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J H MABRY

Publications and source records attributed to J H MABRY.

5 recordsLinked to original sources
PubMed1965

A FORTY-THREE DAY AVOIDANCE SESSION.

A single Sprague-Dawley rat was subjected to an extended discriminated avoidance session in effect continuously for over 1000 hr (43 days). The longest possible shock-free interval that the subject could obtain without responding was 5 min. Since the subject did not sleep through shock, all resting or sleeping was interrupted at least once every 5 min by either a response or a shock. Neither the experimental (avoidance) animal nor a second animal which received all shocks not avoided by the first, gave any appearance of ill effects from the protracted session.

Animals↗
PubMed1965

DISCRIMINATIVE FUNCTIONS BASED ON A DELAY IN THE REINFORCEMENT RELATION.

Pigeons were shown to come under discrimination control when the S(D) and S(Delta) were temporally separated from reinforcement and non-reinforcement. S(D) and S(Delta) consisted of distinctive key illuminations presented separately. Responding on an FR 5 in the presence of S(D) or S(Delta) produced a third stimulus containing a schedule requirement. If this third (or interpolated) stimulus was preceded by S(D), responding in its presence produced reinforcement followed by a time-out (TO). If, on the other hand, the third stimulus was preceded by S(Delta), responding produced TO alone. In this fashion, the same stimulus and the same response requirement were imposed between S(D) and the reinforcement as between S(Delta) and the TO. In Experiment I, the schedule employed during the interpolated stimulus was FR; in Experiment II, FI. Discrimination reversal was accomplished in both experiments.

Animals↗