Different reaction-times for subitizing, estimation, and texture.

Abstract:

:Humans can estimate and encode numerosity over a large range, from very few items to several hundreds. Two distinct mechanisms have been proposed: subitizing, for numbers up to four and estimation for larger numerosities. We have recently extended this idea by suggesting that for very densely packed arrays, when items are less segregable, a third "texture" mechanism comes into play. In this study, we provide further evidence for the existence of a third regime for numerosity. Reaction times were very low in the subitizing range, rising rapidly for numerosities greater than four. However, for tightly packed displays of very high numerosities, reaction times became faster. These results reinforce the idea of three regimes in the processing of numerosity, subitizing, estimation, and texture.

journal_name

J Vis

journal_title

Journal of vision

authors

Pomè A,Anobile G,Cicchini GM,Burr DC

doi

10.1167/19.6.14

subject

Has Abstract

pub_date

2019-06-03 00:00:00

pages

14

issue

6

issn

1534-7362

pii

2735975

journal_volume

19

pub_type

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