The effect of experience and of dots' density and duration on the detection of coherent motion in dogs.

摘要: Knowledge about the mechanisms underlying canine vision is far from being exhaustive, especially that concerning post-retinal elaboration. One aspect has received little attention motion perception, and in spite of common belief dogs are extremely apt at detecting moving stimuli, there no scientific support for such an assumption. In fact, we recently showed have higher thresholds than humans coherent detection (Kanizsar et al. Sci Rep UK 7:11259, 2017). This term refers to ability visual system perceive several units same direction, as one coherently global unit. Coherent perception commonly investigated using random dot displays, containing variable proportions dots. Here, relative contribution local integration changes a result repeated exposure experimental stimuli. Dogs who had been involved previous study were given conditioned discrimination task, which systematically manipulated density duration and, eventually, re-assessed our subjects' threshold after extensive Decreasing impacted on dogs' accuracy only very low values, revealing efficacy mechanisms. Density linear fashion, indicating less efficient integration. There was limited evidence improvement re-assessment but, with average 29%, detect remains much poorer humans.