caa a22 4500 605542228 CHVBK 20210128100920.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s10071-015-0865-1 doi (NATIONALLICENCE)springer-10.1007/s10071-015-0865-1 Re-evaluating birds' ability to detect Glass patterns [Elektronische Daten] [Jean-François Nankoo, Christopher Madan, Douglas Wylie, Marcia Spetch] Glass patterns (GPs) are static stimuli that consist of randomly positioned dot-pairs that are spatially integrated to create the perception of a global form. However, when multiple independently generated static GPs are presented sequentially (termed ‘dynamic' GP), observers report a percept of coherent motion, and data show an improvement in sensitivity. This increased sensitivity has been attributed to a summation of the form signals provided by the individual GPs. In Experiment 1, we tested whether pigeons also show a heightened sensitivity to dynamic GPs. Our results show that pigeons are significantly better at learning to discriminate dynamic GPs from noise compared with static GPs. However, in contrast to previous research, we found that pigeons did not perform well enough with our static GPs to extract sensitivity measurements. In Experiment 2, we compared our static GPs to those that have been used previously. We show that the difference in the comparison noise patterns is important. We used dipole noise patterns, while previous studies used uniform noise patterns that differ in mean dot spacing to the S+. We argue that prior findings from the use of GPs in pigeons should be re-evaluated using dynamic GP stimuli with noise that consist of dipoles. Springer-Verlag Berlin Heidelberg, 2015 Visual perception nationallicence Form perception nationallicence Columba livia nationallicence Glass pattern nationallicence Global form nationallicence Nankoo Jean-François Department of Psychology, University of Alberta, P217 Biological Sciences Bldg, T6G 2E9, Edmonton, AB, Canada aut Madan Christopher Department of Psychology, University of Alberta, P217 Biological Sciences Bldg, T6G 2E9, Edmonton, AB, Canada aut Wylie Douglas Department of Psychology, University of Alberta, P217 Biological Sciences Bldg, T6G 2E9, Edmonton, AB, Canada aut Spetch Marcia Department of Psychology, University of Alberta, P217 Biological Sciences Bldg, T6G 2E9, Edmonton, AB, Canada aut Animal Cognition Springer Berlin Heidelberg 18/4(2015-07-01), 945-952 1435-9448 18:4<945 2015 18 10071 https://doi.org/10.1007/s10071-015-0865-1 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/s10071-015-0865-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nankoo Jean-François Department of Psychology, University of Alberta, P217 Biological Sciences Bldg, T6G 2E9, Edmonton, AB, Canada aut NATIONALLICENCE 700 1- Madan Christopher Department of Psychology, University of Alberta, P217 Biological Sciences Bldg, T6G 2E9, Edmonton, AB, Canada aut NATIONALLICENCE 700 1- Wylie Douglas Department of Psychology, University of Alberta, P217 Biological Sciences Bldg, T6G 2E9, Edmonton, AB, Canada aut NATIONALLICENCE 700 1- Spetch Marcia Department of Psychology, University of Alberta, P217 Biological Sciences Bldg, T6G 2E9, Edmonton, AB, Canada aut NATIONALLICENCE 773 0- Animal Cognition Springer Berlin Heidelberg 18/4(2015-07-01), 945-952 1435-9448 18:4<945 2015 18 10071