Stress-Strength Reliability of a Two-Parameter Bathtub-shaped Lifetime Distribution Based on Progressively Censored Samples

Based on progressively Type-II censored samples, this article deals with inference for the stress-strength reliability R = P(Y < X) when X and Y are two independent two-parameter bathtub-shape lifetime distributions with different scale parameters, but having the same shape parameter. Different methods for estimating the reliability are applied. The maximum likelihood estimate of R is derived. Also, its asymptotic distribution is used to construct an asymptotic confidence interval for R. Assuming that the shape parameter is known, the maximum likelihood estimator of R is obtained. Based on the exact distribution of the maximum likelihood estimator of R an exact confidence interval of that has been obtained. The uniformly minimum variance unbiased estimator are calculated for R. Bayes estimate of R and the associated credible interval are also got under the assumption of independent gamma priors. Monte Carlo simulations are performed to compare the performances of the proposed estimators. One data analysis has been performed for illustrative purpose. Finally, we will generalize this distribution to the proportional hazard family with two parameters and derive various estimators in this family.     

Attachment Relationships and Psychological Adjustment of Married Adults

The present study explored relations among remembered parental (paternal and maternal) acceptance in childhood, spouse acceptance and psychological adjustment of adults. It also explored whether remembered childhood experiences of parental acceptance mediate the relation between perceived spouse acceptance and psychological adjustment. The sample consisted of 354 married adult men (178) and women (176). Results showed that the more accepting both men and women perceived their spouses to be, the better was their psychological adjustment. Similarly, the more accepting both men and women remembered their parents had been to them during childhood, the better was their psychological adjustment. Standard multiple regression analyses revealed that paternal acceptance mediated the relation between perceived spouse acceptance and the psychological adjustment of both men and women. In addition, remembered maternal acceptance mediated the relation between men’s (but not women’s) perceived spouse acceptance and psychological adjustment.     

Race and Ethnic Differences in Hope and Hopelessness as Moderators of the Association Between Depressive Symptoms and Suicidal Behavior

Abstract

Objective: The authors examined trait hope and hopelessness as potential moderators of the association between depressive symptoms and suicidal behavior. Participants: A diverse sample of 372 college students. Methods: Depressive symptoms, hopelessness (Beck Hopelessness Scale), trait hope (Trait Hope Scale), and suicidal behaviors were assessed. Trait hope is defined as confidence in the ability to identify and attain goals, whereas hopelessness encompasses future attitudes and motivation loss. Results: In independent models, low hopelessness buffered the association between depressive symptoms and suicidal behavior for our whole sample, blacks, and whites, whereas trait hope buffered for Hispanics and whites. Examined simultaneously, hope remained a significant moderator only in whites and hopelessness only in blacks. These findings suggest that etiological and outcome correlates of hope and hopelessness may differ by ethnicity. Conclusions: These findings may have implications for development of culturally targeted interventions for college students that strive to simultaneously reduce hopelessness and bolster hopefulness.     

Depletion

Abstract

In this article we explore the concept of depletion through social reproduction (DSR). We describe depletion, identify its key indicators and suggest different methodologies that could be used to measure it. We discuss issues having to do with gendered harm as well as questions about how depletion might be reversed. We conclude that recognizing DSR in this way can be a powerful tool for understanding the consequences of non-recognition of the value of domestic work to national economies, as well as the harm that might accrue in the doing of this work at both a systemic and individual level.     

Intra-Individual Differences and Relationship-Specificity of Mentalising in Early Adolescence

There is increasing interest in understanding how relationships promote children's understanding of their own and others' thoughts and feelings. A key question in this research is whether children's ability and motivation to represent and nderstand anothers' thoughts and feelings is a function of the quality of the relationship with that individual or, alternatively, a more general characteristic of the child that is similarly expressed across relationship contexts. The current study sought to extend previous research by assessing mentalising behaviour in early adolescence and examining intra-individual differences in adolescents' mentalising behaviour about self and other in different relationships. The research design exploited the natural experiment of the secondary school, in which children develop very diverse relationships with different teachers. In the spring of the academic year, a vignette-based, semi-structured interview was administered, and students' understanding and attributions of mental states of their most and least liked teachers were coded using a newly developed system. Results indicated that there were significant intra-individual differences in adolescents' mentalising; the psychological sophistication with which adolescents understood and described another's behaviour was predicted from the affective quality of the relationship. In addition, there was significantly less incongruity or distortion in adolescents' mentalising about their most liked teacher compared with their least liked teacher, highlighting the need to consider not only the presence but also the 'accuracy' of mentalising.