Fixed-parameter tractability of anonymizing data by suppressing entries

A popular model for protecting privacy when person-specific data is released is k -anonymity. A dataset is k-anonymous if each record is identical to at least (k−1) other records in the dataset. The basic k-anonymization problem, which minimizes the number of dataset entries that must be suppressed to achieve k-anonymity, is NP-hard and hence not solvable both quickly and optimally in general. We apply parameterized complexity analysis to explore algorithmic options for restricted versions of this problem that occur in practice. We present the first fixed-parameter algorithms for this problem and identify key techniques that can be applied to this and other k-anonymization problems.     

Economic distress and mental health: The role of family coping resources and behaviors

Relationships among economic distress, family coping resources and behaviors, and mental health are examined among a sample of 203 married men and 207 married women. Economic distress is negatively associated with mental health. Although family coping resources are lower among those experiencing economic distress and are generally positively related to mental health, their role as mediators of relationships between economic distress and mental health is limited. Economic distress is positively related to family coping behaviors. However, these behaviors do not have positive relationships with mental health and do not counteract the effects of economic distress on mental health. Some coping resources and behaviors have buffering effects on relationships between economic distress and mental health while others have exacerbating effects.This article is a revision of a paper presented at the annual meeting of the American Sociological Association, August, 1986. The research was supported by grant 84–164 from the Office of Program Evaluation and Research, Ohio Department of Mental Health. Additional support was provided by the Office of Computing Activities, University of Dayton.Patricia Voydanoff is Director of the Center for the Study of Family Development, University of Dayton. Dr. Voydanoff holds a Ph.D. in Sociology from Wayne State University. Her research interests include work and family life and coping with economic distress.Brenda W. Donnelly is a Research Associate at the Center for the Study of Family Development, University of Dayton. Dr. Donnelly received her Ph.D. from the University of Delaware. She is currently conducting research on adolescent childbearing and religion and family life.     

The evaluation of a mind/body intervention to reduce psychological distress and perceived stress in college students

The authors examined the effect of a 6-week mind/body intervention on college students' psychological distress, anxiety, and perception of stress. One hundred twenty-eight students were randomly assigned to an experimental group (n = 63) or a waitlist control group (n = 65). The experimental group received 6 90-minute group-training sessions in the relaxation response and cognitive behavioral skills. The Symptom Checklist-90-Revised, Spielberger State-Trait Anxiety Inventory, and the Perceived Stress Scale were used to assess the students' psychological state before and after the intervention. Ninety students (70% of the initial sample) completed the postassessment measure. Significantly greater reductions in psychological distress, state anxiety, and perceived stress were found in the experimental group. This brief mind/body training may be useful as a preventive intervention for college students, according to the authors, who called for further research to determine whether the observed treatment effect can be sustained over a longer period of time.