Visual action control does not rely on strangers—Effects of pictorial cues under monocular and binocular vision

Borchers, Svenja; Christensen, Andrea; Ziegler, Lisa; Himmelbach, Marc

doi:10.1016/j.neuropsychologia.2010.12.018

Cited by 6 publications

(13 citation statements)

References 18 publications

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“…Hence, we now presented the same matchboxes that were used by McIntosh & Lashley [11] to German students that have never seen them before. We expected an effect of familiar size during monocular viewing based on the preceding reports [6], [11], [12]. If we find that the familiar size cue is used under binocular vision as well, then this would suggest that visual complexity and the distinctness of objects increases their reliability weighting for motor computations.…”

Section: Introductionmentioning

confidence: 89%

“…We used the same setup that was used by McIntosh & Lashley [11] and Borchers et al [12]. Subjects sat at a table with a white backdrop at 70 cm distance from the eyes (100 cm x 180 cm) that filled the entire field of view.…”

Section: Methodsmentioning

confidence: 99%

“…Movement offset was determined from the acceleration profile of the wrist marker, using the second zero crossing as the endpoint of the trajectory. As in Borchers et al [12] we have chosen a criterion different from McIntosh & Lashley [11] because most of our subjects produced a pretty smooth transition between grasping the object and taking it from the rod. Therefore, resultant tangential velocity frequently did not fall below 50 mm/s although the object was already successfully grasped.…”

Section: Methodsmentioning

confidence: 99%

“…Thus, we concluded that indeed the reported familiarity effect was probably not simply due to a short term learning process. However, the stimuli used by Borchers et al [12] differed in visual complexity from those used by McIntosh & Lashley [11]. The original matchboxes were not only distinguishable by their primary colour but additionally were clearly different in their surface patterns and local contrasts.…”

Section: Introductionmentioning

confidence: 95%

“…by stable object representations that were formed by prior experience with the respective objects in everyday life, we repeated the same experiment with geometrical cuboids [12]. These cuboids with exactly the same dimensions as the matchboxes were coloured and unfamiliar to the participants prior to the experiment.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Pictorial Cues on Reaching Depend on the Distinctiveness of Target Objects

2013

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There is an ongoing debate under what conditions learned object sizes influence visuomotor control under preserved stereovision. Using meaningful objects (matchboxes of locally well-known brands in the UK) a previous study has nicely shown that the recognition of these objects influences action programming by means of reach amplitude and grasp pre-shaping even under binocular vision. Using the same paradigm, we demonstrated that short-term learning of colour-size associations was not sufficient to induce any visuomotor effects under binocular viewing conditions. Now we used the same matchboxes, for which the familiarity effect was shown in the UK, with German participants who have never seen these objects before. We addressed the question whether simply a high degree of distinctness, or whether instead actual prior familiarity of these objects, are required to affect motor computations. We found that under monocular and binocular viewing conditions the learned size and location influenced the amplitude of the reaching component significantly. In contrast, the maximum grip aperture remained unaffected for binocular vision. We conclude that visual distinctness is sufficient to form reliable associations in short-term learning to influence reaching even for preserved stereovision. Grasp pre-shaping instead seems to be less susceptible to such perceptual effects.

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Section: Introductionmentioning

confidence: 89%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Effects of Pictorial Cues on Reaching Depend on the Distinctiveness of Target Objects

2013

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Some binocular advantages for planning reach, but not grasp, components of prehension

Grant

Conway

2019

Exp Brain Res

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Proficient (fast, accurate, precise) hand actions for reaching-to-grasp 3D objects are known to benefit significantly from the use of binocular vision compared to one eye alone. We examined whether these binocular advantages derive from increased reliability in encoding the goal object’s properties for feedforward planning of prehension movements or from enhanced feedback mediating their online control. Adult participants reached for, precision grasped and lifted cylindrical table-top objects (two sizes, 2 distances) using binocular vision or only their dominant/sighting eye or their non-dominant eye to program and fully execute their movements or using each of the three viewing conditions only to plan their reach-to-grasp during a 1 s preview, with vision occluded just before movement onset. Various kinematic measures of reaching and grasping proficiency, including corrective error rates, were quantified and compared by view, feedback and object type. Some significant benefits of binocular over monocular vision when they were just available for pre-movement planning were retained for the reach regardless of target distance, including higher peak velocities, straighter paths and shorter low velocity approach times, although these latter were contaminated by more velocity corrections and by poorer coordination with object contact. By contrast, virtually all binocular advantages for grasping, including improvements in peak grip aperture scaling, the accuracy and precision of digit placements at object contact and shorter grip application times preceding the lift, were eliminated with no feedback available, outcomes that were influenced by the object’s size. We argue that vergence cues can improve the reliability of binocular internal representations of object distance for the feedforward programming of hand transport, whereas the major benefits of binocular vision for enhancing grasping performance derive exclusively from its continuous presence online.

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Entity Realism About Mental Representations

Nánay

2019

Erkenn

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The concept of mental representation has long been considered to be central concept of philosophy of mind and cognitive science. But not everyone agrees. Neo-behaviorists aim to explain the mind (or some subset thereof) without positing any representations. My aim here is not to assess the merits and demerits of neo-behaviorism, but to take their challenge seriously and ask the question: What justifies the attribution of representations to an agent? Both representationalists and neo-behaviorists tend to take it for granted that the real question about representations is whether we should be realist about the theory of representationalism. This paper is an attempt to shift the emphasis from the debate concerning realism about theories to the one concerning realism about entities. My claim is that regardless of whether we are realist about representational theories of the mind, we have compelling reasons to endorse entity realism about mental representations.

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Visual action control does not rely on strangers—Effects of pictorial cues under monocular and binocular vision

Cited by 6 publications

References 18 publications

Effects of Pictorial Cues on Reaching Depend on the Distinctiveness of Target Objects

Effects of Pictorial Cues on Reaching Depend on the Distinctiveness of Target Objects

Some binocular advantages for planning reach, but not grasp, components of prehension

Entity Realism About Mental Representations

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