What does the dot-probe task measure? A reverse correlation analysis of electrocortical activity
| Autor: | L. Forest Gruss, David R. Herring, Steven Garcia, Nina N. Thigpen, Andreas Keil |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Adult
Male medicine.medical_specialty genetic structures Cognitive Neuroscience media_common.quotation_subject Emotions Experimental and Cognitive Psychology Electroencephalography Audiology Neuropsychological Tests Measure (mathematics) 050105 experimental psychology Article Task (project management) 03 medical and health sciences Young Adult 0302 clinical medicine Developmental Neuroscience medicine Contrast (vision) Humans 0501 psychology and cognitive sciences Emotional expression Attention Sensory cue Biological Psychiatry media_common Cerebral Cortex medicine.diagnostic_test Endocrine and Autonomic Systems Orientation (computer vision) General Neuroscience 05 social sciences Facial Expression Electrophysiology Neuropsychology and Physiological Psychology Neurology Evoked Potentials Visual Female Cues Psychology Facial Recognition 030217 neurology & neurosurgery |
| Popis: | The dot-probe task is considered a gold standard for assessing the intrinsic attentive selection of one of two lateralized visual cues, measured by the response time to a subsequent, lateralized response probe. However, this task has recently been associated with poor reliability and conflicting results. To resolve these discrepancies, we test the underlying assumption of the dot-probe task—that fast probe responses index heightened cue selection—using an electrophysiological measure of selective attention. Specifically, we used a reverse correlation approach in combination with frequency-tagged steady-state visual potentials (SSVEPs). Twenty-one participants completed a modified dot-probe task in which each member of a pair of lateralized face cues, varying in emotional expression (angry-angry, neutral-angry, or neutral-neutral), flickered at one of two frequencies (15 or 20 Hz), to evoke SSVEPs. One cue was then replaced by a response probe, and participants indicated the probe orientation (0° or 90°). We analyzed the SSVEP evoked by the cues as a function of response speed to the subsequent probe (i.e. a reverse correlation analysis). Electrophysiological measures of cue processing varied with probe hemifield location: Faster responses to left probes were associated with weak amplification of the preceding left cue, apparent only in a median split analysis. By contrast, faster responses to right probes were systematically and parametrically predicted by diminished visuo-cortical selection of the preceding right cue. Together, these findings highlight the poor validity of the dot-probe task, in terms of quantifying intrinsic, nondirected attentive selection irrespective of probe/cue location. |
| Databáze: | OpenAIRE |
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