| Abstract: | Describes 3 experiments with cornish * white ruck or white comet * New Hampshire red newly hatched chicks. In Exp. I, it was demonstrated that 12 Ss fed communally gained more weight during a test period than 12 Ss fed in isolation. This effect seemed more pronounced in Ss reared communally. Exp. II showed that 30 communally reared Ss ate very much more, as measured by weight gain, than 30 isolated Ss, but if communal experience was started after Day 3 of life this effect was not observed. However, communally reared Ss that were placed in isolation after Day 3 continued to gain weight at the same rate as those remaining in community. In Exp. III, with 24 Ss, it was found that brief exposures to an artificial imprinting stimulus in the 1st 3 days of life also had a marked facilitating effect on eating in a communal test situation. (French summary) (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
