This title appears in the Scientific Report :
2015
Statistical context and sensory stimulus abstraction dynamically interact during feature-based attentional control.
Statistical context and sensory stimulus abstraction dynamically interact during feature-based attentional control.
Poster C42Statistical context and sensory stimulus propertiesdynamically interact during feature-based attentionalcontrolDombert, Pascasie Leonie¹; Fink, Gereon R.²; Vossel, Simone¹¹Institute of Neuroscience and Medicine, Forschungszentrum Jülich,²University Hospital CologneSelecting relevant from a...
Saved in:
Personal Name(s): | Dombert, Pascasie Leonie (Corresponding author) |
---|---|
Fink, G. R. / Vossel, S. | |
Contributing Institute: |
Kognitive Neurowissenschaften; INM-3 |
Imprint: |
2015
|
Conference: | 41.Tagung „Psychologie und Gehirn“, Frankfurt a.M. (Germany), 2015-06-04 - 2015-06-06 |
Document Type: |
Abstract |
Research Program: |
(Dys-)function and Plasticity |
Publikationsportal JuSER |
Poster C42Statistical context and sensory stimulus propertiesdynamically interact during feature-based attentionalcontrolDombert, Pascasie Leonie¹; Fink, Gereon R.²; Vossel, Simone¹¹Institute of Neuroscience and Medicine, Forschungszentrum Jülich,²University Hospital CologneSelecting relevant from among competing information isa fundamental operation of the brain. Sensory propertiesas well as stimulus relevance influence this process. Herewe investigate the interaction of these two factors in threedifferent versions of a feature-based attention task (eachperformed by n=20 subjects). The color of a target stimuluswas cued perceptually, verbally, or semantically. Thepercentage of cue validity (%CV, i.e., the probability thatthe cue indicates the target’s color correctly) changed unpredictablybetween 50, 70 and 90%. Reaction times (RTs)for valid and invalid trials in each %CV condition were recordedand analyzed with analyses of variance. The resultsshowed that probabilities significantly affected attention,with higher RT costs for invalid cueing associated withhigher %CV. Importantly, this modulation depended uponthe sensory cue properties and the time on task: while astrong impact of %CV was found for semantic cueing inboth halves of the experiment, the effect solely emerged inthe second half of the experiment for perceptual and verbalcueing. Our data suggest that adding a top-down guidedattentional modulation by probabilities is more difficultwith more automatic cue processing. However, withmore observations and exposure to volatile contingencies,these probability-dependent effects can still be initiated.These results demonstrate that feature-based attentionalmechanisms cannot be ascribed to purely sensory or topdowninfluences. Instead, our data suggest that the impactof top-down and bottom-up factors in attentional controlis flexible and is dynamically concerted with statistical regularitiesin the environment. |