scholarly journals How might the discrepancy in the effects of perceptual variables on numerosity judgment be reconciled?

2010 ◽  
Vol 72 (7) ◽  
pp. 1839-1853 ◽  
Author(s):  
M. Tokita ◽  
A. Ishiguchi
Keyword(s):  
Numerosity Judgment

Strategic Aspects of Numerosity Judgment: The Effect of Task Characteristics

2003 ◽  
Vol 50 (1) ◽  
pp. 63-75 ◽  
Author(s):  
Koen Luwel ◽  
Lieven Verschaffel ◽  
Patrick Onghena ◽  
Erik De Corte
Keyword(s):  
Task Characteristics ◽  
Numerosity Judgment

scholarly journals Non-informative vision improves spatial tactile discrimination on the shoulder but does not influence detection sensitivity

2020 ◽  
Vol 238 (12) ◽  
pp. 2865-2875
Author(s):  
Fabrizio Leo ◽  
Sara Nataletti ◽  
Luca Brayda
Keyword(s):  
Tactile Stimulation ◽  
Detection Threshold ◽  
Receptive Fields ◽  
Judgment Task ◽  
The Body ◽  
Detection Sensitivity ◽  
Body Parts ◽  
Tactile Acuity ◽  
Tactile Stimuli ◽  
Numerosity Judgment

Abstract Vision of the body has been reported to improve tactile acuity even when vision is not informative about the actual tactile stimulation. However, it is currently unclear whether this effect is limited to body parts such as hand, forearm or foot that can be normally viewed, or it also generalizes to body locations, such as the shoulder, that are rarely before our own eyes. In this study, subjects consecutively performed a detection threshold task and a numerosity judgment task of tactile stimuli on the shoulder. Meanwhile, they watched either a real-time video showing their shoulder or simply a fixation cross as control condition. We show that non-informative vision improves tactile numerosity judgment which might involve tactile acuity, but not tactile sensitivity. Furthermore, the improvement in tactile accuracy modulated by vision seems to be due to an enhanced ability in discriminating the number of adjacent active electrodes. These results are consistent with the view that bimodal visuotactile neurons sharp tactile receptive fields in an early somatosensory map, probably via top-down modulation of lateral inhibition.

Multisensory temporal numerosity judgment

2008 ◽  
Vol 1242 ◽  
pp. 116-125 ◽  
Author(s):  
Tom G. Philippi ◽  
Jan B.F. van Erp ◽  
Peter J. Werkhoven
Keyword(s):  
Numerosity Judgment

scholarly journals Topology-defined units in numerosity perception

2015 ◽  
Vol 112 (41) ◽  
pp. E5647-E5655 ◽  
Author(s):  
Lixia He ◽  
Ke Zhou ◽  
Tiangang Zhou ◽  
Sheng He ◽  
Lin Chen
Keyword(s):  
Number Sense ◽  
Color Contrast ◽  
Intraparietal Sulcus ◽  
Tuning Curves ◽  
Visual Property ◽  
Numerosity Judgment ◽  
Wide Range ◽  
Color Similarity ◽  
Equality Judgment ◽  
Numerosity Perception

What is a number? The number sense hypothesis suggests that numerosity is “a primary visual property” like color, contrast, or orientation. However, exactly what attribute of a stimulus is the primary visual property and determines numbers in the number sense? To verify the invariant nature of numerosity perception, we manipulated the numbers of items connected/enclosed in arbitrary and irregular forms while controlling for low-level features (e.g., orientation, color, and size). Subjects performed discrimination, estimation, and equality judgment tasks in a wide range of presentation durations and across small and large numbers. Results consistently show that connecting/enclosing items led to robust numerosity underestimation, with the extent of underestimation increasing monotonically with the number of connected/enclosed items. In contrast, grouping based on color similarity had no effect on numerosity judgment. We propose that numbers or the primitive units counted in numerosity perception are influenced by topological invariants, such as connectivity and the inside/outside relationship. Beyond the behavioral measures, neural tuning curves to numerosity in the intraparietal sulcus were obtained using functional MRI adaptation, and the tuning curves showed that numbers represented in the intraparietal sulcus were strongly influenced by topology.

Strategic Aspects of Numerosity Judgment: The Effect of Task Characteristics

2003 ◽  
Vol 50 (1) ◽  
pp. 63-75 ◽  
Author(s):  
Koen Luwel ◽  
Lieven Verschaffel ◽  
Patrick Onghena ◽  
Erik De Corte
Keyword(s):  
Linear Regression ◽  
Regression Models ◽  
Strategic Change ◽  
Strategy Use ◽  
Point Of View ◽  
Cognitive Tasks ◽  
Task Characteristics ◽  
Linear Regression Models ◽  
Grid Analysis ◽  
Numerosity Judgment

In previous investigations we documented that people use several strategies to determine different numerosities of blocks that are presented in a square grid. One of these strategies is the clever subtraction strategy, wherein the number of empty squares in the grid is subtracted from the total number of squares in the grid. In the present study we investigated participants’ flexibility in strategy use when varying the shape of the grid. Analysis of the results in terms of the theoretical framework of Lemaire and Siegler (1995 ) regarding strategic change shows that this contextual variable affected the frequency, execution time, and accuracy of subjects’ use of the subtraction strategy. The usefulness of this framework for analyzing the nature of the adaptation to contextual variations is discussed. From a methodological point of view, this study documents the potential of Beem’s (1993 , 1999) segmented linear regression models for assessing subjects’ strategy use in cognitive tasks.

scholarly journals Correction to: Unique numerical competence of Asian elephants on the relative numerosity judgment task

2019 ◽  
Vol 38 (1) ◽  
pp. 127-127
Author(s):  
Naoko Irie ◽  
Mariko Hiraiwa-Hasegawa ◽  
Nobuyuki Kutsukake
Keyword(s):  
Open Access ◽  
Judgment Task ◽  
Numerical Competence ◽  
Asian Elephants ◽  
Numerosity Judgment

The article Unique numerical competence of Asian elephants on the relative numerosity judgment task, written by Naoko Irie, Mariko Hiraiwa‑Hasegawa and Nobuyuki Kutsukake, was originally published Online First without Open Access.

scholarly journals Effect on numerosity judgment of grouping of tones by auditory channels

1979 ◽  
Vol 26 (5) ◽  
pp. 374-380 ◽  
Author(s):  
Gert ten Hoopen ◽  
Joos Vos
Keyword(s):  
Numerosity Judgment

scholarly journals Unique numerical competence of Asian elephants on the relative numerosity judgment task

2018 ◽  
Vol 37 (1) ◽  
pp. 111-115 ◽  
Author(s):  
Naoko Irie ◽  
Mariko Hiraiwa-Hasegawa ◽  
Nobuyuki Kutsukake
Keyword(s):  
Judgment Task ◽  
Numerical Competence ◽  
Asian Elephants ◽  
Numerosity Judgment
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