One-day-old individually housed chickens were exposed to video images of an illuminated blank monitor screen (B) or a coloured, moving, complex screen saver stimulus (SS) for 5 to 10 or 30 min a day for 9 to 11 days. In experiment 1, repeated exposure to the B and SS video images led to an increasing tendency for chickens to approach the images and remain close to the monitors. In experiment 2, chickens received daily exposure for 9 days to the B or SS stimuli; they were then tested in a 2-choice situation where both video stimuli were simultaneously visible at opposite ends of an otherwise unfamiliar runway. The SS chickens quickly approached the familiar stimulus and spent much of the test period in close proximity to it, whereas the B chickens showed no preference for either stimulus. In experiment 3, chickens were repeatedly exposed to 1 of 2 moderately different complex screen saver stimuli and they were then given a choice between these stimuli in the runway. Neither group preferentially approached the familiar stimulus; in contrast the chickens spent longer near the unfamiliar image.
|Publication Title||Applied Animal Behaviour Science|
|Author Address||Roslin Institute (Edinburgh), Roslin, Midlothian EH25 9PS, UK.|
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