Different Pedagogy,Different Politics: High School Learning Opportunities and Youth Political Engagement

Using data from an original two‐wave panel survey of California high school students and a two‐wave panel survey of high school students in Chicago, we find that different pedagogical approaches influence different forms of civic and political engagement. Specifically, controlling for prior levels of engagement and demographic factors, we find that open discussion of societal issues promotes engagement with political issues and elections. In contrast, service learning opportunities increase community‐based and expressive actions. Both kinds of opportunities promoted commitments to participatory citizenship. These patterns can teach us about the kinds of opportunities (both in school and out) that can shape adolescents' civic and political development.     

Coherent plaids are preattentively more than the sum of their parts

We investigated whether plaids activate preattentive mechanisms that are distinct from those activated by their component gratings. Observers searched for a target plaid, the sum of two perpendicular components in a circular window (radius = 0.65°). The target was present on half the trials. On all trials, half of the distractors had the same frequency and orientation as one component of the plaid, and the rest were the same as the other component. The target and the distractors were arrayed evenly on a circle (radius = 2.36°) around fixation. Target and distractor contrasts were randomly perturbed up to ±30%. The following results held for each of the 6 participants tested. (1) When F1 = 2 c/deg and F2 = 5.25 c/deg, response times (RTs) increased significantly when set size (number of distractors plus target, if present) was increased from four to eight. (2) When the spatial frequencies of both plaid components were the same (i.e., both 2 c/deg or both 5.25 c/deg), RTs increased very slightly, if at all, when set size was increased from four to eight. These results suggest the existence of a preattentive, plaid-sensitive mechanism with band-limited input that does not respond to individual grating components.     

Representation and Reasoning about Evolutions of the World in the Context of Reasoning about Actions

The first step in reasoning about actions and change involves reasoning about how the world would evolve if a certain action is executed in a certain state. Most research on this assumes the evolution to be only a single step and focus on formulating the transition function that defines changes between states due to actions. In this paper we consider cases where the evolution is more than just a single change between one state and another. This is manifested when the execution of an action may trigger execution of other actions, or when multiple agents act on the environment following certain strategies.     

Electromyographic evidence of neurological controller signals with viscous load

Ensemble averaging after pre-editing of surface EMG potentials has enabled construction of underlying controller signals from stereotyped head movements. Carefully controlled, intended time-optimal movements by trained, actively participating human subjects have been found to yield repeatable, multi-pulse controller signals. Also, adaptive changes in these horizontal head movements in response to added viscous loads showed further causal relationships between movement dynamics and EMG signals from left and right splenius muscles. These experimental results are a base from which modeling studies can be performed to explicate the neurological control strategies used in the performance of this class of movements.     

Individual and Contextual Predictors of Creative Performance: The Mediating Role of Psychological Processes

Studies on creativity have identified critical individual and contextual variables that contribute to individuals' creative performance. However, the psychological mechanisms through which these factors influence creative performance have not yet been systematically investigated. This study explored potential psychological processes that mediate the effects of various individual and contextual variables on the creative performance of individuals. The results, based on longitudinal, multisource data, show that underlying psychological processes (creative self-efficacy and creativity intention) completely mediated the effect of individual (motivation, personality, ability) and contextual factors (social influences from leaders and peers) on creative performance. This study informs the literature of potential psychological mechanisms through which individual and contextual factors influence the creative performance of individuals.     

Effects of motor intention on the perception of somatosensory events: a behavioural and functional magnetic resonance imaging study

The intention to execute a movement can modulate our perception of sensory events, and this modulation is observed ahead of both ocular and upper limb movements. However, theoretical accounts of these effects, and also the empirical data, are often contradictory. Accounts of "active touch", and the premotor theory of attention, have emphasized how movement intention leads to enhanced perceptual processing at the target of a movement, or on the to-be-moved effector. By contrast, recent theories of motor control emphasize how internal "forward" model (FM) estimates may be used to cancel or attenuate sensory signals that arise as a result of self-generated movements. We used behavioural and functional brain imaging (functional magnetic resonance imaging, fMRI) to investigate how perception of a somatosensory stimulus differed according to whether it was delivered to a hand that was about to execute a reaching movement or the alternative, nonmoving, hand. The results of our study demonstrate that a somatosensory stimulus delivered to a hand that is being prepared for movement is perceived to have occurred later than when that same stimulus is delivered to a nonmoving hand. This result indicates that it takes longer for a tactile stimulus to be detected when it is delivered to a moving limb and may correspond to a change in perceptual threshold. Our behavioural results are paralleled by the results of our fMRI study that demonstrated that there were significantly reduced blood-oxygen-level-dependent (BOLD) responses within the parietal operculum and insula following somatosensory stimulation of the hand being prepared for movement, compared to when an identical stimulus was delivered to a nonmoving hand. These findings are consistent with the prediction of FM accounts of motor control that postulate that central sensory suppression of somatosensation accompanies self-generated limb movements, and with previous reports indicating that effects of sensory suppression are observed in higher order somatosensory regions.     

Contagious leaders and followers: Exploring multi-stage mood contagion in a leader activation and member propagation (LAMP) model

A theoretical framework is offered to explain mood contagion processes in groups. Specifically, we describe and test a two-stage leader activation and member propagation (LAMP) model that starts with the activation of the contagion process by leaders (Stage 1), followed by the mutual propagation of the mood among members (Stage 2). Results from 102 self-managing groups provide support for the LAMP model. Group mood convergence was negatively related to attribute diversity (in extroversion and neuroticism) between the leader and group members (Stage 1) and among group members (Stage 2). In both stages, group members’ susceptibility to emotional contagion and interpersonal attraction had positive main effects on group mood convergence, and moderated the relationship between attribute diversity and mood convergence in groups. The findings offer new insights into group mood convergence, as it unfolds over time.