A Meta-Analysis of Children's Hand-to-Mouth Frequency Data for Estimating Nondietary Ingestion Exposure

Because of their mouthing behaviors, children have a higher potential for exposure to available chemicals through the nondietary ingestion route; thus, frequency of hand-to-mouth activity is an important variable for exposure assessments. Such data are limited and difficult to collect. Few published studies report such information, and the studies that have been conducted used different data collection approaches (e.g., videography versus real-time observation), data analysis and reporting methods, ages of children, locations, and even definitions of "mouthing." For this article, hand-to-mouth frequency data were gathered from 9 available studies representing 429 subjects and more than 2,000 hours of behavior observation. A meta-analysis was conducted to study differences in hand-to-mouth frequency based on study, age group, gender, and location (indoor vs. outdoor), to fit variability and uncertainty distributions that can be used in probabilistic exposure assessments, and to identify any data gaps. Results of this analysis indicate that age and location are important for hand-to-mouth frequency, but study and gender are not. As age increases, both indoor and outdoor hand-to-mouth frequencies decrease. Hand-to-mouth behavior is significantly greater indoors than outdoors. For both indoor and outdoor hand-to-mouth frequencies, interpersonal, and intra-personal variability are approximately 60% and approximately 30%, respectively. The variance difference among different studies is much bigger than its mean, indicating that different studies with different methodologies have similar central values. Weibull distributions best fit the observed data for the different variables considered and are presented in this article by study, age group, and location. Average indoor hand-to-mouth behavior ranged from 6.7 to 28.0 contacts/hour, with the lowest value corresponding to the 6 to <11 year olds and the highest value corresponding to the 3 to <6 month olds. Average outdoor hand-to-mouth frequency ranged from 2.9 to 14.5 contacts/hour, with the lowest value corresponding to the 6 to <11 year olds and the highest value corresponding to the 6 to <12 month olds. The analysis highlights the need for additional hand-to-mouth data for the <3 months, 3 to <6 months, and 3 to <6 year age groups using standardized collection and analysis because of lack of data or high uncertainty in available data. This is the first publication to report Weibull distributions as the best fitting distribution for hand-to-mouth frequency; using the best fitting exposure factor distribution will help improve estimates of exposure. The analyses also represent a first comprehensive effort to fit hand-to-mouth frequency variability and uncertainty distributions by indoor/outdoor location and by age groups, using the new standard set of age groups recommended by the U.S. Environmental Protection Agency for assessing childhood exposures. Thus, the data presented in this article can be used to update the U.S. EPA's Child-Specific Exposure Factors Handbook and to improve estimates of nondietary ingestion in probabilistic exposure modeling.     

Challenges in Governance for the PSA as a Regional Sociological Association

In this essay we identify and discuss some of the challenges currently faced by the Pacific Sociological Association (PSA) related to its governance. The PSA is not unlike other regional associations and faces similar challenges. The rapid growth in membership for the association has repeatedly placed strains on the governance structure, particularly on the office of the Executive Director. The formal organization of governance has not always matched the actual ways in which governing is carried out, almost entirely by volunteers. Although there is growth, there is also significant turnover in members from year to year and this presents a challenge for maintaining an active, vibrant organization. The governing structure of elected committees and officers has not changed with membership growth but the number of standing committees has increased dramatically, spreading the volunteer membership thin. To meet these challenges, we make several suggestions. We argue for the importance of maintaining a stable membership; that the PSA should continue its work to formally define roles and positions including a restructuring of its committees; and an emphasis should be placed on providing an intellectual home for the members of the PSA. We elaborate on these responses to the challenges faced by the PSA and suggest considerations for the association as it moves into the final decade of its first 100 years.     

Reimagining social work case studies: a social work—creative writing collaboration

This paper describes a joint social work and creative writing project which analysed case studies from textbooks on reading lists for the Bachelor of Social Work course at Edith Cowan University. The textbook case studies were analysed from the perspectives of both social work and literary craft and it was found that they presented simplified scenarios which were limited in terms of diversity and rarely portrayed depth or complexity. The case studies were also often bereft of information about social workers’ or service users’ human qualities and frequently portrayed service users in terms of the problems they presented to the social worker. The authors argue that depicting social workers and service users in this way can create the impression that social work is a distanced procedural activity and can also serve to distance service users’ lives and experiences from social work students. Drawing on research in creative writing craft, as well as analysis of the textbook case studies, principles for writing engaging text-book case studies were developed and the paper concludes by arguing for the use of these principles when crafting social work case studies.     

“Raised Eyebrows”: Working with Lesbian‐Parented Families — Experiences of Childcare Centre Directors in Australia

When reflecting on their experiences with children from lesbian‐parented families, 64 childcare centre directors in Victoria, Australia indicated that explicit programs, policies or resources of support were absent in their centres. Importantly, participants' pre‐ and post‐professional education either ignored or superficially addressed lesbian matters. This may explain the limited nature of inclusion of lesbian matters in early childhood education. Of note, is the pervasive nature of ‘truths’ upheld by educators. That is, in the Foucauldian sense these educators perceived lesbian families as being the ‘same’ as heterosexual families. Despite the considerable shifts in professional attitudes and ‘truths’ about sexuality, the Foucauldian silences were being reinforced in everyday practice as evidenced by the reference to ‘raised eyebrows’ by participants when this silence about sexuality was threatened.     

Substance use and its relationship to family functioning and self-image in adolescents

This study examined associations between substance use, family functioning, and self-image among four ethnic adolescent groups. Three thousand three hundred and fifteen 8th and 9th grade students were recruited from 10 schools in Los Angeles County. Participants completed a paper-and-pencil survey regarding their alcohol and marijuana use, along with their perceived family functioning and self-image and other demographic variables. Ordinal logistic regression was performed to examine associations. Results indicated that both family functioning and self-image were significantly associated with alcohol and marijuana use. Those who scored lower on family functioning and self-image were at increased risk for substance use. Furthermore, students who scored low in both family functioning and self-image were about twice as likely to report using alcohol.     

Teaching about near-death experiences: the effectiveness of using The Day I Died

In this article, we reviewed results of research on near-death experiences (NDEs) over the past 3 decades and examined the effect of viewing the hour-long 2002 BBC documentary The Day I Died: The Mind, the Brain, and Near-Death Experiences on accurate knowledge about near-death experiences among advanced undergraduates at a southwestern university. In a quasi-experimental research design, the experimental group completed a 20-item questionnaire before and after viewing the documentary (n = 66; 45 females, 21 males), and the waitlist control group completed the questionnaire as pre- and posttest before viewing the documentary (n = 39; 36 female, 3 male). The two groups' scores at pretest were not significantly different (p > .05). Group by occasion repeated measures ANOVA revealed the experimental group's posttest scores moved significantly in the direction of correctness with a large effect size (p < .001; eta2 = .56), whereas waitlist control group posttest scores remained similar to pretest scores. We discuss two exceptions to the effectiveness of the documentary and recommendations for educators using it as well as for future research.     

CHILD CARE USE BY LOW‐INCOME FAMILIES IN RURAL AREAS

Using data from interviews with 323 low‐income women living in rural counties in 11 states, child care arrangements for 672 children under 13 are described in relation to women's employment status, partner availability, and child age. As found in previous studies of rural areas, informal care is frequently used, regardless of full‐ or part‐time work or partner availability. Single mothers rely more on regulated care arrangements than mothers with partners and are more likely to pay for informal care than other mothers. Work in part‐time and service jobs suggests the need for flexible arrangements. Public data on child care availability and access in rural areas, the cost of care, and state subsidy programs suggest reasons for rural women's child care decisions. Policy implications of the study findings are shared.     

Room at the academy? People with learning difficulties and higher education

This article considers the contributions of people with learning difficulties to an undergraduate degree programme in Learning Disability Studies at the University of Manchester. It begins with an evaluation of models of disability and their implications for the study and production of knowledge about learning disability. It then goes on to explore the role of people with learning difficulties—and the place of their experiences and knowledges—both on the Learning Disability Studies programme and within the academy. Drawing on the experience of the Learning Disability Studies programme, it argues for the inclusion of people with learning difficulties in learning, teaching and research.