Enumeration

Shape information and expertise

Roy Allen, Peter McGeorge

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This study examined the interaction between grouping information and expertise in a simple enumeration task. In two experiments. participants made rapid judgements about the number of items present in a visual display. Within each display, items were grouped into a canonical representation (e.g., triangle, square, and pentagon) or were arranged linearly. In both experiments, grouping information facilitated enumeration performance, replicating previous findings in the literature. In Experiment 2, the facilitative effect of grouping information was found to be greater for Air Traffic Controllers (ATCs) than for matched novices, though they were no better than novices on linear arrays. This may be because linear, like canonical arrays. hold unique numerosity information, but only when they contain the minimum number of points necessary to define a line (i.e., 2). So ATCs' performance on linear arrays containing more than two items does not benefit from a facilitative effect of grouping information. That their experience of being ATCs, in terms of years served, was shown to account for the expertise effect suggests that such visuospatial expertise is acquired through frequent exposure to spatial arrays. (C) 2008 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)26-31
Number of pages6
JournalActa Psychologica
Volume129
Issue number1
Early online date20 May 2008
DOIs
Publication statusPublished - Sep 2008

Keywords

  • attention
  • enumeration
  • subitizing
  • expertise
  • perceptual grouping
  • multiple object tracking
  • multiple-target tracking
  • equivalence
  • regularity
  • dots

Cite this

Enumeration : Shape information and expertise. / Allen, Roy; McGeorge, Peter.

In: Acta Psychologica, Vol. 129, No. 1, 09.2008, p. 26-31.

Research output: Contribution to journalArticle

Allen, Roy ; McGeorge, Peter. / Enumeration : Shape information and expertise. In: Acta Psychologica. 2008 ; Vol. 129, No. 1. pp. 26-31.
@article{ae71f38d6d034377ae09555ada3eb2ec,
title = "Enumeration: Shape information and expertise",
abstract = "This study examined the interaction between grouping information and expertise in a simple enumeration task. In two experiments. participants made rapid judgements about the number of items present in a visual display. Within each display, items were grouped into a canonical representation (e.g., triangle, square, and pentagon) or were arranged linearly. In both experiments, grouping information facilitated enumeration performance, replicating previous findings in the literature. In Experiment 2, the facilitative effect of grouping information was found to be greater for Air Traffic Controllers (ATCs) than for matched novices, though they were no better than novices on linear arrays. This may be because linear, like canonical arrays. hold unique numerosity information, but only when they contain the minimum number of points necessary to define a line (i.e., 2). So ATCs' performance on linear arrays containing more than two items does not benefit from a facilitative effect of grouping information. That their experience of being ATCs, in terms of years served, was shown to account for the expertise effect suggests that such visuospatial expertise is acquired through frequent exposure to spatial arrays. (C) 2008 Elsevier B.V. All rights reserved.",
keywords = "attention, enumeration, subitizing, expertise, perceptual grouping, multiple object tracking, multiple-target tracking, equivalence, regularity, dots",
author = "Roy Allen and Peter McGeorge",
year = "2008",
month = "9",
doi = "10.1016/j.actpsy.2008.04.003",
language = "English",
volume = "129",
pages = "26--31",
journal = "Acta Psychologica",
issn = "0001-6918",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Enumeration

T2 - Shape information and expertise

AU - Allen, Roy

AU - McGeorge, Peter

PY - 2008/9

Y1 - 2008/9

N2 - This study examined the interaction between grouping information and expertise in a simple enumeration task. In two experiments. participants made rapid judgements about the number of items present in a visual display. Within each display, items were grouped into a canonical representation (e.g., triangle, square, and pentagon) or were arranged linearly. In both experiments, grouping information facilitated enumeration performance, replicating previous findings in the literature. In Experiment 2, the facilitative effect of grouping information was found to be greater for Air Traffic Controllers (ATCs) than for matched novices, though they were no better than novices on linear arrays. This may be because linear, like canonical arrays. hold unique numerosity information, but only when they contain the minimum number of points necessary to define a line (i.e., 2). So ATCs' performance on linear arrays containing more than two items does not benefit from a facilitative effect of grouping information. That their experience of being ATCs, in terms of years served, was shown to account for the expertise effect suggests that such visuospatial expertise is acquired through frequent exposure to spatial arrays. (C) 2008 Elsevier B.V. All rights reserved.

AB - This study examined the interaction between grouping information and expertise in a simple enumeration task. In two experiments. participants made rapid judgements about the number of items present in a visual display. Within each display, items were grouped into a canonical representation (e.g., triangle, square, and pentagon) or were arranged linearly. In both experiments, grouping information facilitated enumeration performance, replicating previous findings in the literature. In Experiment 2, the facilitative effect of grouping information was found to be greater for Air Traffic Controllers (ATCs) than for matched novices, though they were no better than novices on linear arrays. This may be because linear, like canonical arrays. hold unique numerosity information, but only when they contain the minimum number of points necessary to define a line (i.e., 2). So ATCs' performance on linear arrays containing more than two items does not benefit from a facilitative effect of grouping information. That their experience of being ATCs, in terms of years served, was shown to account for the expertise effect suggests that such visuospatial expertise is acquired through frequent exposure to spatial arrays. (C) 2008 Elsevier B.V. All rights reserved.

KW - attention

KW - enumeration

KW - subitizing

KW - expertise

KW - perceptual grouping

KW - multiple object tracking

KW - multiple-target tracking

KW - equivalence

KW - regularity

KW - dots

U2 - 10.1016/j.actpsy.2008.04.003

DO - 10.1016/j.actpsy.2008.04.003

M3 - Article

VL - 129

SP - 26

EP - 31

JO - Acta Psychologica

JF - Acta Psychologica

SN - 0001-6918

IS - 1

ER -