Comparing latent distributions

We consider the problem of comparingm latent population distributions when the observed values are scores on a test battery with binary items. The latent densities are assumed to be normal densities, and we consider a test for equality of the means as well as a test equality of the variances. In addition, we consider a longitudinal model, where the test battery has been applied to the same individuals at different points in time. This model allows for correlations between the latent variable at different time points, and methods are discussed for estimating the correlation coefficient.This work was supported in part by a grant from the Danish Social Science Research Council.     

The effect of strength of cognitive linkages on attitude change in a communication situation

Implicitly or explicitly, linkage is a basic concept in all theories of cognitive consistency — consistency or inconsistency can exist only with reference to entities which are cognitively linked through association or dissociation. The nature of cognitive linkages has not been systematically studied, but it seems evident that they may vary in many ways. One is the strength or intensity of perceived relationship between cognitive entities. The basic hypothesis in the present two experiments was that the effect of a communication in terms of attitude change would depend on the strength of linkage between concepts mentioned in the message. Results show no such effect when strength was manipulated through combination of linkages, whereas the hypothesis was confirmed when linkage strength was varied semantically. Also, previous studies on direct and mediated generalization of attitude change towards consistency were successfully replicated. Finally, it was found that amount of attitude change towards consistency was significantly higher for linkages involving affect (L-relations) than for linkages simply expressing unit formation (U-relations).     

Mindfulness Based Flourishing Program: A Cross-Cultural Study of Hong Kong Chinese and British Participants

The Mindfulness Based Flourishing Program (MBFP) is an online 8-week intervention developed for enhancing wellbeing with the use of mindfulness practices, through targeting a range of positive variables. The efficacy of the MBFP has been demonstrated in a randomized controlled trial, and in order to further establish it as an intervention with widespread application, cross-cultural validation is warranted. The current study was conducted with the primary aim of testing the validity of the MBFP with a Hong Kong Chinese population, as well as verifying its positive effects. A randomized wait-list controlled design was adopted with 115 participants (92 females, mean age = 31.50). Intervention outcomes were compared between Hong Kong Chinese and British participants. Five positive variables were examined (self-compassion, meaning in life, positive and negative emotions, gratitude, and mindfulness), and measures were taken pre- and post-intervention. Significant gains in wellbeing measures were observed in both the Hong Kong Chinese and the British experimental groups. Levels of wellbeing post-intervention were also higher for the two experimental groups as compared to their control counterparts. The current study provides preliminary evidence for the MBFP’s cross-cultural validity, and strengthens previous claims for its efficacy as a new, accessible alternative for enhancing wellbeing.     

Problems with prioritization: exploring ethical solutions to inequalities in HIV care

Enormous gaps between HIV burden and health care availability in low-income countries raise severe ethical problems. This article analyzes four HIV-priority dilemmas with interest across contexts and health systems. We explore principled distributive conflicts and use the Atkinson index to make explicit trade-offs between health maximization and equality in health. We find that societies need a relatively low aversion to inequality to favor treatment for children, even with large weights assigned to extending the lives of adults: higher inequality aversion is needed to share resources equally between high-cost and low-cost treatment; higher inequality aversion is needed to favor treatment rather than prevention, and the highest inequality aversion is needed to favor sharing treatment between urban and rural regions rather than urban provision of treatment. This type of ethical sensitivity analysis may clarify the ethics of health policy choice.     

Beyond artificial, sex-linked distinctions to conceptualize female sexuality: comment on Baumeister (2000)

The authors comment on three aspects of R. F. Baumeister's (2000) theoretical article on female sexuality. Questioning the predominance of nature versus cultural factors in accounting for sexual outcomes for men and women, the authors draw attention to the similarities (as opposed to differences) in the sexual attitudes, behaviors, and responses of men and women, and directly question the suggestion of "controlling" women's sexual attitudes, behaviors, responses, etc. to meet social needs for change.     

Genetic and environmental influences on mothering of adolescents: a comparison of two samples

This study examined 2 samples of adolescents and mothers using a child-based design (Nonshared Environment in Adolescent Development [NEAD] project, N = 395 families) and a parent-based design (Twin Moms [TM] project, N = 236 twin family pairs) to compare genetic and environmental influences on mothering. For both samples, the same measures of positivity, negativity, control, and monitoring were used. The use of matched child-based and parent-based samples enabled passive and nonpassive genotype-environment (GE) correlations to be approximated, providing information about process. Passive GE correlations were suggested for mother's positivity and monitoring. For mother's negativity and control, primarily nonpassive GE correlations were suggested. In several cases, both types of GE correlation were indicated. Finally, observer ratings of negativity and monitoring were influenced only by environmental factors.     

Poverty and experiences of social devaluation: a qualitative interview study of 25 long-standing recipients of social security payments

The purpose of this study is to explore experiences of social devaluation among people living in poverty. Twenty-five long-standing recipients of social security payments living in a city in Norway were interviewed. Most felt that people in their environment held low opinions of them regarding issues related to personality and moral integrity. Several factors play a role in the formation of such beliefs or assumptions: (a) impressions of prevailing views of the social category "the poor" and observations concerning devaluation of that category; (b) knowledge others are assumed to possess of the respondents' financial predicament; (c) perception of own social situation; (d) undesired behavior that signals low social status and low esteem; (e) actions by others that signal devaluation. Social devaluation is also experienced at the affective level: the sense of shame and guilt is widespread.     

Assessing stress in cancer patients: a second-order factor analysis model for the Perceived Stress Scale

Using the Perceived Stress Scale (PSS), perceptions of global stress were assessed in 111 women following breast cancer surgery and at 12 and 24 months later This is the first study to factor analyze the PSS. The PSS data were factor analyzed each time using exploratory factor analysis with oblique direct quartimin rotation. Goodness-of-fit indices (root mean square error of approximation [RMSEA]), magnitude and pattern of factor loadings, and confidence interval data revealed a two-factor solution of positive versus negative stress items. The findings, replicated across time, also indicate factor stability. Hierarchical factor analyses supported a second-order factor of "perceived stress." This alternative factor model of the PSS is presented along with observations regarding the measure's use in cancer research.     

The discrimination of heading from optic flow is not retinally invariant

Three experiments were conducted to determine whether the discrimination of heading from optic flow is retinally invariant and to determine the importance of acuity in accounting for heading eccentricity effects. In the first experiment, observers were presented with radial flow fields simulating forward translation through a three-dimensional volume of dots. The flow fields subtended 10° of visual angle and were presented at 0°, 10°, 20°, and 40° of retinal eccentricity. The observers were asked to indicate whether the simulated movement was to the right or the left of a target that appeared at the end of the display sequence. Eye movements were monitored with an electrooculogram apparatus. In a second experiment, static acuity thresholds were derived for each of the observers at the same retinal eccentricities. There was a significant increase in heading detection thresholds with retinal eccentricity (from 0.92° at 0° retinal eccentricity to 3.47° at 40°). An analysis of covariance indicated that the variation in sensitivity to radial flow, as a function of retinal eccentricity, is independent of acuity. Similar results were obtained when the Vernier acuity of observers was measured. These results suggest that the discrimination of heading from radial flow is not retinally invariant.