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Biomedical subjects

E H HESS

Publications and source records attributed to E H HESS.

18 recordsLinked to original sources
PubMed1964

IMPRINTING IN AN ALTRICIAL BIRD: THE BLOND RING DOVE (STREPTOPELIA RISORIA).

Newborn ring doves were taken away from their parents when they were from 4 to 14 days old. They were then either raised by hand in complete visual isolation from other members of their species or placed in a community cage after weaning. They were tested as adults in a free-choice situation between human beings and ring doves. An optimum period for imprinting was found when they were about 7 to 9 days old. The controls showed that subsequent experiences during the life span of a bird also have an effect on the choice of a mate, and, in this species, imprinting can be said to be reversible.

Animals↗
PubMed1964

FOLLOWING AND IMPRINTING: EFFECTS OF LIGHT AND SOCIAL EXPERIENCE.

Ninety-six Vantress broiler chicks were used in two studies of the effects of light and social experience on the "following" response. In addition, the animals used in one study were later tested to determine the amount of imprinting during following. The difference between the behavior of these animals and animals maintained in isolation and in darkness prior to exposure to a model, indicate that variability in treatment can influence the following behavior, and that following in itself cannot be equated with imprinting.

Animals↗
PubMed1960

Pupil size as related to interest value of visual stimuli.

Increases in the size of the pupil of the eye have been found to accompany the viewing of emotionally toned or interesting visual stimuli. A technique for recording such changes has been developed, and preliminary results with cats and human beings are reported with attention being given to differences between the sexes in response to particular types of material.

Animals↗