Shape-from-shading depends on visual, gravitational, and body-orientation cues

The perception of shading-defined form results from an interaction between shading cues and the frames of reference within which those cues are interpreted. In the absence of a clear source of illumination, the definition of 'up' becomes critical to deducing the perceived shape from a particular pattern of shading. In our experiments, twelve subjects adjusted the orientation of a planar disc painted with a linear luminance gradient from one side to the other, until the disc appeared maximally convex-that is, until the luminance gradient induced the maximum perception of a three-dimensional shape. The vision, gravity, and body-orientation cues were altered relative to each other. Visual cues were manipulated by the York Tilted Room facility, and body cues were altered by simply lying on one side. The orientation of the disc that appeared maximally convex varied in a systematic fashion with these manipulations. We present a model in which the direction of perceptual 'up' is determined from the sum of three weighted vectors corresponding to the vision, gravity, and body-orientation cues. The model predicts the perceived direction of 'up', contributes to our understanding of how shape-from-shading is deduced, and also predicts the confidence with which the 'up' direction is perceived.     

Screening for Significant Behavior Problems in Diverse Young Children Living in Poverty

The development and use of first line screening instruments is an essential first step in assessing behavior disorders in very young children. The Early Childhood Behavior Screen (ECBS) is a parent-report measure for behavior disorders and is normed on young children (1–5 years old) living in poverty. The current study presents psychometric support for the discriminative validity of the ECBS’s 10-item Challenging Behavior Scale (CBS) as a first-line screener for externalizing behavior problems for preschool aged-children in poverty. The study’s sample included 673 participants (M age years = 2.81; 63.2 % male; 65.8 % African American) that all met the federal definitional standard for living in poverty. A confirmatory factor analysis was run to provide support for the ECBS factor structure. Receiver operating characteristics (ROC) curve analyses were used to test the CBS’s ability to distinguish between 428 clinic-referred children and 245 non-clinic-referred children. Results showed an acceptable fit model for the ECBS, providing further evidence of its construct validity. Optimal cut-scores by child age derived from the ROC curve analyses were provided with corresponding levels of sensitivity, specificity, and positive and negative predictive values. Sensitivity rates for cut scores ranged from 0.76 to 0.83 and specificity rates ranged from 0.88 to 0.95. Acceptable test–retest reliability and good internal consistency also was observed. The CBS quickly identifies young children from low-income, urban, diverse populations that may be at-risk for developing significant behavior disorders and should be considered by health care professionals who work with very young children.     

The effects of choice on intrinsic motivation and related outcomes: a meta-analysis of research findings

A meta-analysis of 41 studies examined the effect of choice on intrinsic motivation and related outcomes in a variety of settings with both child and adult samples. Results indicated that providing choice enhanced intrinsic motivation, effort, task performance, and perceived competence, among other outcomes. Moderator tests revealed the effect of choice on intrinsic motivation was stronger (a) for instructionally irrelevant choices compared to choices made between activities, versions of a task, rewards, and instructionally relevant options, (b) when 2 to 4 successive choices were given, (c) when rewards were not given after the choice manipulation, (d) when participants given choice were compared to the most controlling forms of control groups, (e) for children compared to adults, (f) for designs that yoked choice and control conditions compared to matched designs in which choice was reduced or designs in which nonyoked, nonmatched controls were used, and (g) when the experiment was conducted in a laboratory embedded in a natural setting. Implications for future research and applications to real-world settings are discussed.     

Challenging the Conventional Wisdom: Recent Proposals for the Interpretive Study of Inequality

The conventional wisdom among many sociologists is (1) that it is their prerogative to define, document, and explain the inequalities that exist in society and (2) that there are two general theoretical perspectives useful for studying inequality: functionalism and conflict theory. Some scholars have recently challenged the latter portion of this view by advocating the development of more interpretive, interactionist approaches. However, these scholars' agendas often tend to perpetuate the first half of the conventional wisdom. While interactionists (and other constructionist scholars) can choose to study inequality in any number of ways, I argue that the most distinctive contribution they can make is to focus on the meanings that inequalities have for people in everyday life, as well as how those meanings are achieved.     

Introduction to Judit Mészáros' “Progress and Persecution in the Psychoanalytic Heartland: Antisemitism,Communism, and the Fate of Hungarian Psychoanalysis”

In this introduction, a rationale is developed for why these accounts of the historical movements and catastrophes in psychoanalytic institutional histories are so important. I argue that we need to contextualize theory and practice in political and historical terms, seeing that historical forces shape institutions, the fates of individuals, and the evolution of theory and practice. In particular, I consider the impact of the events in Hungary over nearly 50 years as crucial elements in the eclipse of Ferenczi and his school. I argue that we need to rethink our too-narrow focus on comparative theory and imagine the role of history in the fate of ideas. The impact of fascism and of Stalinism on psychoanalytic work and practitioners is seen here as a necessary element in our understanding of where we are now and from what cultural and historical experiences we have emerged.