Document Detail

The Hidden Snake in the Grass: Superior Detection of Snakes in Challenging Attentional Conditions.
MedLine Citation:
PMID:  25493937     Owner:  NLM     Status:  Publisher    
Snakes have provided a serious threat to primates throughout evolution. Furthermore, bites by venomous snakes still cause significant morbidity and mortality in tropical regions of the world. According to the Snake Detection Theory (SDT Isbell, 2006; 2009), the vital need to detect camouflaged snakes provided strong evolutionary pressure to develop astute perceptual capacity in animals that were potential targets for snake attacks. We performed a series of behavioral tests that assessed snake detection under conditions that may have been critical for survival. We used spiders as the control stimulus because they are also a common object of phobias and rated negatively by the general population, thus commonly lumped together with snakes as "evolutionary fear-relevant". Across four experiments (N = 205) we demonstrate an advantage in snake detection, which was particularly obvious under visual conditions known to impede detection of a wide array of common stimuli, for example brief stimulus exposures, stimuli presentation in the visual periphery, and stimuli camouflaged in a cluttered environment. Our results demonstrate a striking independence of snake detection from ecological factors that impede the detection of other stimuli, which suggests that, consistent with the SDT, they reflect a specific biological adaptation. Nonetheless, the empirical tests we report are limited to only one aspect of this rich theory, which integrates findings across a wide array of scientific disciplines.
Sandra C Soares; Björn Lindström; Francisco Esteves; Arne Ohman
Related Documents :
20188657 - Discrimination of vibrotactile stimuli in the rat whisker system: behavior and neuromet...
16812007 - Stimulus generalization from feeder to response key in the acquisition of autoshaped pe...
22494907 - Comparative floral development in lithospermum (boraginaceae) and implications for the ...
22834487 - Switching the stereoselectivity: (fullero)pyrrolidines "a la carte"
16812207 - Determinants of contrast in the signal-key procedure: evidence against additivity theory.
24742137 - Anticipatory postural adjustments during cutting manoeuvres in football and their conse...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-12-10
Journal Detail:
Title:  PloS one     Volume:  9     ISSN:  1932-6203     ISO Abbreviation:  PLoS ONE     Publication Date:  2014  
Date Detail:
Created Date:  2014-12-10     Completed Date:  -     Revised Date:  2014-12-11    
Medline Journal Info:
Nlm Unique ID:  101285081     Medline TA:  PLoS One     Country:  -    
Other Details:
Languages:  ENG     Pagination:  e114724     Citation Subset:  -    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Independent Transitions between Monsoonal and Arid Biomes Revealed by Systematic Revison of a Comple...
Next Document:  Moderate Thermal Stress Causes Active and Immediate Expulsion of Photosynthetically Damaged Zooxanth...