A re-examination of local contrast in multiple schedules

Pigeons were presented with multiple schedules of alternating 90-sec components. When components in which grain was never presented alternated with components in which grain was presented on a variable-interval schedule, the average rate of responding in the variable-interval components increased, showing overall positive behavioral contrast. Unlike previous reports, this study found that the response rates for all birds increased toward the end of the variable-interval components as training proceeded. This increase in local response rate disappeared when the multiple schedule was composed solely of variable-interval components and reappeared when the variable-interval components were again alternated with extinction. This finding cannot be predicted or explained by recent theories of behavioral contrast based on autoshaping, and thus questions their sufficiency. We suggest that this local response-rate increase results from the predictable change from high to low density of reinforcement at the end of the fixed-duration component. Thus, the present effect apparently illustrates a different type of interaction between components of a multiple schedule than that described by previous theories of contrast. In a given procedure, either or both types of interaction may occur; neither provides a complete account of behavioral contrast.     

The verbal label: Mediator or classifier?

Three experiments on the role of verbal labels and perceptual cues in concept attainment are reported. Ss were kindergarten and second-grade upper-middle-class children. The results indicated that when Ss learned to associate two labels (or two perceptual cues) with each stimulus no positive transfer resulted, despite the fact that one of the labels (or cues) was relevant to solution. When one label only (or one perceptual cue) was associated with each stimulus, substantial positive transfer was observed. The effects of verbal labeling and perceptual cuing were identical.On the basis of these finding the authors reject the hypothesis that labels give rise to representational responses which act as mediators, and instead propose a new hypothesis, that labels and perceptual cues facilitate performance because they facilitate the division of the stimulus set into subsets which are correlated with the response systems the subjects are expected to learn.     

Status reporting of "eyes on" and peripheral displays during tracking

In response to external requests, pilots often orally report status information read from scattered visual displays while simultaneously controlling an aircraft. For an experimentally controlled "status-reporting" task, we found that the input frequency on a concurrent-tracking task and the task stream-related factors of the rate, uncertainty, and timing of requests showed few significant effects on mean performance times and standard deviations. Tracking performance did vary greatly between the different phases of the "status-reporting" task, the different types of displays and their locations, and the different tracking-input frequencies. An elementary manual control model produced conformal tracking error means and standard deviations when parameters corresponding to behavioral changes were varied. These results indicated that both the performance time statistics of the "status-reporting" task and the influence of concurrent performance on tracking error can be estimated using simple methods.     

Repetition priming in simple addition depends on surface form and typicality

Repetition priming and recognition memory for numbers were measured in four experiments using single-digit addition. Results of the first two experiments indicate that when numbers were presented as number words and dot configurations, preexposure of the same problem in the same notation produced greater reaction-time benefit than did preexposure of the same problem in Arabic-digit notation. In contrast, when numbers were presented as Arabic digits, preexposure of the same problem in Arabic digit, number word, and dot notation produced the same amount of priming. In the third experiment, priming was shown to be greatest, for all three notations, when the task performed on preexposure trials (addition or multiplication) matched the task performed on repetition trials (addition). Results of the fourth experiment, measuring recognition memory, were comparable to the priming results in the sense that memory was superior when notation matched across repetitions if the test involved number words and dot configurations but not Arabic digits. These data are interpreted in terms of models of numerical cognition, and they support the hypothesis that the influence of surface form on repetition priming depends on the typicality of the input for the task.     

Personal Values and Behavior: Taking the Cultural Context into Account

Taking a cross-cultural perspective, we review recent advancement in theory and empirical research on the relationships between personal values and behavior. Although personal values have been examined in many studies, systematic, theory-based, cross-cultural comparisons of the relations of personal values and behavior are rare. In this review, we offer suggestions for research within an integrative perspective that links culture, personal values, and behavior. People from different cultures vary in the extent to which they use their internal attributes to guide their behavior. Thus, the strength of the relationships between values and behavior differs across cultural groups. Culture also moderates the relationships between values and behavior by determining the repertoire of normative behaviors. Culture determines the meaning of behavior, so that seemingly similar behaviors may have different meanings in different cultures. Finally, we discuss the possible effect of the increasing heterogeneity of society on the relationship of values and behavior.     

Postpartum feeding attitudes, maternal depression, and breastfeeding in Barbados

Maternal feeding attitudes, maternal moods and infant feeding practices during the first 6 months postpartum were assessed in 226 healthy, well-nourished Barbadian mother-infant dyads. Factor analysis of the feeding attitudes questionnaire resulted in six independent factors. The belief that breastfeeding was better than bottle-feeding was associated with higher family income, more information seeking behavior and older maternal age at the time of her first pregnancy. Women who believed that breastfeeding was better at 7 weeks postpartum were also more likely to breastfeed at concurrent and later ages, up to 6 months postpartum. This belief was also associated with less maternal depression at 7 weeks and 6 months. The association between feeding attitudes and actual feeding practices was significant even after correcting for maternal moods and other background variables. Conversely, after controlling for feeding attitudes, maternal mood at 7 weeks was still significantly associated with infant feeding practices at 6 months. Thus, feeding attitudes and maternal moods were closely linked, but each contributed independently and uniquely to different aspects of breastfeeding, especially at 6 months. These findings suggest that early intervention addressing maternal feeding attitudes, may improve the extent of breastfeeding and the health of children in this setting.     

Building Interdisciplinary/Intersectoral Research Partnerships for Community-Based Mental Health Research with Older Minority Adults

Community-based research often brings investigators from different disciplinary backgrounds together with community representatives to conduct research on topics of mutual concern. This paper describes a case example that illustrates an interdisciplinary/intersectoral study of depression and barriers to mental health care among older adults and illustrate the factors central to implementing a successful research partnership. It will address the following conditions that facilitate and challenge interdisciplinary/intersectoral research: (1) achieving commonality of purpose in study design and research and referral approaches; (2) ensuring the ability to develop, field-test and implement psychometrically rigorous and culturally and qualitatively appropriate instruments; (3) building effective management structures for interdisciplinary/intersectoral research partnerships; and (4) identifying, training and supporting qualified researchers to carry out a mental health study with older ethnically diverse adults. The paper concludes with strengths and limitations of the approach.     

The paradox of group-based guilt: modes of national identification, conflict vehemence, and reactions to the in-group's moral violations

The authors examined the relationships between 2 modes of national identification (attachment to the in-group and the in-group's glorification) and reactions to the in-group's moral violations among Israeli students. Data were collected during a period of relative calm in the Israeli-Palestinian conflict as well as during a period of great intensification of this conflict. As expected, in Study 1, the 2 modes of identification had contrasting relationships with group-based guilt: Attachment was positively related whereas glorification was negatively related to group-based guilt for in-group's past infractions. Glorification suppressed the attachment effect but not vice versa. Both relationships were mediated by the use of exonerating cognitions. In Study 2, group-based guilt for the in-group's current wrongdoings was increased by priming critical rather than conventional attachment to the in-group, suggesting a causal effect of mode of identification on the experience of negative group-based emotions.