Symbols Build Communication and Thought: The Role of Gestures and Words in the Development of Engagement Skills and Social‐emotional Concepts during Toddlerhood

Social skills and symbol skills are positively associated in middle childhood, but the relation between these domains is less clear in newly verbal toddlers. Vygotsky proposed that symbols are both tools for interaction and mental tools for thought. Do symbols help even very young children build skills for interacting with and conceptualizing the social world? Longitudinal data from 108 children and mothers were collected when children were 14, 24, and 36 months. Children's gestures and words during mother–child interactions were used as symbol skill indicators to predict children's abilities to engage others and the number of social‐emotional concepts children portray during play. In a series of growth models, words had a stronger effect on engagement skills whereas early gesture use predicted later development of social‐emotional concepts. Therefore, even in early development, symbols serve as both communication tools and mental tools to construct understanding of the social‐emotional world.     

Prediction based classification for longitudinal biomarkers

Assessment of circulating CD4 count change over time in HIV-infected subjects on antiretroviral therapy (ART) is a central component of disease monitoring. The increasing number of HIV-infected subjects starting therapy and the limited capacity to support CD4 count testing within resource-limited settings have fueled interest in identifying correlates of CD4 count change such as total lymphocyte count, among others. The application of modeling techniques will be essential to this endeavor due to the typically non-linear CD4 trajectory over time and the multiple input variables necessary for capturing CD4 variability. We propose a prediction based classification approach that involves first stage modeling and subsequent classification based on clinically meaningful thresholds. This approach draws on existing analytical methods described in the receiver operating characteristic curve literature while presenting an extension for handling a continuous outcome. Application of this method to an independent test sample results in greater than 98% positive predictive value for CD4 count change. The prediction algorithm is derived based on a cohort of n = 270 HIV-1 infected individuals from the Royal Free Hospital, London who were followed for up to three years from initiation of ART. A test sample comprised of n = 72 individuals from Philadelphia and followed for a similar length of time is used for validation. Results suggest that this approach may be a useful tool for prioritizing limited laboratory resources for CD4 testing after subjects start antiretroviral therapy.     

Some special forms of aggressiveness in activity group therapy and their impact on the therapist

Internal World and External Reality: Object Relations Theory Applied. Otto F. Kernberg, M.D. (New York: Jason Aronson, 1980.)

Treatment of the Obsessive Personality. Leon Salzman. (New York: Jason Aronson, 1980.)

Social Work Practice: People and Environments. Ed. Carel P. Germain. (New York: Columbia University Press, 1979.)

The Life Model of Social Work Practice. Carel Germain and Alex Gitterman. (New York: Columbia University Press, 1980.)

Social Science Research and Decision‐Making. Carol H. Weiss. (New York: Columbia University Press, 1980.)     

It Won't Change a Thing: The Meanings of Marriage in the Netherlands

The vast body of literature that highlights the increasing fragility of marriage fails to explore the effect of this fragility on the meanings people attach to marriage. During the last twenty-five to thirty years the instrumental and normative reasons for marriage—legal protection, societal support and enforcement, the social rejection of alternatives to marriage—have largely disappeared in the Netherlands. This study focuses on how young adults, raised after the most dramatic changes in marital practices took place, talk about the meanings of marriage in the context of building intimate relationships. In-depth interviews with fifteen heterosexual young adults (aged twenty-one to thirty) who were in a committed relationship showed that they talked about marriage in four different ways. They (1) minimized the meaning of marriage, (2) talked about the idea of marriage to ascertain commitment, (3) defined marriage as the ideal relationship, and/or (4) saw marriage as a jinx. Contradictions between these modes of talk revealed feelings of ambivalence and anxiety associated with a desire for commitment. The emotionally charged meanings associated with marriage anchored marriage in interviewees' imaginations, enabling the institution to retain its hold even though social pressures to marry are limited and legal substitutes to marriage exist.     

Central Limit Theorem approximations for the number of runs in Markov-dependent binary sequences

We consider Markov-dependent binary sequences and study various types of success runs (overlapping, non-overlapping, exact, etc.) by examining additive functionals based on state visits and transitions in an appropriate Markov chain. We establish a multivariate Central Limit Theorem for the number of these types of runs and obtain its covariance matrix by means of the recurrent potential matrix of the Markov chain. Explicit expressions for the covariance matrix are given in the Bernoulli and a simple Markov-dependent case by expressing the recurrent potential matrix in terms of the stationary distribution and the mean transition times in the chain. We also obtain a multivariate Central Limit Theorem for the joint number of non-overlapping runs of various sizes and give its covariance matrix in explicit form for Markov dependent trials.     

Betterment and trust in a rural Ciskei village∗

During the 1960's government‐financed agricultural betterment schemes were introduced into several rural villages in the Keiskammahoek magisterial district of the Ciskei, ‘a self‐governing homeland in South Africa'’ (Quail, 1980).

The first part of this paper traces the planning and implementation of betterment in Cata village. Seen in terms of its own goal of creating a ‘stable rural peasantry’ the betterment scheme has not succeeded. However, the success of a betterment scheme should not be seen only in terms of material and socialbenefits, but also in terms of its ability to persuade the villagers of the desirability and value of betterment as such, to change attitudes. Here the scheme has scored only very limited success. The second part of the paper looks at the villagers‘¹ perceptions of the desirability and value of betterment as it was brought to them and considers the differences between their attitudes and those of officialdom.     

Resettlement challenges faced by refugee claimant families in Montreal: lack of access to child care

Adult refugee claimants experience several well‐documented post‐migratory challenges. Little is known about the resettlement process for refugee claimant families with children. This study reports on 75 open‐ended, in‐depth interviews with refugee claimant families in Montreal about their resettlement challenges and their proposed solutions to them. These interviews were conducted with 33 dyads and triads of children and parents attending a paediatric hospital. Experiences accessing formal and informal child care in Montreal were addressed. Subsequently, a comparative policy analysis was conducted on residency eligibility criteria for child care subsidization. Twenty‐eight out of 39 parents (73%) report a lack of informal or formal child care and 15 out of 33 families (39%) propose improving access to formal child care services. They describe a lack of informal child care as a result of reduced social networks, and affordability as a barrier to formal child care services. Refugee claimants are not eligible for subsidized child care in Quebec. A comparative policy analysis within Canada and comparable countries reveals that this situation is not unique to Quebec. However, most provinces and European countries offer child care subsidies to refugee claimants. Refugee claimants should qualify for child care subsidies. Social workers and community organizations should consider their clients' child care needs in designing programmes and services.     

Further influence measures in factor analysis

Various influence measures are discussed for sensitivity analysis in factor analysis. The internal norm is used to characterize the vector-valued influence curves in factor analysis. Influence curves for the chi-square goodness of fit test, and the determinants of the model covariance matrix and unique variance matrix are derived. They are found to have simple formulas which are easy to be interpreted and have nice distributions for calibration. The likelihood displacement is also applied to sensitivity analysis in maximum likelihood factor analysis.     

Potential Selective Responding in a Parent Questionnaire Study of Post-Institutionalized Children

This study assesses selective responding in a single wave of data collection and a four-wave study. Participants were 121 parents of post-institutionalized children, identified as “never responders,” “previous responders,” or “wave 4 responders.” Parents evaluated their adopted child's family, school, peer, and behavioral adjustment. Children (47% male) were 2 to 20 years old (M = 10.79, SD = 4.59) and adopted between 5 and 54 months of age (M = 15.49, SD = 9.94). Within a single wave of data collection, no evidence suggested that selective responding contributes much bias. Over a multi-wave study, however, results may under-represent adjustment difficulties.