Weber's law in grasping
نویسندگان
چکیده
منابع مشابه
Weber's law in grasping.
In their reply to our recent paper published in the Journal of Vision (Ganel, Freud, & Meiran, 2014), Heath, Jazi, and Holmes (2015) provide what seems to be a psychophysical interpretation of Weber’s law. Yet their interpretation does not refer to the stimulus and to changes in its size, the true purview of Weber’s law. Heath et al. (2015) focus on the distance between the fingers—a response m...
متن کاملGrasping Weber's law
will obey Weber’s law, but that the perceived locations of its endpoints will not. The judgments underlying this inconsistency coexist in our brain without being noticed, but they are revealed when a task that mainly relies on the locations of a line’s endpoints is compared with one that mainly relies on the length of the same line [3,4]. This distinction between position and size is essential ...
متن کاملResponse: When does grasping escape Weber's law?
Weber fraction for size, we combine it with a visual precision for position σ vp = 1.8 mm. The curves in Figure 1 show the outcome of this simple model. The fact that we can describe the experimental curves for three different tasks with only four parameters is a first step towards quantitative support of our interpretation of the data. The second step is to check whether the values of the para...
متن کاملBiomechanical factors may explain why grasping violates Weber’s law
For grasping, Ganel, Chajut, and Algom (2008) demonstrated that the variability of the maximum grip aperture (MGA) does not increase with the size of the target object. This seems to violate Weber's law, a fundamental law of psychophysics. They concluded that the visual representations guiding grasping are distinct from representations used for perceptual judgments. Weber's law is however only ...
متن کاملGrasping time does not influence the early adherence of aperture shaping to Weber's law
The "just noticeable difference" (JND) represents the minimum amount by which a stimulus must change to produce a noticeable variation in one's perceptual experience (i.e., Weber's law). Recent work has shown that within-participant standard deviations of grip aperture (i.e., JNDs) increase linearly with increasing object size during the early, but not the late, stages of goal-directed grasping...
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ژورنال
عنوان ژورنال: Journal of Vision
سال: 2015
ISSN: 1534-7362
DOI: 10.1167/15.8.18