Metamemories of memory researchers

In the present study, a metamemory questionnaire was completed by three groups of individuals: memory research psychologists who attended a small international convention on everyday memory processes in the aged, academic psychologists with a limited knowledge of the memory literature, and nonpsychologist college professors. There was little evidence that memory psychologists reported using strategies to remember things that were different from the strategies of other academics. The most used and most recommended technique for remembering was to write things down, followed by general internal mnemonic systems such as organization and rehearsal. The least used and least recommended strategies for all three groups were formal mnemonic systems, such as the peg-word system or the method of loci.     

Defeat-induced hypoalgesia in the rat: effects of conditioned odors, naltrexone, and extinction

In Experiment 1, male rats were either defeated as a colony intruder by alpha conspecifics or had no defeat experience, and 24 hr later they were given a paw injection of formalin prior to observational tests with or without alpha-colony odors. The combination of defeat and tests with these odors produced conditioned hypoalgesia (i.e., a suppression in paw licking) and freezing. In Experiment 2, defeated rats were given either an injection of naltrexone or saline prior to defeat and 24 hr later prior to testing. An injection of naltrexone prior to defeat increased freezing during defeat and later testing. In contrast, naltrexone during testing did not affect freezing but significantly reduced hypoalgesia. In Experiment 3, a 12-hr exposure session with alpha-colony odors extinguished hypoalgesia in previously defeated rats. These findings are discussed in terms of associative, opioid/nonopioid, and adaptive evolutionary processes.     

“Single white male looking for thin,very attractive...”

Sociocultural pressures on women to be thin and physically attractive assume many forms today. When these external pressures are combined with the excessive demands many women already place on themselves in these areas, chronic dieting, and ultimately binge eating, often result (Agras & Kirkley, 1986; Hsu, 1989). The present study investigated the extent to which single women currently were receiving the message that physical attractiveness in general, and weight in particular, were crucial factors in being selected as a dating partner. A total of 283 male and 231 female personal ads from a singles' magazine were examined. Twenty-eight categories were created to label the qualities designated as desirable in a partner. As predicted, physical attractiveness was the characteristic most frequently sought by males (56.9%). Significantly fewer females (26.4%) required this in a prospective partner. Furthermore, requests for a thin partner were made by significantly more males (33.6%) than females (2.2%). Sex differences also were detected for the quality sought most often by females: interpersonal understanding. The results demonstrated that males still attributed greater importance to physical attractiveness and thinness than did females when selecting a date. Possible explanations for these different emphases were offered, and features that distinguished the “physical attractiveness” seekers from others were explored. The link with today's high rate of eating disorders among women was reappraised.     

Recovery of structure and function following transection of the primary olfactory nerves in pigeons.

Preliminary experimentation on ring doves to ascertain whether they might regulate any aspects of their reproductive behavior in terms of olfactory cues was vitiated by the discovery that their sectioned olfactory nerves had apparently regenerated. Concurrent work on frogs has shown that the olfactory receptors degenerate after axotomy and are replaced by new ones. This phenomenon was studied in pigeons. All transected nerves were found to be healed. Electrical recording from the regenerated nerves revealed apparently normal receptor function and, indirectly, autonomic reflex responsiveness. Previously untrained pigeons learned an olfactory discrimination after reconstitution of the peripheral olfactory system using a conditioned suppression procedure. The olfactory nerves of trained pigeons were sectioned and the behavioral response recovered within 16-82 days. The gross sizes of primary olfactory nerves and olfactory bulbs were frequently much less than those of controls, but on the ultrastructural level there was no recognizable morphological deficiency in the receptor cellular organelles or terminal synaptic contacts in bulbar glomeruli. Recent results by other workers indicate that pigeons utilize olfactory cues in homing performance.     

Avoidance conditioning with shock contingent upon the avoidance response

Rats learned either a lever-press response, a shuttle response or a one-way crossing response, which produced one immediate shock but was instrumental in avoiding five identical shocks scheduled to occur later. These responses were acquired both with and without support of an escape contingency. These results support shock-frequency reduction as a sufficient condition for the acquisition and maintenance of avoidance.