A study of R2 measure under the accelerated failure time models

For right-censored data, the accelerated failure time (AFT) model is an alternative to the commonly used proportional hazards regression model. It is a linear model for the (log-transformed) outcome of interest, and is particularly useful for censored outcomes that are not time-to-event, such as laboratory measurements. We provide a general and easily computable definition of the R² measure of explained variation under the AFT model for right-censored data. We study its behavior under different censoring scenarios and under different error distributions; in particular, we also study its robustness when the parametric error distribution is misspecified. Based on Monte Carlo investigation results, we recommend the log-normal distribution as a robust error distribution to be used in practice for the parametric AFT model, when the R² measure is of interest. We apply our methodology to an alcohol consumption during pregnancy data set from Ukraine.     

Disaster preparedness networks in rural Midwest communities: Organizational roles,collaborations, and support for older residents

ABSTRACT

This study investigated the roles and interconnections among community organizations belonging to local disaster coalitions in Midwest in supporting older residents. Representatives from 44 organizations participated in one-time survey. Most were non-profit (68%) or federal/state/local government agencies (23%). The analyses of 761 relationships showed stronger collaborations in assessment (average strength=2.88 on a 5-point scale), emergency response (2.72), and planning (2.61); and weaker collaborations in co-sponsoring programs (1.71) and supporting older residents (2.03). The extent of collaboration (network density) to support older adults was also low. Coalitions may enhance network density and centralization by developing sub-committee structure and strengthening existing collaborations.     

Gender,Culture and Intervention: Exploring Differences between Aboriginal and Non‐Aboriginal Children’s Responses to an Early Intervention Programme

Evaluation of a group parenting programme in the Northern Territory of Australia showed significant differences in benefits for Aboriginal and non‐Aboriginal boys and girls. The analysis considers whether boys and girls from different cultural backgrounds present with different problems; whether parental expectations for boys and girls differ and whether the intervention activates different responses in different settings. Conclusions suggest that there is a need to closely examine the ‘cultural logic’ of interventions, the appropriateness of their assumptions about child development and hypothesised mechanisms of change in different settings.     

Faculty in the Middle

This study was designed to explore how organizational life in university-affiliated graduate social work education programs in the United States is affected by the stress of heightened caregiving roles. Analysis of data from 69 schools demonstrated deleterious effects of caregiving stress on organizational effectiveness, including missed obligations, feeling overwhelmed, and distracting others by seeking social support for specific problems. The authors identify two variables that provided partial amelioration of caregiver stress and appeared to contribute to increased organizational effectiveness: larger faculty size and on-site child care.     

Childhood Sexual Abuse Severity Reconsidered: A Factor Structure of CSA Characteristics

To address the lack of empirically grounded measures of childhood sexual abuse severity, a survey of self-report items was developed following a thorough review of the childhood sexual abuse literature. An exploratory factor analysis was conducted using data collected from a convenience sample of college students that included 275 females and males with a history of childhood sexual abuse. The solution produced seven factors interpreted as the following: (a) less intrusive forms of childhood sexual abuse (e.g., sexual invitations, kissing), (b) more intrusive forms of childhood sexual abuse (e.g., oral sex, intercourse), (c) humiliation/fear, (d) childhood sexual abuse involving photography, (e) familiarity with the perpetrator, (f) physical force/rape, and (g) active digital penetration. Correlations among these factors further suggested the existence of two relatively independent second-order factors, one based on the levels of physical intrusiveness and the other composed of the psychological/emotional factors. While arguably the most common measurement of severity, physical intrusiveness had little association with critical factors such as humiliation, fear, and association with the perpetrator. Consequently, physical intrusiveness appears to be an inadequate stand-alone measure of childhood sexual abuse severity. These results are proposed to lay the groundwork for an improved, more comprehensive measure of childhood sexual abuse severity.     

Persistent Complications of Child Sexual Abuse: Sexually Compulsive Behaviors,Attachment, and Emotions

ABSTRACT

Child sexual abuse has the potential to cause distress for the victim across the lifespan. Romantic relationships may be particularly difficult for victims of child sexual abuse. This retrospective study examined differences in adult romantic attachment, sexually compulsive behaviors, and emotion regulation by history of child sexual abuse in a large, nonclinical sample. Those with a history of child sexual abuse reported more attachment anxiety in romantic relationships and engaged in more sexually compulsive behaviors. Overall, males displayed more sexually compulsive behaviors than females regardless of history of sexual abuse. Males with a history of sexual abuse displayed the greatest number of sexually compulsive behaviors. Surprisingly, no differences were observed in emotion regulation or attachment avoidant behaviors by history of child sexual abuse. Future research should seek to replicate current findings and examine emotion regulation difficulties experienced as a result of trauma.     

Behavioral and Relational Contexts of Adolescent Desire,Wanting, and Pleasure: Undergraduate Women's Retrospective Accounts

Studies of adolescent female sexuality often focus on coitus to the exclusion of noncoital behaviors, the relational context of sexual interactions, and adolescent women's subjective perceptions of their experiences. In this study, 38 undergraduate women's retrospective accounts of their adolescent heterosexual experiences were examined. Generalized estimating equation models were used to test the relation of diverse heterosexual behaviors and relationship types to participants' subjective perceptions of desire, wanting, and pleasure. Of the sexual behaviors, coitus was the strongest predictor of participants' subjective perceptions. Compared to coitus, erotic touching, manual stimulation, and fellatio were significantly less predictive; there were no differences between coitus and cunnilingus or coitus and kissing. Of the relationships (serious, dating, “friends with benefits” [FWBs], and “hookups”), FWBs was the strongest predictor of participants' desire, wanting, and pleasure; in comparison, hookups were significantly less predictive. These findings offer insight into the sexual behaviors and preferences of young women, as well as distinctions between types of non-romantic sexual relationships.     

Enough is enough: Grandmother caregivers' strategies for mitigating out-of-school suspensions for African–American youth

This qualitative study explores the strategies used by grandmothers caring for African–American grandchildren with out-of-school suspensions drawing from a larger study of caregivers. In-depth, semi-structured, individual interviews with 10 grandmothers who were caring for a total of 13 grandchildren with a range of 1 to 14 out-of-school suspensions (OSS) revealed that these grandmother caregivers took action with both their grandchildren and the grandchildren' s educators. Grandmothers became intensely involved with school and in-home educational activities. They structured their relationship with their grandchildren to attend to affection, provide incentives and respond with appropriate consequences. Additionally, grandmothers identified services and programs received and needed to enhance the grandchildren' s engagement with the learning process. Furthermore, based on strong opinions about changes needed in the schools, they provided concrete recommendations to educators. These recommendations call for professionals to support grandmothers' actions to reduce OSS and advocate to educators to revise policies and procedures that would promote a better understanding of grandchildren in the care of their grandmothers and the efforts that these grandmothers make to mitigate OSS.     

CALL FOR PAPERS

In this article historical patterns and recent trends in black migration in the United States are examined. The purpose of the article is two‐fold: (1) to examine historical changes in the volume and rates of migration between the southern region and nonsouthern regions; and (2) to determine the relative impact of migration types on the South's changeover to net in‐migration during the 1975–1980 migration interval.

The findings of this study indicate that the reversal of the historical pattern of net out‐migration of blacks from the southern region occurred two decades after the turnaround for the general population. The southern region changed from sizable net out‐migration for blacks during the period before 1970 to net in‐migration during the 1975–1980 migration interval. The changeover was due to a substantial decrease in the number of both southern‐born and non‐southern‐born blacks leaving the South. There were also increases in the rate of in‐migration into the region among both return migrants and nonsouthern migrants. The single most important factor influencing the turnaround was a decrease in the number of southern‐born blacks migrating out of the region. This finding is contrary to much current speculation about the role of return migrants in influencing the South's changeover to net in‐migration for the black population.