Fitting Curves to Human Respiratory Data

Records of gas flow during breathing are cyclical, with the cycles varying in duration. The shape of these cycles may change with the intensity of respiratory stimulation or the development of respiratory disease, but currently research is hampered by the lack of a fully satisfactory technique for determining the shape of a typical cycle. The approach adopted here is to replace the time series by a 'phase diagram', plotting the time integral of flow against flow itself. Principal curves are then fitted. These are curves `through the middle of the data' which were introduced by Hastie and Stuetzle. The shapes of these curves are compared, either directly or after reconstructing an average cycle corresponding to each fitted curve. This has the advantage that the shape of the waveform is separated from the amplitude, and from the duration of the breath. A disadvantage is that periods of zero flow are lost, and the reconstructed average cycle may show irregularities at points near zero flow as a result. In practice, the methodology showed clear differences in shape between the protocols, gave reasonable average cycles and ordered the waveform shapes according to the hardness of breathing induced by the protocols.     

Adolescent and parent alliances with therapists in Brief Strategic Family Therapy with drug-using Hispanic adolescents

This study examined the relationship between alliance and retention in family therapy. Alliance was examined at the individual (parent, adolescent) and family level (within-family differences) for families that either dropped out or completed family therapy. Participants were 31 Hispanic adolescents and their family members who received brief strategic family therapy for the treatment of adolescent drug use. Videotapes of first sessions were rated to identify parent and adolescent alliances with the therapist. Results demonstrated that Completer cases had significantly higher levels of alliance across all family members than Dropout cases, and Dropout cases had significantly higher unbalanced alliances than Completer cases. Clinical implications are discussed.     

Depressed and Well Mothers' Emotion Interpretation Accuracy and the Quality of Mother—Infant Interaction

The inadequate parenting associated with mothers' depression may be related to mothers' problems in interpreting infants' emotional expressions. The relations between depressed and well mothers' accuracy at interpreting babies' facial expressions and the quality of the mothers' interactions with their infants were examined. In partial support of our hypotheses, depressed mothers' level of depressive symptoms was associated with less accuracy, especially regarding positive emotions. Contrary to expectations, depressed mothers did not differ from well mothers in terms of their emotion accuracy. Furthermore, depressed mothers' accuracy at interpreting infants' emotions was not significantly related to the quality of their interaction with their infants; in contrast, well mothers' accuracy for infants' negative emotions was associated with better interaction quality. These findings provide new information about depressed mothers' emotional interpretations and their parenting. The different pattern of findings for depressed and well mothers suggests that other mediating factors are important, which are discussed.     

Changing Homeowners' Behaviors Involving Toxic Household Chemicals: A Psychological, Multilevel Approach

We describe an education and behavior change program with a multi-level approach. The program goal is to change how people think about, use, store, and dispose of toxic household chemicals. We assume that changing long-standing behaviors is difficult, requires interventions at multiple points in the individual/group/society/physical environmental system, and requires interventions that address both short- and long-term behavior change. The heart of our program is small group discussions, with a trained leader who uses psychological theories to increase educational impact. Questionnaires indicated that participants were very pleased with the program, especially recipes for homemade nontoxic alternatives. We estimate that the presentation yielded almost three times as much cooperation as the previous 5 years of publicity and promotion (33% vs. 12%).     

Homophobic Name‐calling,Peer‐groups,and Masculinity: The Socialization of Homophobic Behavior in Adolescents

Social network analysis and multilevel modeling were used to examine the formation of homophobic name‐calling behavior in adolescents. Specifically, peer group contextual and socialization effects on homophobic name‐calling as well as the influence of masculinity attitudes, general bullying perpetration, and victimization were tested. Participants included 493 fifth‐ through eighth‐grade students from two middle schools. Results indicated that peer groups play an important role in the formation of homophobic name‐calling. Additionally, students who were victims of homophobic name‐calling over time increased their own perpetration of homophobic name‐calling. Non‐homophobic bullying was also related to homophobic name‐calling, but only for male peer groups. And finally, the role of masculinity attitudes was shown to be complex, as peer group masculinity attitudes were significantly predictive of an individual's homophobic perpetration; however, this effect did not remain significant over time. Results suggest that homophobic name‐calling during early adolescence is strongly influenced by peers and rooted in gender and masculinity.     

Teaching Note—BSW Students’ Experiences With an MBSR Assignment and the Five Facets of Mindfulness

BSW students appear to be under increasing levels of stress. In response to concerns about students’ well-being, we developed a three-credit-hour self-care elective. This article explores students’ participation in the primary assignment of the course, a modified version of mindfulness-based stress reduction. We also present empirical findings of an exploratory study examining students’ mindfulness and their subjective experiences with the assignment. Results support the usefulness of mindfulness-based stress reduction assignments in supporting BSW students’ well-being. This kind of assignment may also contribute to the development of the first social work competency, “demonstrate ethical and professional behavior,” (Council on Social Work Education, 2015, p. 7) through an increase in self-reflective and self-regulation skills.