caa a22 4500 605542686 CHVBK 20210128100922.0 cr unu---uuuuu 210128e20150301xx s 000 0 eng 10.1007/s10071-014-0821-5 doi (NATIONALLICENCE)springer-10.1007/s10071-014-0821-5 The Ebbinghaus illusion in a fish ( Xenotoca eiseni ) [Elektronische Daten] [Valeria Sovrano, Liliana Albertazzi, Orsola Rosa Salva] The tendency of fish to perceive the Ebbinghaus illusion was investigated. Redtail splitfins (Xenotoca eiseni, family Goodeidae) were trained to discriminate between two disks of different sizes. Then, fish were presented with two disks of the same size surrounded by disks of large or small size (inducers) arranged to produce the impression (to a human observer) of two disks of different sizes (in the Ebbinghaus illusion, a central disk surrounded by small inducers appears bigger than an identical one surrounded by large inducers). Fish chose the stimulus that, on the basis of a perception of the Ebbinghaus illusion, appeared deceptively larger or smaller, consistent with the condition of training. These results demonstrate that redtail splitfins tend to perceive this particular illusion. The results are discussed with reference to other related illusions that have been recently observed to be experienced by fish (such as the Navon effect), and with regard to their possible evolutionary implications. Springer-Verlag Berlin Heidelberg, 2014 Visual perception nationallicence Visual illusions nationallicence Ebbinghaus illusion nationallicence Titchener circles nationallicence Fish nationallicence Sovrano Valeria Center for Mind/Brain Sciences (CIMeC), University of Trento, C.so Bettini 31, 38068, Rovereto, Trento, Italy aut Albertazzi Liliana Center for Mind/Brain Sciences (CIMeC), University of Trento, C.so Bettini 31, 38068, Rovereto, Trento, Italy aut Rosa Salva Orsola Center for Mind/Brain Sciences (CIMeC), University of Trento, C.so Bettini 31, 38068, Rovereto, Trento, Italy aut Animal Cognition Springer Berlin Heidelberg 18/2(2015-03-01), 533-542 1435-9448 18:2<533 2015 18 10071 https://doi.org/10.1007/s10071-014-0821-5 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/s10071-014-0821-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sovrano Valeria Center for Mind/Brain Sciences (CIMeC), University of Trento, C.so Bettini 31, 38068, Rovereto, Trento, Italy aut NATIONALLICENCE 700 1- Albertazzi Liliana Center for Mind/Brain Sciences (CIMeC), University of Trento, C.so Bettini 31, 38068, Rovereto, Trento, Italy aut NATIONALLICENCE 700 1- Rosa Salva Orsola Center for Mind/Brain Sciences (CIMeC), University of Trento, C.so Bettini 31, 38068, Rovereto, Trento, Italy aut NATIONALLICENCE 773 0- Animal Cognition Springer Berlin Heidelberg 18/2(2015-03-01), 533-542 1435-9448 18:2<533 2015 18 10071