Interobject spacing explains the attentional bias toward interacting objects

Spatio-temporal interactions between simple geometrical shapes typically elicit strong impressions of intentionality. Recent research has started to explore the link between attentional processes and the detection of interacting objects. Here, we asked whether visual attention is biased toward such interactions. We investigated probe discrimination performance in algorithmically generated animations that involved two chasing objects and two randomly moving objects. In Experiment 1, we observed a pronounced attention capture effect for chasing objects. Because reduced interobject spacing is an inherent feature of interacting objects, in Experiment 2 we designed randomly moving objects that were matched to the chasing objects with respect to interobject spacing at probe onset. In this experiment, the capture effect attenuated completely. Therefore, we argue that reduced interobject spacing reflects an efficient cue to guide visual attention toward objects that interact intentionally.     

Oculomotion mediates attentional guidance toward temporarily close objects

Previous research has identified multiple features of individual objects that are capable of guiding visual attention. However, in dynamic multi-element displays not only individual object features but also changing spatial relations between two or more objects might signal relevance. Here we report a series of experiments that investigated the hypothesis that reduced inter-object spacing guides visual attention toward the corresponding objects. Our participants discriminated between different probes that appeared on moving objects while we manipulated spatial proximity between the objects at the moment of probe onset. Indeed, our results confirm that there is a bias toward temporarily close objects, which persists even when such a bias is harmful for the actual task (Experiments 1a and 1b). Remarkably, this bias is mediated by oculomotor processes. Controlling for eye-movements reverses the pattern of results (Experiment 2a), whereas the location of the gaze tends toward the temporarily close objects under free viewing conditions (Experiment 2b). Taken together, our results provide insights into the interplay of attentional and oculomotor processes during dynamic scene processing. Thereby, they also add to the growing body of evidence showing that within dynamic perception, attentional and oculomotor processes act conjointly and are hardly separable.     

First‐time viewers' comprehension of films: Bridging shot transitions

Which perceptual and cognitive prerequisites must be met in order to be able to comprehend a film is still unresolved and a controversial issue. In order to gain some insights into this issue, our field experiment investigates how first‐time adult viewers extract and integrate meaningful information across film cuts. Three major types of commonalities between adjacent shots were differentiated, which may help first‐time viewers with bridging the shots: pictorial, causal, and conceptual. Twenty first‐time, 20 low‐experienced and 20 high‐experienced viewers from Turkey were shown a set of short film clips containing these three kinds of commonalities. Film clips conformed also to the principles of continuity editing. Analyses of viewers' spontaneous interpretations show that first‐time viewers indeed are able to notice basic pictorial (object identity), causal (chains of activity), as well as conceptual (links between gaze direction and object attention) commonalities between shots due to their close relationship with everyday perception and cognition. However, first‐time viewers' comprehension of the commonalities is to a large degree fragile, indicating the lack of a basic notion of what constitutes a film.     

J. S. Mill on Coolie Labour and Voluntary Slavery

This article discusses John Stuart Mill's voluntary slavery argument in On Liberty. The author shows that standard interpretations of the argument rely on the assumption that part of Mill's objection to voluntary slavery is the permanent nature of the decision. However, in correspondence, Mill also objects to voluntary ‘coolie’ labour contracts, which he regards as a form of slavery. This produces difficulties for standard interpretations of the voluntary slavery argument. Finally, the author provides a revised interpretation of Mill's argument to solve this problem.     

Continuous visual cues trigger automatic spatial target updating in dynamic scenes

Dynamic tasks often require fast adaptations to new viewpoints. It has been shown that automatic spatial updating is triggered by proprioceptive motion cues. Here, we demonstrate that purely visual cues are sufficient to trigger automatic updating. In five experiments, we examined spatial updating in a dynamic attention task in which participants had to track three objects across scene rotations that occurred while the objects were temporarily invisible. The objects moved on a floor plane acting as a reference frame and unpredictably either were relocated when reference frame rotations occurred or remained in place. Although participants were aware of this dissociation they were unable to ignore continuous visual cues about scene rotations (Experiments 1a and 1b). This even held when common rotations of floor plane and objects were less likely than a dissociated rotation (Experiments 2a and 2b). However, identifying only the spatial reference direction was not sufficient to trigger updating (Experiment 3). Thus we conclude that automatic spatial target updating occurs with pure visual information.     

Representation of dynamic spatial configurations in visual short-term memory

Locations of multiple stationary objects are represented on the basis of their global spatial configuration in visual short-term memory (VSTM). Once objects move individually, they form a global spatial configuration with varying spatial inter-object relations over time. The representation of such dynamic spatial configurations in VSTM was investigated in six experiments. Participants memorized a scene with six moving and/or stationary objects and performed a location change detection task for one object specified during the probing phase. The spatial configuration of the objects was manipulated between memory phase and probing phase. Full spatial configurations showing all objects caused higher change detection performance than did no or partial spatial configurations for static and dynamic scenes. The representation of dynamic scenes in VSTM is therefore also based on their global spatial configuration. The variation of the spatiotemporal features of the objects demonstrated that spatiotemporal features of dynamic spatial configurations are represented in VSTM. The presentation of conflicting spatiotemporal cues interfered with memory retrieval. However, missing or conforming spatiotemporal cues triggered memory retrieval of dynamic spatial configurations. The configurational representation of stationary and moving objects was based on a single spatial configuration, indicating that static spatial configurations are a special case of dynamic spatial configurations.     

The cognitive representation of filmic event summaries

The present study compared two types of film summaries and a complete film event portrayal of two different event sequences, measuring their perceived structure during presentation and the subsequent ability to recall them. The summaries were based on the model of behavioural perception (Newtson & Engquist, 1976; Zacks & Tversky, 2001) and either retained the borders (breakpoints) or the middle parts (non‐breakpoints) of each segment of the event sequence. It was found that breakpoint‐keeping summaries were perceived to be more structured and were recalled more coherently and comprehensively than non‐breakpoint‐keeping summaries. On the other hand, breakpoint‐keeping summaries were not recalled any more completely than event portrayals that had not been shortened. Also, breakpoint‐keeping summaries showed only moderate overlap in their recalled event steps. Copyright © 2003 John Wiley & Sons, Ltd.     

Body,environment and adventure: experience and spatiality

The purpose of this article is to investigate human spatiality and perception in general, with the experience of adventure sports as its background. These activities highlight especially our strong relationship with the world when we consider the specific way in which the environment participates in the development of human potential. We first analyse the notions of risk and instability as important elements in adventure sports. Then we explore the notion of experience and spatiality, considering the way in which we establish our relationship with the world. The theoretical background is found in the phenomenology of Merleau-Ponty and Bachelard’s phenomenology of imagination to investigate perspectives of space among adventurers. We hold that more than a different range of corporeal techniques, adventure sports can teach us a way of interrogating and looking at the world. They require a peculiar sensibility that allows our body to experience the environment in favour of a corporeal wisdom. Alternative sports indicate the possibility that we have to build up different ways of inhabiting the world and comprehending it.