http://www.cnr.it/ontology/cnr/individuo/prodotto/ID37452
Color and luminance contrasts attract independent attention (Articolo in rivista)
- Type
- Label
- Color and luminance contrasts attract independent attention (Articolo in rivista) (literal)
- Anno
- 2002-01-01T00:00:00+01:00 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Morrone M. C., Denti V., Spinelli D. (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Titolo
- Color and luminance contrasts attract independent attention (literal)
- Abstract
- Paying attention can improve vision in many ways, including some
very basic functions such as contrast discrimination, a task that probably
reflects very early levels of visual processing. Electrophysiological,
psychophysical, and imaging studies on humans as well as single recordings
in monkey show that attention can modulate the neuronal response at an
early stage of visual processing, probably by acting on the response gain.
Here, we measure incremental contrast thresholds for luminance and color
stimuli to derive the contrast response of early neural mechanisms and
their modulation by attention. We show that, for both cases, attention
improves contrast discrimination, probably by multiplicatively increasing
the gain of the neuronal response to contrast. However, the effects of
attention are highly specific to the visual modality: concurrent attention
to a competing luminance, but not chromatic pattern, greatly impedes
luminance contrast discrimination; and attending to a competing chromatic,
but not luminance, task impedes color contrast discrimination. Thus, the
effects of attention are highly modality specific, implying separate
attentional resources for different fundamental visual attributes at early
stages of visual processing.
(literal)
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