Redundancy and reduction: Speakers manage syntactic information density

A principle of efficient language production based on information theoretic considerations is proposed: Uniform Information Density predicts that language production is affected by a preference to distribute information uniformly across the linguistic signal. This prediction is tested against data from syntactic reduction. A single multilevel logit model analysis of naturally distributed data from a corpus of spontaneous speech is used to assess the effect of information density on complementizer that-mentioning, while simultaneously evaluating the predictions of several influential alternative accounts: availability, ambiguity avoidance, and dependency processing accounts. Information density emerges as an important predictor of speakers’ preferences during production. As information is defined in terms of probabilities, it follows that production is probability-sensitive, in that speakers’ preferences are affected by the contextual probability of syntactic structures. The merits of a corpus-based approach to the study of language production are discussed as well.     

Glucose consumption decreases impulsive aggression in response to provocation in aggressive individuals

Impaired executive control is implicated in aggression. Research suggests that the acute administration of glucose can improve executive control. In two experiments undergraduates completed a measure of trait aggression and consumed a glucose or placebo beverage before being given the chance to administer a blast of white noise to a fictitious participant. In Experiment 1, all participants were provoked and mentally depleted or not. Glucose was most effective in reducing aggression for those high in trait aggression even when depleted. In Experiment 2, participants were provoked or not. When provoked, glucose reduced aggression among those high in trait aggression. However, when not provoked, glucose increased aggression among those high in trait aggression. These data suggest that the acute administration of glucose can be beneficial in reducing aggression in response to provocation among those high in trait aggression.     

Reactive and Proactive Aggression in Childhood and Adolescence: Precursors, Outcomes, Processes, Experiences, and Measurement

ABSTRACT. This paper reviews and critiques the growing literature on the distinction between reactive and proactive aggression in children and adolescents. Empirical findings suggest that the subtypes of aggression are (a) preceded by different familial precursors, (b) associated with different behavioral outcomes, (c) driven by different social–cognitive and emotional processes, and (d) related to different social experiences. Because measurement difficulties have been a prominent concern in the study of reactive and proactive aggression, a discussion of various assessment approaches is included. Suggestions are made for future research directions, including a greater use of observational and laboratory-based methods, more longitudinal designs, and a greater focus on the careful assessment of the subtypes of aggression.     

Alignment with the horizontal plane: evidence for an orientation constraint in the perception of shape

In order to convert a 2-D image to a 3-D percept, the visual system must apply constraints that maximize the chances that the result will be unique and veridical. Previously proposed constraints include one that maximizes the symmetry of the percept, and one that maximizes its compactness (Li et al, 2009 Vision Research 49 979-991). Analysis of the 3-D percepts elicited by certain 2-D forms suggests the action of an additional constraint, favoring the alignment of the surfaces and/or axis of symmetry of the perceived object with the horizontal plane.     

Nested prospectivity in perception: perceived maximum reaching height reflects anticipated changes in reaching ability

Perception of possibilities for behavior is a necessarily prospective (i.e., forward-looking) act. Such prospectivity is highlighted by the fact that, in general, behaviors are nested within behaviors over a number of spatial and temporal scales. Participants reported their maximum vertical reaching height when they expected to walk across the room and (1) reach for an object while standing on the floor, (2) step up on a step stool and then reach for the object, and (3) pick up a plastic rod and use it to reach for the object. The results show that perception of maximum reaching height was action scaled both when participants expected to perform a nested behavior that would change their action capabilities and when they expected to perform a nested behavior that would not do so. Moreover, the results suggest that nested behaviors that change reaching ability in functionally equivalent ways may bring about functionally equivalent changes in perception of maximum reaching height.     

Impact of Peer Partner Support on Self Efficacy for Justice-Involved Parents: A Controlled Study of Juvenile Justice 101

Systems of care and other health-related initiatives have encouraged the proliferation of parent support policies in mental health, child welfare and education systems. However, the juvenile court system has relatively few programs that provide direct peer support for parents and little is known about the impact of parent support on families navigating the court process. Juvenile Justice 101 is one of only a few such programs. The present study examined the effect of the peer support element of Juvenile Justice 101 compared to video-only and no intervention conditions in a pre/post-test design. One hundred and ten parents agreed to participate in the study, 54 on a day with the peer support condition, 28 on a video-only day and 28 on a no-intervention day. Sixteen parents in the peer support condition were able to participate in the full program and seven parents in the video-only condition participated in the full video. Analyses disaggregate the effects of condition assignment and participation. Self-efficacy in navigating the juvenile court process improved for parents who participated in peer support but no improvement was observed for the other conditions. Parents in the peer support condition also rated peer partners higher than court staff on a dimension assessing process of care. The implications for practice and policy for peer support and family-driven services in juvenile court are discussed.     

Examining attitudes,beliefs, and intentions regarding the use of exercise as punishment in physical education and sport: an application of the theory of reasoned action

Although the use of exercise as punishment appears to be pervasive among physical education teachers and coaches, it has not been systematically examined. The purpose of this study was to examine the experiences, attitudes, intentions, and beliefs of college physical education majors regarding the use of exercise as punishment, using the framework of the theory of reasoned action. Surveys were completed by 345 students enrolled in 35 physical education classes. More than 90% of the study participants reported that their coaches used exercise as punishment, and 43% indicated their physical education teachers used exercise to punish or manage behavior. The constructs of the theory of reasoned action explained nearly 70% of the variance in participants' intentions to use exercise as punishment.