie, Institut für Psychologie, Universität Leipzig, Seeburgstraße 14-20, 04103 Leipzig, Germany. hantsch@uni-leipzig.de
Memory & Cognition
|February 29, 2012
Summary
The picture-word interference paradigm reveals semantic interference during picture naming and semantic facilitation during picture categorization. This study confirms these effects are task-dependent, not due to response level differences in lexical retrieval.
Area of Science:
- Cognitive Psychology
- Psycholinguistics
- Neuroscience
Background:
- The picture-word interference paradigm is crucial for understanding lexical retrieval in speech production.
- Previous studies show semantic interference in naming and facilitation in categorization.
- A confound existed between task instructions and response levels (basic vs. superordinate).
Purpose of the Study:
- To investigate the polarity reversal of semantic effects in the picture-word interference paradigm.
- To determine if task instructions or response levels drive semantic interference/facilitation.
- To isolate the impact of task type on lexical retrieval.
Main Methods:
- Participants performed both picture naming and categorization tasks at the basic response level.
- The same pictures, semantic distractors, and verbal responses were used across tasks.
- Controlled for response level differences to isolate task effects.
Main Results:
- Semantic interference was confirmed during picture naming.
- Semantic facilitation was confirmed during picture categorization.
- The polarity reversal of semantic effects was replicated under controlled conditions.
Conclusions:
- The polarity reversal of semantic effects is a genuine result of task differences, not response level artifacts.
- Findings support models of language production that emphasize task-specific processing.
- This research clarifies the role of task demands in lexical selection during speech.
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