Children’s scale errors are a natural consequence of learning to associate objects with actions: A computational model

Young children sometimes attempt an action on an object, which is inappropriate because of the object size—they make scale errors. Existing theories suggest that scale errors may result from immaturities in children's action planning system, which might be overpowered by increased complexity of object representations or developing teleofunctional bias. We used computational modelling to emulate children's learning to associate objects with actions and to select appropriate actions, given object shape and size. A computational Developmental Deep Model of Action and Naming (DDMAN) was built on the dual‐route theory of action selection, in which actions on objects are selected via a direct (nonsemantic or visual) route or an indirect (semantic) route. As in case of children, DDMAN produced scale errors: the number of errors was high at the beginning of training and decreased linearly but did not disappear completely. Inspection of emerging object–action associations revealed that these were coarsely organized by shape, hence leading DDMAN to initially select actions based on shape rather than size. With experience, DDMAN gradually learned to use size in addition to shape when selecting actions. Overall, our simulations demonstrate that children's scale errors are a natural consequence of learning to associate objects with actions.     

A predictive coding model of gaze shifts and the underlying neurophysiology

A comprehensive model of gaze control must account for a number of empirical observations at both the behavioural and neurophysiological levels. The computational model presented in this article can simulate the coordinated movements of the eye, head, and body required to perform horizontal gaze shifts. In doing so it reproduces the predictable relationships between the movements performed by these different degrees of freedom (DOFs) in the primate. The model also accounts for the saccadic undershoot that accompanies large gaze shifts in the biological visual system. It can also account for our perception of a stable external world despite frequent gaze shifts and the ability to perform accurate memory-guided and double-step saccades. The proposed model also simulates peri-saccadic compression: the mis-localization of a briefly presented visual stimulus towards the location that is the target for a saccade. At the neurophysiological level, the proposed model is consistent with the existence of cortical neurons tuned to the retinal, head-centred, body-centred, and world-centred locations of visual stimuli and cortical neurons that have gain-modulated responses to visual stimuli. Finally, the model also successfully accounts for peri-saccadic receptive field (RF) remapping which results in reduced responses to stimuli in the current RF location and an increased sensitivity to stimuli appearing at the location that will be occupied by the RF after the saccade. The proposed model thus offers a unified explanation for this seemingly diverse range of phenomena. Furthermore, as the proposed model is an implementation of the predictive coding theory, it offers a single computational explanation for these phenomena and relates gaze shifts to a wider framework for understanding cortical function.     

Dialoguing Height Psychology into a life of interconnectedness: Response to commentaries by Hwang,Bhawuk, King & Hodgetts,Kashima, and Xie,Su, & Zhong

Liu (Asian Journal of Social Psychology, 000, 000) attempts to articulate an epistemology for the aspirational practice of Height Psychology as a human science informed by Kantian epistemology in dialogue with other philosophies, especially Confucianism and Taoism. Height Psychology is a framework or metatheory for the practice of teaching, research, and service rooted in Kantian epistemology, in dialogue with other philosophies. It provides a holistic philosophy for social scientists responding to wicked problems unfolding over long periods of time. In responding to commentaries, I suggest a corollary to Shweder's (Asian Journal of Social Psychology, 3, p. 207) ‘One mind, many mentalities’: ‘Many indigenous psychologies, interconnected by one epistemology’. Height Psychology is about holding to an invisible moral centre. The practical postulates are foundational to the moral and ethical practices of human societies: they are for doing, their value is ontological. Human agency, proscribed by natural science epistemologies takes centre stage in Height Psychology by facilitating social scientists to act reflexively from multiple positions (from basic to action research) to benefit society. Height Psychology is dedicated to articulating and actioning the moral and ethical basis of a human science that can assist present and future generations of social scientists to meet the grave situational futures facing us in different parts of the world.     

Grasping remaps the distribution of visuospatial attention and enhances competing action activation

We examined how action goals influence the distribution of visuospatial attention near the body (Experiment 1) and how the temporal relationship between distractors and targets modifies shifts in visuospatial attention (Experiment 2). Targets were light emitting diodes (LEDs) in the left and right hemispace of a visual display. Following left or right target illumination, participants reached to point-to or grasp target object in blocked trials. Coincident with target onset, a distractor LED illuminated in the same or opposite hemispace between the initiation point and target, or no distractor appeared. In Experiment 1, during grasping there was a larger temporal interference effect (slower reach initiation) than with pointing. When grasping versus pointing, participants deviated more towards same-side distractors and away from opposite-side distractors. In Experiment 2, distractors onset 200ms prior to (?200-ms), coincident with (0 ms), or 200ms following (+200 ms) the target. For both reach types, ?200-ms distractors had greater onset temporal interference than 0 ms and +200-ms distractors. For grasping, +200 ms distractors had larger temporal interference than 0 ms distractors. For ?200-ms, reach trajectories deviated more towards opposite-side distractors and away from same-side distractors, the reverse of the pattern for 0 ms and +200-ms distractors.     

Agent causation as a solution to the problem of action

My primary aim is to defend a nonreductive solution to the problem of action. I argue that when you are performing an overt bodily action, you are playing an irreducible causal role in bringing about, sustaining, and controlling the movements of your body, a causal role best understood as an instance of agent causation. Thus, the solution that I defend employs a notion of agent causation, though emphatically not in defence of an account of free will, as most theories of agent causation are. Rather, I argue that the notion of agent causation introduced here best explains how it is that you are making your body move during an action, thereby providing a satisfactory solution to the problem of action.     

Polarized Opinions on Racial Progress and Inequality: Measurement and Application to Affirmative Action Preferences

This study presents new measures of opinion about progress toward racial equality and provides a multifaceted rationale for preferring the new measures to the old ones. To reduce several sources of measurement error and improve analytic bite by breaking progress into its constituent elements, surveys should ask about past, present, and ideal conditions, not “progress.” These questions reveal racially polarized opinions: Black and White Americans agree on the goal of equality and agree that conditions were worse in the past, but Blacks think conditions were much worse than Whites do. They especially differ in opinions on current conditions and thus in how much change is required to achieve the goal of equality. Blacks see much more current inequality than Whites do. These opinions help explain preferences for affirmative action (AA). Contrary to previously published findings, reactions to AA do not depend on opinions on progress but depend strongly on something related but distinct: how much current racial conditions differ from the ideal. Implications for theories of policy preferences, racial attitudes, progress, and equality are discussed.     

Political Action in Conflict and Nonconflict Regions in Indonesia: The Role of Religious and National Identifications

This study examined the relationship between group identification and political action in Indonesia. We made four contributions to the literature. First, we studied political action on behalf of religious groups and examined the role of religious identification alone and in combination with national identification. Second, we analyzed political action in a non‐Western country where social cleavages occur primarily along religious lines and where a conflict and nonconflict region can be studied. Third, we compared Muslims and Christians, whose majority and minority status varies across the two regions, and fourth, we investigated both normative and nonnormative forms of political action (protest and violence). In line with the dual‐identification model of politicization, we found that religious identification increased support for protest (but not violence) in the conflict region only and particularly among high national identifiers. In the nonconflict region, religious identification was not related to violence, and it was related to lower support for protest among high national identifiers. The patterns were largely similar for Muslims and Christians, but some differences were found depending on the majority‐minority status. We conclude that particularities of the intergroup context should be taken into consideration when studying politicization.     

Influence of gait mode and body orientation on following a walking avatar

Regulating distance with a moving object or person is a key component of human movement and of skillful interpersonal coordination. The current set of experiments aimed to assess the role of gait mode and body orientation on distance regulation using a cyclical locomotor tracking task in which participants followed a virtual leader. In the first experiment, participants moved in the backward-forward direction while the body orientation of the virtual leader was manipulated (i.e., facing towards, or away from the follower), hence imposing an incongruence in gait mode between leader and follower. Distance regulation was spatially less accurate when followers walked backwards. Additionally, a clear trade-off was found between spatial leader-follower accuracy and temporal synchrony. Any perceptual effects were overshadowed by the effect of one’s gait mode. In the second experiment we examined lateral following. The results suggested that lateral following was also constrained strongly by perceptual information presented by the leader. Together, these findings demonstrated how locomotor tracking depends on gait mode, but also on the body orientation of whoever is being followed.     

Unpleasant stimuli differentially modulate inhibitory processes in an emotional Go/NoGo task: an event-related potential study

Threat stimuli typically elicit a psychophysiological response pattern supporting the organism's preparation for active defence. Differently, blood stimuli prompt a distinctive autonomic response pattern and sustained processing, which do not call for clear-cut mobilisation for action. However, the contribution of motor disposition in these response patterns remains unclear. One way to address this issue is to investigate whether threat and blood stimuli differentially affect the active suppression of an ongoing motor activity. Thirty-two undergraduates were presented with threat, mutilation, pleasant, and neutral pictures in an emotional Go/NoGo task. The amplitudes of the NoGo-N2 and NoGo-P3 components of the event-related potentials were analysed as indices of conflict monitoring and inhibition of motor response, respectively. Reaction times to Go trials were significantly faster for threat than for mutilations. The NoGo-N2 was significantly larger to threat than to mutilations, whereas the NoGo-P3amplitude did not differ between the two conditions. These findings suggest that threat stimuli facilitated the execution of a prepotent response and enhanced conflict monitoring when action must be withheld. In contrast, blood stimuli did not either promote action in the Go trials or increase conflict in the NoGo condition, suggesting a response pattern compatible with defensive immobility.