Visual Duration but Not Numerosity Is Distorted While Running

There is increasing evidence that action and perception interact in the processing of magnitudes such as duration and numerosity. Sustained physical exercise (such as running or cycling) increases the apparent duration of visual stimuli presented during the activity. However, the effect of exercise on numerosity perception has not yet been investigated. Here, we asked participants to make either a temporal or a numerical judgment by comparing the duration or numerosity of standard stimuli displayed at rest with those presented while running. The results support previous reports in showing that physical activity significantly expands perceived duration; however, it had no effect on perceived numerosity. Furthermore, the distortions of the perceived durations vanished soon after the running session, making it unlikely that physiological factors such as heart rate underlie the temporal distortion. Taken together, these results suggest a domain-selective influence of the motor system on the perception of time, rather than a general effect on magnitude.

Neuronal cell-type and circuit basis for visual predictive processing

Bayesian Brain theory suggests brain utilises predictive processing framework to interpret the noisy world. Predictive processing is essential to perception, action, cognition and psychiatric disease, but underlying neural circuit mechanisms remain undelineated. Here we show the neuronal cell-type and circuit basis for visual predictive processing in awake, head-fixed mice during self-initiated running. Preceding running, vasoactive intestinal peptide (VIP)-expressing inhibitory interneurons (INs) in primary visual cortex (V1) are robustly activated in absence of structured visual stimuli. This pre-running activation is mediated via distal top-down projections from frontal, parietal and retrosplenial areas known for motion planning, but not local excitatory inputs associated with the bottom-up pathway. Somatostatin (SST) INs show pre-running suppression and post-running activation, indicating a VIP-SST motif. Differential VIP-SST peri-running dynamics anisotropically suppress neighbouring pyramidal (Pyr) neurons, preadapting Pyr neurons to the incoming running. Our data delineate key neuron types and circuit elements of predictive processing brain employs in action and perception.

Imaginative Leadership: A Conceptual Frame for the Design and Facilitation of Creative Methods and Generative Engagement

In the field of sustainability science, many scholars and practitioners are embracing a ‘humanistic turn’ that draws from psychology and cognitive sciences and from the arts and humanities. Contributing to a spirit of ‘exuberant experimentation’ in the field, this chapter asks: How can creative methods of engagement be operationalized to support the imaginative capacity of researchers and practitioners in the arena of sustainability? In order to address this question, I (a) propose the concept of imaginative leadership to describe the ability to understand and consciously influence the symbolic/metaphorical dimensions of self and others, and (b) explore the process of designing workshops that employ creative methods rooted in ‘transformative mindsets.’ Transformative mindsets refer to specific conceptual frames identified for their potential to disrupt default unsustainable and anthropocentric worldviews and open new spaces of possibility for action and perception. The broad goal of these workshops was to support imaginative leadership towards regenerative sustainability through collaborative experimentation with unconventional methods. Informed by research on metaphorical thinking, somatics, neurocognitive linguistics, and arts-based environmental education, the methods were designed to activate a set of specific transformative mindsets, which were subsequently refined through the process of experimentation and co-reflection during and after the workshops.

Architectural Affordances

In the article discussed in this chapter, the authors describe a framework of neuroaesthetics for architectural experiences that considers sensory feedback stemming from movement central for the experience of the built environment. As we move through space when experiencing architecture, our sensory impressions change, rendering the body and the brain as nondissociable agents of aesthetic experience. This interaction is described by the term affordance. The authors cast the human experience of the built environment to be predicated on the functional relation between action and perception and developed a neuroscientific experiment on architectural transitions to investigate how the human brain reflects architectural affordances. They found that varying sizes of transitions, reflecting different affordances, impact early perceptual processes, suggesting that our perception is indeed colored by the action potentials afforded by the composed space. In conclusion, the shape of space resonates with our embodied predictions regarding movement.

Sensing the Sacred: Religious Experience, Somatic Inversions, and the Religious Education of Attention

While previous work has focused largely on discourse, contemporary sociological research has started to examine how the embodied, sensory dimensions of religious practice matter in the construction of religious experience. This paper contributes to this development by drawing sociological attention to the religious cultivation of a particular class of embodied experiences: somatic inversions. Somatic inversions, as we define them, are experiences in which dimensions of human embodiment that usually remain in the tacit background of action and perception are brought to the experiential foreground. We demonstrate how these kinds of practically cultivated experiences of inversion—while not religious in any essential way—enable and encourage attributions of religious significance, making purportedly religious phenomena present to the senses and open to further engagement, exploration, and elaboration. We develop our argument through empirical material from the authors’ respective studies of Eastern Orthodox fasting and Theravada Buddhist meditation practices.

Flows of Inhomogeneous Matter: Improvising an augmented violin

This article reflects on how personal digital musical instruments evolve and presents an augmented violin developed and performed by the author in improvised performance as an example. Informed by the materialism of Gilles Deleuze and Felix Guattari, an image of ‘flows of inhomogeneous matter’ provokes reflection on a mode of production common to artisanal craftmanship and digital lutherie alike, namely the pre-reflective skilfulness negotiating the singularities of inhomogeneous matter with the demands of the production – a process which itself may be thought of as im-pro-visation (‘un-fore-seen’). According to Gilbert Simondon, all technical objects develop in this way: functional interdependency emerges when abstractly ideated elements begin to enter into unanticipated synergistic relationships, suggesting a material logic dependent on unforeseen potentialities. The historical development of the acoustic violin exemplifies such an evolution, with, like all technical objects, additional latent potential. Digital artists can work like artisanal craftsmen in tinkering with technical elements, teasing out their synergies through abductive, trial-and-error experimentation. In the context of developing digital musical instruments, model-free design of real-time digital signal processing symmetrising action and perception yields highly refined results. Like musical improvisation – constrained by time – improvised development of these instruments turns the material obstacles into their very means of realisation.

Affordance as general value function: a computational model

General value functions (GVFs) in the reinforcement learning (RL) literature are long-term predictive summaries of the outcomes of agents following specific policies in the environment. Affordances as perceived action possibilities with specific valence may be cast into predicted policy-relative goodness and modeled as GVFs. A systematic explication of this connection shows that GVFs and especially their deep-learning embodiments (1) realize affordance prediction as a form of direct perception, (2) illuminate the fundamental connection between action and perception in affordance, and (3) offer a scalable way to learn affordances using RL methods. Through an extensive review of existing literature on GVF applications and representative affordance research in robotics, we demonstrate that GVFs provide the right framework for learning affordances in real-world applications. In addition, we highlight a few new avenues of research opened up by the perspective of “affordance as GVF,” including using GVFs for orchestrating complex behaviors.

Different effects of spatial separation in action and perception

Spatial distance of response keys has been shown to have an effect on nonspatial tasks in that performance improved if the spatial distance increased. Comparably, spatial distance of stimulus features has been shown to have a performance-improving effect in a (partly) spatial task. Here, we combined these two findings in the same task to test for the commonality of the effect of stimulus distance and the effect of response distance. Thus, we varied spatial distance in exactly the same fashion either between stimuli or between responses in a standard Eriksen flanker task. The results show that spatial distance only affected the processing of stimulus features, while it had no effect on the processing of response features. Regarding the idea of common coding of action and perception (Prinz, 1990), stimulus and response processing should be influenced by spatial distance in the same way so that our data might suggest a boundary for the idea of common coding.