No description available.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (B.S.)--University of Missouri, School of Mines and Metallurgy, 1911. / Discrepancy in page numbering - there is no page 5. The entire thesis text is included in file. Typescript. Illustrated by authors. Title from title screen of thesis/dissertation PDF file (viewed February 26, 2009) Includes bibliographical references (p. [ii]).

Detection threshold (DT) for electric shock under both incentive (IDT; cigarettes) and no-incentive (NIDT) conditions was determined in psychopathic and nonpsychopathic criminals and noncriminal controls (N=14 each group). A modified forced-choice procedure permitted E to vary stimulus intensity from trial to trial in an attempt to counteract boredom or inattentiveness. The use of a constant-current stimulator, a concentric electrode, and monitoring of skin/electrode impedance allowed reasonably precise control over current intensity. There were no differences between groups in NIDT or IDT, a result not consistent with previous findings of relatively high DTs in psychopaths. The result was interpreted in terms of the concept of arousal. An additional result was that IDT was lower than NIDT for all groups. Tolerance level (TL) for shock was also determined in the same groups under both no-incentive (NITL) and incentive (ITL; cigarettes) conditions. Although there was no difference between groups in NITL, psychopaths had a significantly higher ITL than the other groups. The result supported the hypothesis of relatively high stimulus tolerance in psychopaths. An additional result noted was that TL did not correlate with DT, a finding which appears consistent with evidence suggesting that the two parameters have somewhat different response determinants. / Arts, Faculty of / Psychology, Department of / Graduate

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LD2668 .T4 1966 T985 / Master of Science

Recent experimental evidence indicates that the effectiveness of posttraining electroconvulsive shock in disturbing retention is not constant but highly variable. One factor which appears to contribute to this variation is the strength of the electroshock current. Currents of higher intensity or of longer duration have generally been found to be more effective in disturbing retention. Indirectly, this evidence suggests that an electroshock treatment does not invariably stop memory consolidation. It appears that following a weak electroshock treatment, the interference with consolidation is not complete and that consolidation may continue afterwards. This possibility was directly examined in the present experiment with a one-trial passive avoidance task. The results showed that rats given one electroconvulsive shock 5 min after the passive avoidance training suffered only a slight loss of retention. However, when a second electroconvulsive shock was given at 1 hr after training, there was a significantly greater retention loss than that following one electroconvulsive shock at 5 min or at 1 hr. Additional results indicate that the disruptiveness of the second electroconvulsive shock is time-dependent and that the retention deficit does not appear to be due to punishing or disinhibitory effects of the electroconvulsive shocks. These findings are interpreted as indicating that memory consolidation can continue after electroconvulsive shock. / Arts, Faculty of / Psychology, Department of / Graduate

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No description available.