Missing data techniques for multilevel data: implications of model misspecification

When modeling multilevel data, it is important to accurately represent the interdependence of observations within clusters. Ignoring data clustering may result in parameter misestimation. However, it is not well established to what degree parameter estimates are affected by model misspecification when applying missing data techniques (MDTs) to incomplete multilevel data. We compare the performance of three MDTs with incomplete hierarchical data. We consider the impact of imputation model misspecification on the quality of parameter estimates by employing multiple imputation under assumptions of a normal model (MI/NM) with two-level cross-sectional data when values are missing at random on the dependent variable at rates of 10%, 30%, and 50%. Five criteria are used to compare estimates from MI/NM to estimates from MI assuming a linear mixed model (MI/LMM) and maximum likelihood estimation to the same incomplete data sets. With 10% missing data (MD), techniques performed similarly for fixed-effects estimates, but variance components were biased with MI/NM. Effects of model misspecification worsened at higher rates of MD, with the hierarchical structure of the data markedly underrepresented by biased variance component estimates. MI/LMM and maximum likelihood provided generally accurate and unbiased parameter estimates but performance was negatively affected by increased rates of MD.     

Sensitivity as a Privileged Predictor of Attachment: A Second Perspective on De Wolff and van IJzendoorn's Meta-analysis

De Wolff and van IJzendoorn's meta‐analysis supported the relation of parental behavior to attachment security; however, they concluded that sensitivity was not the best predictor of attachment security. This secondary analysis of their data re‐examined their conclusion and tested moderators of the relation between sensitivity and attachment, such as socioeconomic status and study methodology. A different grouping of studies combining behavior types of sensitivity, mutuality, and synchrony showed significantly higher correlations with attachment than did other types of maternal behavior. An analysis of a similar dataset of individual correlations defined sensitivity as synchronous, responsive, and appropriate behavior, producing similar results. Tests of moderators validated differences between studies using measures of sensitivity as compared to other measures of maternal behavior. Sensitivity was a weaker predictor of attachment in studies of low‐income families.     

Government Publications

Abstract

To determine whether health sciences faculty are sufficiently knowledgeable about copyright, fair use, and related precepts in their use of materials for teaching and research purposes, librarians at two comparable institutions, the University of Alabama at Birmingham (UAB) and the University of Texas Health Science Center at San Antonio (UTHSCSA), conducted a Web survey regarding copyright knowledge among their respective faculty. Responses were similar from both institutions despite the fact that UTHSCSA faculty had access to a more coordinated copyright education effort. Most respondents self-reported at least a limited familiarity with copyright law and fair use.     

Framing ‘drug prevention’ for young people in contact with the criminal justice system in England: views from practitioners in the field

ABSTRACT

Drawing on the work of Rein and Schon (1993. “Reframing Policy Discourse.” In The Argumentative Turn in Policy Analysis and Planning, edited by F. Fischer, and J. Forester, 145–166. London: UCL Press., 1996. “Frame-Critical Policy Analysis and Frame-Reflective Policy Practice.” Knowledge and Policy: the International Journal of Knowledge Transfer and Utilization 9 (1): 85–104), we explore the ways in which ‘young people’, ‘vulnerability’, ‘risk’, ‘prevention’ and ‘prevention practice’ were defined and framed by practitioners engaged in the design, delivery and commissioning of drug prevention interventions for young people in contact with the criminal justice system. We argue that practitioners describe their work in terms of both a preventative frame – based on a ‘deficit’ model – and a transformative praxis frame, more in line with an increasing shift towards ‘positive youth justice’ where practitioners aspire to actively involve the young person in a process of change. The implications of those, often competing, frames are discussed in relation to the development of prevention approaches and the challenges in designing drugs prevention for this group of young people. The paper is based on interviews and focus groups with thirty-one practitioners in England and is part of the EU funded EPPIC project (Exchanging Prevention Practices on Polydrug Use among Youth in Criminal Justice Systems 2017–2020).     

Social Self‐Control,Externalizing Behavior,and Peer Liking Among Children with ADHD‐CT: A Mediation Model

This study investigated the role of externalizing behavior as a mediator of the relation between social self‐control and peer liking among children with attention‐deficit/hyperactivity disorder‐combined type (ADHD‐CT). A model was proposed whereby externalizing behavior would fully statistically account for the direct relation of social self‐control to peer liking. One hundred seventy‐two children ages 7.0–9.9 years with ADHD‐CT were rated by their teachers regarding their social self‐control and by their parents and teachers regarding their rates of externalizing behavior. Same‐sex classmates provided ratings of overall liking. Structural equation modeling was used to assess the proposed model. Results supported the proposed model of externalizing behavior as fully statistically accounting for the relation of social self‐control to peer liking. This study demonstrated the crucial role that externalizing behaviors play in the social impairment commonly seen among children with ADHD‐CT.     

Building Boxes and Policing Boundaries: (De)Constructing Intersexuality, Transgender and Bisexuality

The process of social differentiation, or the process of creating boxes in which we can place other people and in which we can place ourselves, is key to the existence and persistence of social inequality. The focus of this article is on the construction and maintenance of boxes and boundaries with respect to sex, gender and sexuality. We take the existence of these boxes and boundaries for granted, organizing our lives around them in a variety of ways. Exceptions to them call our categorizations and the decisions we make based upon them into question. Particularly interesting in this context are intersexuality, transgender and bisexuality. Intersexuality, transgender and bisexuality have in common the fact that they challenge our easy reliance on categories and the boundaries between those categories. Our responses to, treatment of and understanding of these exceptions provides striking insights into our system of boxes and boundaries and, correspondingly, to sex-, gender- and sexuality-based inequalities.     

Perceptions of Family-Friendly Policies: University Versus Corporate Employees

This study adds to a growing literature examining the impact of family-friendly policies in a variety of industries by examining the differences between corporate and university employees in their subjective perceptions of work-family policies. Differences by gender and dependent care responsibility in these perceptions in the university sample are examined and compared to results that have been found in corporate settings. Data collected in a university setting was compared to similar data of thirty-seven Business Week 1000 companies. The results show that the university sample employees were significantly more negative toward their workplace's work-family climate than were the corporate sample employees. In addition, significant gender and dependent care responsibility differences exist within the university sample.