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Color guides many important behaviors in birds. Previously we have shown that the intensity threshold for color discrimination in the chicken depends on the color contrast between stimuli and their brightness. The birds could discriminate larger color contrasts and brighter colors in lower light intensities. We suggested that chickens use spatial summation of cone signals to maintain color vision...
Work by our group and others employed the within-participants variability in peak grip aperture as a ‘just-noticeable-difference’ (JND) in grasping. Notably, our group reported that grasping responses with decoupled spatial relations between stimulus and response (i.e., pantomime-grasping) produced JNDs that increased linearly with increasing target object size (i.e., adherence to Weber’s law) and...
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