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Freeze or flee? Negative stimuli elicit selective responding
Zachary Estes1, Michelle Verges
1Department of Psychology, University of Warwick, Coventry, UK. z.estes@warwick.ac.uk
Cognition
|April 25, 2008
Summary
Negative stimuli slow cognitive tasks when valence is irrelevant, but speed up responses when valence is key. This suggests selective attention, not generalized motor suppression, explains negative word effects.
Area of Science:
- Cognitive psychology
- Neuroscience
- Human behavior
Background:
- Humans exhibit automatic vigilance towards negative stimuli.
- Negative words typically elicit slower responses in cognitive tasks compared to neutral or positive words.
- This has led to theories of generalized motor suppression in response to negative stimuli.
Purpose of the Study:
- To test the motor suppression hypothesis versus the response-relevance hypothesis.
- To investigate whether negative stimuli cause generalized motor suppression or selective response facilitation/inhibition.
- To differentiate the impact of negative stimuli based on task demands.
Main Methods:
- Lexical decision tasks and valence judgment tasks were employed.
- Participants responded to negative and positive words.
- Response times were measured for both task types.
Main Results:
- Negative words elicited slower responses in lexical decision tasks (valence irrelevant).
- Negative words elicited faster responses in valence judgment tasks (valence relevant).
- These findings contradict a generalized motor suppression effect.
Conclusions:
- Negative stimuli do not induce a universal motor suppression.
- Negative stimuli modulate responding selectively based on task relevance.
- Response-relevance is a critical factor in understanding cognitive responses to negative stimuli.
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