caa a22 4500 605542627 CHVBK 20210128100922.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s10071-015-0868-y doi (NATIONALLICENCE)springer-10.1007/s10071-015-0868-y Relative versus absolute numerical representation in fish: Can guppies represent "fourness”? [Elektronische Daten] [Maria Miletto Petrazzini, Christian Agrillo, Vèronique Izard, Angelo Bisazza] In recent years, the use of operant conditioning procedures has shown that species as diverse as chimpanzees, honeybees, and mosquitofish can be trained to discriminate between sets containing different numbers of objects. However, to succeed in this task, subjects can use two different strategies: either select the array containing a specific number of items (an absolute numerosity rule), or select the set containing the larger (or smaller) quantity of items (a relative numerosity rule). In the latter case, subjects need not only be able to judge whether two numerosities are equal or different but also be able to order numerosities. Here, in two experiments, we address whether fish can perform both kinds of judgment by training them with specific numerosities and testing their generalization to new numerosity contrasts. In Experiment 1, subjects were initially trained to select between visual arrays of 6 and 12 shapes, and were then tested with a contrast pairing the previously trained numerosity (either 6 or 12) with a novel numerosity (respectively, 3 or 24). Spontaneously, subjects selected the novel numerosity, in accordance with a relative numerosity rule. The second experiment tested whether guppies can also learn to select one specific number against all others, if appropriately trained. Fish trained to select an array of 4 shapes against several alternatives (4 vs. 1, 4 vs. 2, 4 vs. 8, 4 vs. 10) learned to recognize the number 4 against all alternatives and proved able to generalize their discrimination to novel, more difficult contrasts (4 vs. 3 and 4 vs. 6 items). In summary, although guppies preferentially opt for relative comparisons, they can flexibly learn either relative or absolute decision criteria on numerosity stimuli, depending on the context. Springer-Verlag Berlin Heidelberg, 2015 Numerical discrimination nationallicence Approximate number system nationallicence Poecilia reticulata nationallicence Miletto Petrazzini Maria Dipartimento di Psicologia Generale, Università di Padova, Via Venezia 8, 35131, Padova, Italy aut Agrillo Christian Dipartimento di Psicologia Generale, Università di Padova, Via Venezia 8, 35131, Padova, Italy aut Izard Vèronique Laboratoire Psychologie de la Perception, Université Paris Descartes, Sorbonne Paris Cité, 75006, Paris, France aut Bisazza Angelo Dipartimento di Psicologia Generale, Università di Padova, Via Venezia 8, 35131, Padova, Italy aut Animal Cognition Springer Berlin Heidelberg 18/5(2015-09-01), 1007-1017 1435-9448 18:5<1007 2015 18 10071 https://doi.org/10.1007/s10071-015-0868-y text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10071-015-0868-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Miletto Petrazzini Maria Dipartimento di Psicologia Generale, Università di Padova, Via Venezia 8, 35131, Padova, Italy aut NATIONALLICENCE 700 1- Agrillo Christian Dipartimento di Psicologia Generale, Università di Padova, Via Venezia 8, 35131, Padova, Italy aut NATIONALLICENCE 700 1- Izard Vèronique Laboratoire Psychologie de la Perception, Université Paris Descartes, Sorbonne Paris Cité, 75006, Paris, France aut NATIONALLICENCE 700 1- Bisazza Angelo Dipartimento di Psicologia Generale, Università di Padova, Via Venezia 8, 35131, Padova, Italy aut NATIONALLICENCE 773 0- Animal Cognition Springer Berlin Heidelberg 18/5(2015-09-01), 1007-1017 1435-9448 18:5<1007 2015 18 10071