University of Padua

Approach direction or response times? A new measure for spatial numerical association in the day-old domestic chick (Gallus gallus) Hemispheric processing of spatial numerical information

Rugani, Rosa and Regolin, Lucia (2021) Approach direction or response times? A new measure for spatial numerical association in the day-old domestic chick (Gallus gallus) Hemispheric processing of spatial numerical information. [Data Collection]

Collection description

Chicks trained to identify a target item in a sagittally-oriented series of identical items showed a higher accuracy for the target on the left, rather than that on the right, at test when the series was rotated by 90°. Such bias seems to be due to a right hemispheric dominance in visuospatial tasks. Up to now, the bias was highlighted by looking at accuracy, the measure mostly used in human studies to detect spatial numerical association, SNA. In the present study, processing by each hemisphere was assessed by scoring three variables: Accuracy, Response Times and Direction of Approach. Domestic chicks were tested under monocular vision conditions, as in the avian brain input to each eye is mostly processed by the contralateral hemisphere. Four-day-old chicks learnt to peck at the 4th element in a sagittal series of 10 identical elements. At test, when facing a left-to-right-oriented series, birds confined their responses to the visible hemifield, with high accuracy for the 4th element. The first element in the series was also highly selected, suggesting an anchoring strategy to start the proto-counting at one end of the series. In the left monocular condition, chicks approached the series starting from the left, and in the right monocular condition, they started from the right. Both hemispheres appear to exploit the same strategy, scanning the series from the most lateral element in the clear hemifield. Remarkably, there was no effect in the Response Times: equal latency was scored for correct or incorrect and for left vs. right responses. Overall, these data indicate that the measures implying a direction of choice, Accuracy and Direction of Approach, and not velocity, i.e., Response Times, can highlight SNA in this paradigm. We discuss the relevance of the selected measures to unveil SNA.

DOI: 10.25430/researchdata.cab.unipd.it.00000514
Keywords: Number cognition; Asymmetry; Hemispheric Lateralization; Mental Number Line; Spatial-Numerical Association, Response Times Domestic chick
Subjects: Life Sciences > Ecology, Evolution and Environmental Biology: Population, community and ecosystem ecology, evolutionary biology, behavioural ecology, microbial ecology > Behavioural ecology and evolution
Department: Departments > Dipartimento di Psicologia Generale (DPG)
Depositing User: Rosa Rugani
Date Deposited: 13 Jul 2021 08:21
Last Modified: 13 Jul 2021 08:21
Creators/Authors:
CreatorsEmailORCID
Rugani, Rosarosa.rugani@unipd.itorcid.org/0000-0001-5294-6306
Regolin, Lucialucia.regolin@unipd.itorcid.org/0000-0001-8960-0309
Type of data: Database
Collection period:
FromTo
20152021
Resource language: english
Metadata language: english
Publisher: Research Data Unipd
Date: 12 July 2021
Copyright holders: The Author
Last Modified: 13 Jul 2021 08:21
URI: https://researchdata.cab.unipd.it/id/eprint/514

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