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A Brief Taxonomy of Tactile Illusions and Demonstrations That Can Be Done In a Hardware Store,
- Brain Research Bulletin,
, 2008
"... Abstract This paper surveys more than twenty types of tactile illusions and discusses several of their aspects. These aspects include the ease with which they can be demonstrated and whether they have clear visual analogs. The paper also shows how to construct equipment made of simple supplies able ..."
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Cited by 24 (7 self)
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Abstract This paper surveys more than twenty types of tactile illusions and discusses several of their aspects. These aspects include the ease with which they can be demonstrated and whether they have clear visual analogs. The paper also shows how to construct equipment made of simple supplies able to deliver well controlled tactile signals in order to conveniently demonstrate four different tactile illusions.
Toward a formal theory of flexible spatial behavior: Geometric category biases generalize across pointing and verbal response types
- Journal of Experimental Psychology: Human Perception and Performance
, 2006
"... Three experiments tested whether geometric biases—biases away from perceived reference axes— reported in spatial recall tasks with pointing responses generalized to a recognition task that required a verbal response. Seven-year-olds and adults remembered the location of a dot within a rectangle and ..."
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Cited by 17 (6 self)
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Three experiments tested whether geometric biases—biases away from perceived reference axes— reported in spatial recall tasks with pointing responses generalized to a recognition task that required a verbal response. Seven-year-olds and adults remembered the location of a dot within a rectangle and then either reproduced its location or verbally selected a matching choice dot from a set of colored options. Results demonstrated that geometric biases generalized to verbal responses; however, the spatial span of the choice set influenced performance as well. These data suggest that the same spatial memory process gives rise to both response types in this task. Simulations of a dynamic field model buttress this claim. More generally, these results challenge accounts that posit separate spatial systems for motor and verbal responses.
Dissociation between location and shape in visual space
- Journal 570 PRESENCE: VOLUME 13, NUMBER 5 of Experimental Psychology: Human Perception and Performance
, 2002
"... There are often large perceptual distortions of shapes lying on the ground plane, even in well-lit environments. These distortions occur under conditions for which the perception of location is accurate. Four hypotheses are considered for reconciling these seemingly paradoxical results, after which ..."
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Cited by 16 (1 self)
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There are often large perceptual distortions of shapes lying on the ground plane, even in well-lit environments. These distortions occur under conditions for which the perception of location is accurate. Four hypotheses are considered for reconciling these seemingly paradoxical results, after which 2 experiments are reported that lend further support to 1 of them—that perception of shape and perception of location are sometimes dissociable. The 2 experiments show that whereas perception of location does not depend on whether viewing is monocular or binocular (when other distance cues are abundant), perception of shape becomes more veridical when viewing is binocular. This means that perception of shape is not fully constrained by the perceived locations of the vertices that define the shape. Striking failures of shape constancy are commonplace in natural environments viewed under full cues. As an example, Figure 1 shows two views of a portion of a popular walkway in Barcelona, Spain. The gray and white tiles define a sinusoidal profile of constant modulation depth (in the direction of the walkway) and constant wavelength (in the orthogonal direction). Conflicting sharply with the constant physical depth modulation is the strong
Are the original Roelofs effect and the induced Roelofs effect caused by the same shift in straight ahead?
, 2002
"... We investigaCC whether theorigina Roelofs e#ectae the induced Roelofs e#ectae cactS by the saS shift in perceived straeiv arae Subjects were presented witha tahSz withina frai in complete dapleteS Taple a fral could both be shifted to the left or right of objectivestrativ arat OnsepaflIC triaflI sub ..."
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Cited by 3 (0 self)
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We investigaCC whether theorigina Roelofs e#ectae the induced Roelofs e#ectae cactS by the saS shift in perceived straeiv arae Subjects were presented witha tahSz withina frai in complete dapleteS Taple a fral could both be shifted to the left or right of objectivestrativ arat OnsepaflIC triaflI subjectsgaj verba estimasS atim the position of either thetaSxH or thefraxP The eccentricity of thefraL wa underestimaPfl (theorigina Roelofs e#ect). However, the perceived position of the taeSx did not follow this misjudgement of the eccentricity of thefraz (the induced Roelofs e#ectwa not present). Thus, it is unlikelytha both e#ectshac a common origin in misjudging egocentricstraent arae # 2002 Elsevier Science Ltd. All rights reserved.
COMPARING THE SENSITIVITY OF MANUAL PURSUIT AND PERCEPTUAL JUDGMENTS TO PICTORIAL DEPTH EFFECTS
- PSYCHOLOGICAL SCIENCE
, 2003
"... We examined whether a pictorial depth illusion influences the manual pursuit of a moving dot to the same extent that it influences the dot's apparent displacement. Fourteen subjects performed two tasks. In one case, they used their unseen hand to track a dot that moved on an elliptical path. In ..."
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Cited by 2 (0 self)
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We examined whether a pictorial depth illusion influences the manual pursuit of a moving dot to the same extent that it influences the dot's apparent displacement. Fourteen subjects performed two tasks. In one case, they used their unseen hand to track a dot that moved on an elliptical path. In the other, they first watched the dot move on the same path, and then set an ellipse to match the shape of the dot's path. The illusion influenced the two tasks to the same extent, suggesting that the visual information processing is the same for the two tasks.
Original Papers Polish Psychological Bulletin
"... Perceptual global processing and hierarchically organized affordances – the lack of interaction between vision-for-perception and vision-for-action. Abstract: In visual information processing, two kinds of vision are distinguished: vision-for-perception related to the conscious identifi cation of ob ..."
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Perceptual global processing and hierarchically organized affordances – the lack of interaction between vision-for-perception and vision-for-action. Abstract: In visual information processing, two kinds of vision are distinguished: vision-for-perception related to the conscious identifi cation of objects, and vision-for-action that deals with visual control of movements. Neuroscience suggests that these two functions are performed by two separate brain neural systems – the ventral and dorsal pathways (Milner and Goodale, 1995). Two experiments using behavioural measures were conducted with the objective of exploring any potential interaction between these two functions of vision. The aim was to combine in one task methods allowing for the simultaneous capture of both perceptual global processing and affordance extraction and to check whether they infi uence each other. This aim was achieved by employing the paradigms of Navon (1977) and Tucker and Ellis (1998). A compound fi gure was created made up of objects with handles that might or might not have orientation congruent between levels. The results revealed that while the affordance effect occurred every time, the Navon effect appeared only when subjects focused their attention on object elements responsible for inconsistence within compound fi gure. Most importantly, even when these two effects occurred at once, they had no effect on each other. Results from the study failed to confi rm the hypothesis about interaction and gives support to the view that vision-for-perception and vision-for-action tend to act as separate systems.
ii Micro-affordances in Visual Mental Imagery and Visual Short-term
, 2002
"... This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without the author's prior consent. ..."
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This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without the author's prior consent.
Different Gestalt processing for different
, 2004
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"... This dissertation investigates free-form modeling tools driven by 3D drawing-style input and their utility for design, illustration, and visualization in science and art. 3D drawing interactions are developed and analyzed with respect to control, artistic expression, and the unique design methodolog ..."
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This dissertation investigates free-form modeling tools driven by 3D drawing-style input and their utility for design, illustration, and visualization in science and art. 3D drawing interactions are developed and analyzed with respect to control, artistic expression, and the unique design methodologies they make possible. A toolset of new interactive algorithms for 3D drawing called Drawing on Air is presented. The additional control provided by Drawing on Air was measured in a quantitative user-study in which it significantly outperformed multiple alternative techniques. Additionally, qualitative evaluations driven by art and scientific illustration lead to successful 3D modeling results of subjects previously too challenging to address effectively with 3D drawing techniques. To better understand this style of 3D computer input, statistical models grounded in theories of human perception and motor control were developed and analyzed with respect to experimentally collected data. Results help to highlight differences between the input techniques tested and lead to the definition of an index of difficulty for controlled, 3D, drawing-style input. Finally, a series of four experiments using 3D drawing tools for design of scientific
PSYCHOLOGICAL SCIENCE Research Article COMPARING THE SENSITIVITY OF MANUAL PURSUIT AND PERCEPTUAL JUDGMENTS TO PICTORIAL DEPTH EFFECTS
"... Abstract—We examined whether a pictorial depth illusion influences the manual pursuit of a moving dot to the same extent that it influences the dot’s apparent displacement. Fourteen subjects performed two tasks. In one case, they used their unseen hand to track a dot that moved on an elliptical path ..."
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Abstract—We examined whether a pictorial depth illusion influences the manual pursuit of a moving dot to the same extent that it influences the dot’s apparent displacement. Fourteen subjects performed two tasks. In one case, they used their unseen hand to track a dot that moved on an elliptical path. In the other, they first watched the dot move on the same path, and then set an ellipse to match the shape of the dot’s path. The illusion influenced the two tasks to the same extent, suggesting that the visual information processing is the same for the two tasks. Exploring whether a visual illusion has the same influence on a motor task as on its perceptual counterpart has become a standard way to test for common information processing for perception and action. Some studies have reported dissociations, with different patterns of results for perceptual-judgment and motor tasks. Such findings have been regarded as support for the separate processing of visual information for perception and action (e.g., Goodale & Milner, 1992; Loomis, Da Silva, Fujita, & Fukusima, 1992). However, visual illusions frequently involve incongruous effects on related visual attributes (Gillam, 1998). The reported dissociations can therefore also be interpreted as indicating that different visual attributes were used to perform the different tasks (Smeets & Brenner, 2001). In support of such an interpretation, it can be noted that similar dissociations are found even when both tasks involve perceptual judgments or both involve actions (Smeets & Brenner, 1995; Vishton, Rea, Cutting, & Nunez, 1999). Thus, whenever actions resist an illusion that distorts perception, it is necessary to check whether the motor response is being driven by the same visual attributes as the perceptual judgment. (See,
