Contrast effects in flavour preference learning

In four experiments the role of contrast effects in producing learned flavour preferences was examined. The experiments showed that contrast effects are pervasive in flavour preference learning, producing results that are often paradoxical from a traditional reinforcement point of view. In Experiment 1, rats preferred a reinforced flavour over a nonreinforced flavour more if the reinforcer was 1% sucrose than if the reinforcer was 8% sucrose. Because the cue flavour was dissolved in 8% sucrose, this represents an anticipatory positive contrast effect. In Experiment 2, the relationship between cue and consequence was shown to be important in flavour preference learning, as expected if contrast effects are involved. In Experiment 3, rats preferred a flavour that was reinforced 4 times, and they preferred this flavour more than one reinforced 8 times, presumably because the greater the expectancy of the consequence, the greater the anticipatory negative contrast. In Experiment 4, rats consumed less of 0.15% saccharin if they received 32% sucrose randomly 90 min either before or after the 0.15% saccharin than if they received only 0.15% saccharin, a simultaneous negative contrast effect.     

WOMEN AND POWER Definition, Dualism, and Difference

This article reviews the discussions of power and of women and power in United States psychology. Although the field has had difficulty dealing with power, feminist psychology has focused attention on the topic and has advanced the discussion significantly. There are three problems in the literature: definition; person/society dualism; and the need to deal with race, ethnicity, class, sexuality, and other social differences besides gender. This article describes components needed for a good definition, criticizes the reduction of power to two modes, and discusses issues involved in improving the analysis of social differences and moving towards resolving person/society dualism. Several nondualistic concepts and potentially useful directions are proposed.     

Life Satisfaction and Symptoms of Mental Disorder Among Older African American Public Housing Residents

This study examines life satisfaction and symptoms of mental disorder in a sample of 831 older African American residents of urban public housing developments. Symptoms of mental disorder included measures of emotional distress, alcohol-related problems, and cognitive impairment. Subjects reporting less life satisfaction had significantly greater emotional distress. Neither lifetime alcohol-related problems nor cognitive impairment were significantly related to life satisfaction. Stepwise multiple regression analyses indicated that emotional distress subscales accounted for most of the explained variance in life satisfaction. Social dysfunction was the strongest predictor of life satisfaction, accounting for 17% of the variance. Having a confidant, instrumental social support, religious support, or being female also contributed to the explained variance in life satisfaction.     

PROMOTING LOW-FAT ENTREE CHOICES IN A PUBLIC CAFETERIA

Reductions in dietary fat have been recommended in the prevention of coronary heart disease. Because entrees contribute substantially to total meal fat content, we evaluated a cafeteria-based intervention for increasing the purchase rate of low-fat entrees (M = 6.83 g) relative to nonlowfat entrees (M = 25.59 g). The intervention included a poster listing the benefits of a LF diet and the daily LF entrees (i.e., broiled or baked chicken and fish dishes). During 6 days per phase, food selections (N = 3,264) were monitored by trained observers. The intervention, which cost $80.00, produced significant increases (i.e., from 20% to 35%) in the purchase rate of LF entrees.     

SEX-ROLE IDENTITY, GENDER IDENTITY, AND SELF-SCHEMATA

Forty females and 40 males were shown slides of masculine and feminine phrases controlled for social desirability, sex-linked content, syllable length, and negative semantic construction to evaluate schematic processing on the dimensions of masculinity and femininity. Their responses to the phrases were timed. The BSRI, PAQ, and SSR1Q administered subsequent to the slide presentation were used to categorize subjects into groups of masculine, feminine, androgynous, and undifferentiated. Comparisons between the groups evaluated by the different scales indicated that the PAQ was the best predictor of schematic processing and that the SSRIQ and gender were not predictors of schematic processing. Correlations between the SSRIQ and the masculine and feminine scales of the BSRI and PAQ provided evidence partially supportive of Storms's (1979) theory that sex-role identity influences the development of same-sex-typed attributes but does not influence opposite-sex-typed attributes.     

Computing: Is it a better mousetrap?

In the spring of 1983, Drexel University announced that all incoming freshmen the following fall would be required to have access to a personal computer being designed by Apple. This paper reports on the impact of that decision over the next 2 years.