Linguistic Labels and Categorization in Infancy: Do Labels Facilitate or Hinder?

Although it is generally accepted that labels facilitate categorization in infancy, recent evidence suggests that infants and young children are more likely to process visual input when presented in isolation than when paired with nonlinguistic sounds or linguistic labels. These findings suggest that auditory input (when compared to a no‐auditory baseline) may hinder rather than facilitate categorization. This study assessed 8‐month‐olds' (n = 191) and 12‐month‐olds' (n = 81) abilities to form categories when images were paired with nonlinguistic sounds, linguistic labels, and when presented in isolation. Overall, infants accumulated more looking when visual stimuli were accompanied by sounds or labels; however, infants were more likely to categorize when the visual images were presented without an auditory stimulus.     

An Advocacy Coalition Framework Approach to Stakeholder Analysis: Understanding the Political Context of California Marine Protected Area Policy

There is a growing recognition that public policy controversiesare driven more by value differences than by technical deficiencies.Unfortunately, we have yet to develop, test, and refine systematicapproaches for understanding political systems. In this articleI explain how the advocacy coalition framework (ACF) can beused as a theoretical basis for understanding political contextvia a stakeholder analysis. An ACF stakeholder analysis widensthe attention of policy analysts toward subsystem-wide dynamicswith multiple actors who are motivated by their beliefs, structuretheir relationships into advocacy coalitions, and try to influencepolicy through utilizing multiple resources and venues. I illustratean ACF approach to stakeholder analysis in a scientificallycontentious political conflict over the establishment of marineprotected areas in California. I conclude with a summary ofcontributions to the ACF literature and the strengths and limitationsof conducting an ACF stakeholder analysis.     

Individual laboratory-measured discount rates predict field behavior

We estimate discount rates of 555 subjects using a laboratory task and find that these individual discount rates predict inter-individual variation in field behaviors (e.g., exercise, BMI, smoking). The correlation between the discount rate and each field behavior is small: none exceeds 0.28 and many are near 0. However, the discount rate has at least as much predictive power as any variable in our dataset (e.g., sex, age, education). The correlation between the discount rate and field behavior rises when field behaviors are aggregated: these correlations range from 0.09–0.38. We present a model that explains why specific intertemporal choice behaviors are only weakly correlated with discount rates, even though discount rates robustly predict aggregates of intertemporal decisions.     

Estimation of parameterized spatio-temporal dynamic models

Spatio-temporal processes are often high-dimensional, exhibiting complicated variability across space and time. Traditional state-space model approaches to such processes in the presence of uncertain data have been shown to be useful. However, estimation of state-space models in this context is often problematic since parameter vectors and matrices are of high dimension and can have complicated dependence structures. We propose a spatio-temporal dynamic model formulation with parameter matrices restricted based on prior scientific knowledge and/or common spatial models. Estimation is carried out via the expectation–maximization (EM) algorithm or general EM algorithm. Several parameterization strategies are proposed and analytical or computational closed form EM update equations are derived for each. We apply the methodology to a model based on an advection–diffusion partial differential equation in a simulation study and also to a dimension-reduced model for a Palmer Drought Severity Index (PDSI) data set.     

Measuring the Dynamic Efficiency Costs of Regulators' Preferences: Municipal Water Utilities in the Arid West

Evidence suggests that municipal water utility administrators in the western US price water significantly below its marginal cost and, in so doing, inefficiently exploit aquifer stocks and induce social surplus losses. This paper empirically identifies the objective function of those managers, measures the deadweight losses resulting from their price‐discounting decisions, and recovers the efficient water pricing policy function from counterfactual experiments. In doing so, the estimation uses a “continuous‐but‐constrained‐ control” version of a nested fixed‐point algorithm in order to measure the important intertemporal consequences of groundwater pricing decisions.     

A Person Without a Past: Robert Michels and Alfred Schutz and the Sociology of the “Stranger”

Robert Michels and Alfred Schutz might not seem to have much in common. Michels was a political sociologist and Schütz was a philosopher of phenomenology, but they shared one crucial thing: they were both strangers in foreign countries. Michels left Germany for Italy and Switzerland because he was not permitted to complete the second degree necessary to teach at the university level while Schutz was compelled to leave Austria for France and the United States because of his Jewish background. Their experiences of trying to adapt in a foreign country prompted them to reflect on what it means to be “the stranger” (“Der Fremde”). Michels wrote “Materialien zu einer Soziologie des Fremden” in 1925 and Schutz published “The Stranger: An Essay in Social Psychology” in 1944. While Schutz’ article has been repeatedly cited, there does not seem to be a study devoted to it. Michels' article remains among his most neglected writings. However, both works offer a theoretical and contextual account of the obstacles the stranger encounters when trying to understand and to acclimate oneself to a new environment. As Schutz noted, the stranger is a person “without a past”, and Michels suggested, is also a person with an uncertain future.     

Dynamic Choices of Hyperbolic Consumers

Laboratory and field studies of time preference find that discount rates are much greater in the short‐run than in the long‐run. Hyperbolic discount functions capture this property. This paper solves the decision problem of a hyperbolic consumer who faces stochastic income and a borrowing constraint. The paper uses the bounded variation calculus to derive the Hyperbolic Euler Relation, a natural generalization of the standard Exponential Euler Relation. The Hyperbolic Euler Relation implies that consumers act as if they have endogenous rates of time preference that rise and fall with the future marginal propensity to consume (e.g., discount rates that endogenously range from 5% to 41% for the example discussed in the paper).     

Paradoxes, locations and the need for social coherence: a qualitative study of living with a learning difficulty

Policy rhetoric over recent decades has promoted social inclusion of the more vulnerable sectors of society, such as people with learning difficulties. This study aimed to describe the experiences of people who live with learning difficulties in order to inform local service development. Thirty-five people with a learning difficulty and/or a family member were interviewed. A model of social coherence was developed that moves beyond the self-limiting debates about social inclusion and exclusion. It is underpinned by a sense of location for the person with a disability in relation to services and carers, family and community, dependency and risk, temporality and space, events, control and society. Key recommendations are for services to know the individual and his/her family; to be responsive to individual needs; to enhance the capacity of families and communities to support people with difficulty in learning; and to help these people to feel more valued.     

Practice experience and social work education

Abstract

This paper examines the arguments that are often put in favour of social work academics having direct practice experience in order to enhance their teaching effectiveness. The paper looks at the number of ways that social work academics can gain up to date knowledge of practice developments and explores what constitutes an effective teacher. It concludes that recent direct practice experience will be of limited use in assisting social work academics to become effective teachers and that there are other ways that academics can become aware of practice developments that are in line with the other professional requirements on academics such as research and knowledge generation.