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Behavioural brain research v.321, 2017년, pp.123 - 129   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Overshadowing depends on cue and reinforcement sensitivity but not schizotypy

Pickett, Clare (Corresponding author at: School of Psychology, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom. ) ; Cassaday, Helen J. ; Bibby, Peter A. ;
  • 초록  

    Abstract There is evidence for impaired selective learning mechanisms in individuals high in schizotypy. Overshadowing provides a direct test of selective learning based on cue salience and has previously been reported to be impaired in relation to schizotypy scores. The present study tested for overshadowing using food allergy and Lego construction task variants. Both variants used the same number of conditioned stimulus (CS) cues and the same number of learning trials. CS cues were trained in compound pairs or in isolation and overshadowing was subsequently tested on trials followed by negative versus positive outcomes. Participants also completed the O-LIFE to measure schizotypy and BIS-BAS scales to measure reinforcement sensitivity. Learning was demonstrated for both cue variants; however overshadowing emerged only in the Lego variant and only on the trials followed by the negative outcome. Contrary to expectations, there was no evidence for any relationship between overshadowing and O-LIFE scores. However, there was evidence of a positive relationship between overshadowing and BAS-Drive as well as a negative relationship with BIS-Anxiety, for the trials followed by the positive outcome in the food allergy variant. These results suggest that the development of overshadowing depends on cue and reinforcement sensitivity, but not necessarily on schizotypy. Highlights Overshadowing has been reported to be impaired in relation to schizotypy. The present study systematically compared overshadowing in two task variants. Overshadowing was demonstrated using neutral Lego but not familiar food cues. Overshadowing was related to aspects of BIS-BAS but not schizotypy scores. The findings suggest that task variant is a determinant of brain substrates.


  • 주제어

    Overshadowing .   Associative learning .   Task motivation .   Schizotypy .   Reinforcement sensitivity.  

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