A new mixture model for capture heterogeneity

Summary.  We propose a mixture of binomial and beta–binomial distributions for estimating the size of closed populations. The new mixture model is applied to several real capture–recapture data sets and is shown to provide a convenient, objective framework for model selection. The new model is compared with three alternative models in a simulation study, and the results shed light on the general performance of models in this area. The new model provides a robust flexible analysis, which automatically deals with small capture probabilities.     

E-optimal designs for three treatments

E-optimality is studied for three treatments in an arbitrary n-way heterogeneity setting. In some cases maximal trace designs cannot be E-optimal. When there is more than one E-optimal design for a given setting, the best with respect to all reasonable criteria is determined.     

Longitudinal links of parental solicitation,knowledge, and peer approval with deviance during early adolescence

The current study examined growth-to-growth associations of parental solicitation, knowledge, and peer approval with deviance during early adolescence, using a 4-wave, 18-month self-reported longitudinal data set from 570 Czech early adolescents (58.4% female; M_age = 12.43 years, SD = 0.66 at baseline). Unconditional growth model tests provided evidence of significant changes in the three parenting behaviors and in deviance over time. Multivariate growth model tests showed that declines in maternal knowledge were associated with increases in deviance, while greater increases in parental peer approval were associated with slower increases in deviance. Findings provide evidence of dynamic changes in parental solicitation, knowledge, and peer approval over time, as well as in deviance; additionally, they importantly show how parental knowledge and peer approval covary developmentally with deviance.     

Supporting the agency of cities as climate migration destinations

As climate migration has garnered the interest of research and policy communities over the last two decades, the focus has been on whether, how and where climate stresses might precipitate out-migration, and how to assist and protect those affected. Less attention has gone to the places that receive climate migrants, and how their arrival might affect adaptation at destination. Against the backdrop of increasingly severe climate disruptions, this paper examines the likelihood of climate-related movements going into urban areas, and the challenges that this may entail for those who move and for urban governance. With much of climate migration projected to feed into existing urbanization trends, we see the need for data and research to help bolster the agency of communities and cities to plan and act locally, and across geographies, for inclusion and resilience, and to advocate collectively for enabling policy frameworks and increased national and international support.     

A Social Psychology of National and International Group Relations

This concluding article provides a framework for a social psychological analysis of intergroup conflict and conflict resolution. The framework highlights the individual and intergroup factors that shape the nature of perceptions of intergroup relations and group representations, and describes how these perceptions lead to cognitive, affective, and behavioral responses toward groups. Included in the framework are the metatheoretical, theoretical, and practical contributions of the articles in this issue toward understanding intergroup relations. The potential and responsibility of social psychologists to move beyond the laboratory to applied national and international issues is also discussed.     

Pragmatics of Self- and Other-Reference in Young Children

During the first years of life, children come to understand and talk about a self separate from others. This study examined self- and other-reference and communicative intents expressed by children and parents in dyadic interaction at 14, 20 and 32 months. Research questions included whether children's early use of self- and other-reference pronouns occurred for expression of particular communicative intents, how use changed with age, and whether parent and child pragmatic expressions of self and other were similar. Results showed that children's early explicit reference to self tended to take the form of I rather than me/my/mine, and was used primarily in making statements about their intended actions, in making requests or proposals to their parents and in stating propositions about the world around them. Children during this developmental period were only beginning to refer to the present other with the pronoun you and these instances occurred primarily in making requests or proposals. Despite age-related increases in pronominal forms and intents, a small set of intents continued to provide the context for most self- and other-reference pronouns. In the communicative contexts in which they explicitly refer to self and other, children did not appear to exclusively mirror those which were observed in parental speech.