Genetic influence on tonic immobility in chickens

Production Red chickens were selectively bred on the basis of having shown prolonged or brief immobility reactions at 21 days of age. After only one generation, there was sufficient separation between offspring to conclude that tonic immobility has an unusually large heritability component. Results were discussed in terms of their implications for an evolutionary model of animal hypnosis.     

Cue-induced transfer of CS preexposure effects across contexts

These experiments confirmed previous reports that latent inhibition effects can be abolished if rats receive CS preexposures and CS-US pairings in different contexts. However, latent inhibition effects were restored if animals were given a cuing treatment in the conditioning context prior to the conditioning trials. This restoration of latent inhibition occurred only when the cuing treatment could have served to remind the animals of CS-alone presentations in the specific context used for conditioning. These findings are discussed in relation to various accounts of latent inhibition effects.     

Values in Education in a Plural Society

This is the text of a talk given to the first conference of the Cambridgeshire Secondary Educational Trust (CSET) on 8 June 1993. Three sets of values related to the work of the educational system are distinguished (Economic, Religious and Humanistic) and the achievement of a proper balance between them is urged.