Determinants of the remembered utility of aversive sounds

Retrospective evaluations of aversive episodes were studied in the context of a general model of "judgment by prototype" that has been applied in other situations. Unpleasant sounds of variable loudness and duration were the stimuli. In Experiment 1, continuous reports of annoyance closely tracked variations of noise intensity. Hypotheses about the determinants of retrospective evaluation were examined in Experiment 2. Experiment 3 confirmed a prediction of judgment by prototype: The effects of sound duration and intensity are additive in multitrial experiments. Experiment 4 confirmed a robust preference for aversive episodes that are "improved" by adding a period of reduced aversiveness.

The antiviral agents, MAP30 and GAP31, are not toxic to human spermatozoa and may be useful in preventing the sexual transmission of human immunodeficiency virus type 1

OBJECTIVE

To investigate the effects of two virucidal compounds, MAP30 (Momordica anti-human immunodeficiency virus [HIV] protein; molecular weight, 30 kd) and GAP31 (Gelonium anti-HIV protein; molecular weight, 31 kd), obtained from Momordica charantia and Gelonium multiflorum, respectively, on the motility and vitality of human spermatocytes.

DESIGN

Prospective, controlled study.

SETTING

New York University School of Medicine.

PATIENT(S)

Ten healthy men undergoing evaluation for infertility provided 10 semen specimens.

INTERVENTION(S)

Human sperm were treated with the anti-HIV agents, MAP30 and GAP3 1. Nonoxynol-9, a commonly used spermicide, and phosphate-buffered saline were used as the positive and negative controls, respectively.

MAIN OUTCOME MEASURE(S)

The motility and vitality of human spermatocytes treated with MAP30 and GAP31 at doses that inhibit HIV-1 and herpes simplex virus.

RESULT(S)

MAP30 and GAP31 did not inhibit the motility or vitality of human sperm cells over a dose range of 100-0.1 microg/mL, whereas nonoxynol-9 demonstrated spermicidal action on all 10 samples over the same dose range.

CONCLUSION(S)

The antiviral agents, MAP30 and GAP31, were not toxic to human sperm cells at the doses at which they inhibit HIV-1 and herpes simplex virus. They had no effect on the motility of spermatozoa, even at a dose of 1,000 times the maximum effective concentration. These results indicate that MAP30 and GAP31 may be useful as nonspermicidal protection against sexually transmitted diseases.

Remembering the earthquake: direct experience vs. hearing the news

Three groups of informants--two in California, one in Atlanta--recalled their experiences of the 1989 Loma Prieta earthquake shortly after the event and again 11/2 years later. The Californians' recalls of their own earthquake experiences were virtually perfect. Even their recalls of hearing the news of an earthquake-related event were very good: much higher than Atlantan recalls of hearing about the quake itself. Atlantans who had relatives in the affected area remembered significantly more than those who did not. These data show that personal involvement in the quake led to greatly improved recall, but do not show why. Many Californian informants reported low levels of stress/arousal during the event; arousal ratings were not significantly correlated with recall. The authors suggest that repeated narrative rehearsals may have played an important role.