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Jacky Emmerton, Annette Lohmann & Joachim Niemann. 930 Accesses. 67 Citations. Explore all metrics. Abstract. Pigeons were trained in a conditional discrimination paradigm to differentiate successively presented visual arrays according to the relative number of their elements.
- Jacky Emmerton, Annette Lohmann, Joachim Niemann
- 1997
Variations in the Ss' discrimination performance corresponded to the order of stimuli on a numerosity dimension. Serial ordering was maintained when other factors such as brightness, size, shape, area, and contour of the elements were systematically controlled across tests. (PsycINFO Database Record (c) 2017 APA, all rights reserved)
- Jacky Emmerton, Annette Lohmann, Joachim Niemann
- 1997
Stewart, 1989;Honig & Stewart, 1993).Wehaveemployed a different strategy, one ofhaving pigeons discriminate visual arrays in which numerosity is definedby the total number ofelements within a given array, but then system atically controlling for confounding parameters when new sets ofstimuli are presented to the birds.
- Jacky Emmerton, Annette Lohmann, Joachim Niemann
- 1997
[PDF] Pigeons’ serial ordering of numerosity with visual arrays | Semantic Scholar. DOI: 10.3758/BF03199062. Corpus ID: 144905937. Pigeons’ serial ordering of numerosity with visual arrays. J. Emmerton, A. Lohmann, Joachim Niemann. Published 1 June 1997. Psychology. Animal Learning & Behavior.
Emmerton, J., Lohmann, A., & Niemann, J. (1997). Pigeons’ serial ordering of numerosity with visual arrays. Animal Learning & Behavior, 25, 234–244.
- Jacky Emmerton, Jennifer C. Renner
- 2006
In three experiments, pigeons were trained to discriminate between uniform arrays of two elements that differed in color, form, or size. They were then tested with arrays that contained different proportions of the two elements on these dimensions. In all cases, orderly discrimination gradients reflected these proportions.
Abstract. A series of experiments investigated which stimulus properties pigeons use when they discriminate pairs of visual arrays that differ in numerosity. Transfer tests with novel stimuli confirmed that the birds' choices were based on relative differences in numerosity.
