Observers represent the average properties of object ensembles even when they cannot identify individual elements. To investigate the functional role of ensemble statistics, we examined how modulating statistical stability affects visual search. We varied the mean and/or individual sizes of an array of Gabor patches while observers searched for a tilted target. In "stable" blocks, the mean and/or local sizes of the Gabors were constant over successive displays, whereas in "unstable" baseline blocks they changed from trial to trial. Although there was no relationship between the context and the spatial location of the target, observers found targets faster (as indexed by faster correct responses and fewer saccades) as the global mean size became stable over several displays. Building statistical stability also facilitated scanning the scene, as measured by larger saccadic amplitudes, faster saccadic reaction times, and shorter fixation durations. These findings suggest a central role for peripheral visual information, creating context to free resources for detailed processing of salient targets and maintaining the illusion of visual stability.
Stable statistical representations facilitate visual search / Corbett, Jennifer Elise; Melcher, David Paul. - In: JOURNAL OF EXPERIMENTAL PSYCHOLOGY-HUMAN PERCEPTION AND PERFORMANCE. - ISSN 0096-1523. - STAMPA. - 40:5(2014), pp. 1915-1925.
|Titolo:||Stable statistical representations facilitate visual search|
|Autori:||Corbett, Jennifer Elise; Melcher, David Paul|
|Titolo del periodico:||JOURNAL OF EXPERIMENTAL PSYCHOLOGY-HUMAN PERCEPTION AND PERFORMANCE|
|Anno di pubblicazione:||2014|
|Numero e parte del fascicolo:||5|
|Codice identificativo Scopus:||2-s2.0-84925851260|
|Codice identificativo Pubmed:||25045903|
|Codice identificativo ISI:||WOS:000342506900018|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1037/a0037375|
|Citazione:||Stable statistical representations facilitate visual search / Corbett, Jennifer Elise; Melcher, David Paul. - In: JOURNAL OF EXPERIMENTAL PSYCHOLOGY-HUMAN PERCEPTION AND PERFORMANCE. - ISSN 0096-1523. - STAMPA. - 40:5(2014), pp. 1915-1925.|
|Appare nelle tipologie:||03.1 Articolo su rivista (Journal article)|