Colour categorization by domestic chicks.
AUTOR(ES)
Jones, C D
RESUMO
Spectral stimuli form a physical continuum, which humans divide into discrete non-overlapping regions or categories that are designated by colour names. Little is known about whether non-verbal animals form categories on stimulus continua, but work in psychology and artificial intelligence provides models for stimulus generalization and categorization. We compare predictions of such models to the way poultry chicks (Gallus gallus) generalize to novel stimuli following appetitive training to either one or two colours. If the two training colours are (to human eyes) red and greenish-yellow or green and blue, chicks prefer intermediates, i.e. orange rather than red or yellow and turquoise rather than green or blue. The level of preference for intermediate colours implies that the chicks interpolate between the training stimuli. However, they do not extrapolate beyond the limits set by the training stimuli, at least for red and yellow training colours. Similarly, chicks trained to red and blue generalize to purple, but they do not generalize across grey after training to the complementary colours yellow and blue. These results are consistent with a modified version of a Bayesian model of generalization from multiple examples that was proposed by Shepard and show similarities to human colour categorization.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1088851Documentos Relacionados
- Fruit or aposematic insect? Context-dependent colour preferences in domestic chicks.
- Memory consolidation of one-trial learning in chicks.
- Metabolic effects of low aflatoxin B1 levels on broiler chicks.
- Bacteria isolated from the duodenum, ileum, and cecum of young chicks.
- Inhibitory action of galactose on phagocytes from normal and hypergalactosemic chicks.