Individual differences during the development of the domestic chick's attraction toward intermittent light

Stable and persisting differences occur in the domestic chick's attraction toward normally preferred rates of intermittent white light in the vicinity of 4 flashes per second during the period around hatching when this preference develops. These differences are not linked to fluctuations in the test environment, high levels of indiscriminate responding toward flicker in those most attracted, the presence of an alternate rate preference in those least attracted, or to differences among chicks in arousal level or locomotor ability.