Catriona M. E. Ryan

Perception of object unity in chicks: A comparison with the human infant

Stephen E. G. Lea, Alan Slater, Catriona M. E. Ryan · Infant Behavior and Development · 1996 · 126 citations

Medicine, Psychology, Vision Science +10

Images of conspecifics as categories to be discriminated by pigeons and chickens: Slides, video tapes, stuffed birds and live birds

Catriona M. E. Ryan, Stephen E. G. Lea · Behavioural Processes · 1994 · 79 citations

Life Sciences, Animal Sciences, Zoology +9

A comparative analysis of the categorization of multidimensional stimuli: I. Unidimensional classification does not necessarily imply analytic processing; evidence from pigeons (Columba livia), squirrels (Sciurus carolinensis), and humans (Homo sapiens).

Andy J. Wills, Stephen E. G. Lea, Lisa A. Leaver et al. · Journal of comparative psychology · 2009 · 45 citations

Social Sciences, Behavioral Sciences, Psychology +17

Why are artificial polymorphous concepts so hard for birds to learn?

Stephen E. G. Lea, Andy J. Wills, Catriona M. E. Ryan · Quarterly Journal of Experimental Psychology · 2005 · 22 citations

Social Sciences, Psychology, Zoology +13

A comparative analysis of the categorization of multidimensional stimuli: II. Strategic information search in humans (Homo sapiens) but not in pigeons (Columba livia).

Stephen E. G. Lea, Andy J. Wills, Lisa A. Leaver et al. · Journal of comparative psychology · 2009 · 19 citations

Social Sciences, Behavioral Sciences, Psychology +16