scholarly journals Robot active touch exploration: constraints and strategies

2002 ◽  
Author(s):  
K.S. Roberts
Keyword(s):  
Active Touch

Organisation of Sensorimotor Integration during Active Touch: an fMRI study

NeuroImage ◽  
2009 ◽  
Vol 47 ◽  
pp. S131
Author(s):  
F. Kurth ◽  
K. Zilles ◽  
L.E. Wang ◽  
M. Dafotakis ◽  
K. Amunts ◽  
...  
Keyword(s):  
Sensorimotor Integration ◽  
Active Touch ◽  
Fmri Study

scholarly journals Investigating key functions of hand movements by individuals with visual impairment: Improving teaching practices in special education through research

2016 ◽  
Vol 6 (1) ◽  
pp. 02 ◽  
Author(s):  
Vassilios Sotirios Argyropoulos ◽  
Sofia Chamonikolaou
Keyword(s):  
Visual Impairment ◽  
Teaching Practices ◽  
Active Touch ◽  
Hand Movements ◽  
Second Phase ◽  
Geometric Shapes ◽  
Think Aloud Protocols ◽  
Global Properties ◽  
Exploratory Movement ◽  
Active Exploration

AbstractResearch is still ongoing with regard to types of exploratory movement by active touch and its key functions in individuals with visual impairment. The aim of the present study was to describe and identify different types of exploratory movement performed by individuals with visual impairment in their exploration of geometric shapes. A total of twelve participants were asked to explore a number of simple and complex geometric shapes. The research design consisted of two research phases. In the first phase, the participants were asked to describe and, if possible, to identify the properties of each shape. In the second phase, the participants were asked to describe their hand movements during active exploration. The findings indicated that the participants utilized different movements to extract the featural and global properties of the shapes. It was also observed that some patterns of exploratory movement were present in all of the participants’ strategies, which indicated issues of laterality. Finally, the research highlighted that by observing patterns of exploratory movement, educators of students with visual impairment can determine which strategies may be worth exploring with a view to their adoption in teaching practices and instruction. Keywords: visual impairment, active touch, geometric shapes, think -aloud protocols, laterality, teaching practices

scholarly journals Edge orientation perception during active touch

2018 ◽  
Vol 120 (5) ◽  
pp. 2423-2429 ◽  
Author(s):  
Derek Olczak ◽  
Vaishnavi Sukumar ◽  
J. Andrew Pruszynski
Keyword(s):  
Motor System ◽  
Active Touch ◽  
Contact Forces ◽  
Edge Orientation ◽  
Passive Touch ◽  
Per Se ◽  
Orientation Perception ◽  
Psychophysical Studies ◽  
Psychophysical Task ◽  
Better Than

Previous studies investigating the perceptual attributes of tactile edge orientation processing have applied their stimuli to an immobilized fingertip. Here we tested the perceptual attributes of edge orientation processing when participants actively touched the stimulus. Our participants moved their finger over two pairs of edges, one pair parallel and the other nonparallel to varying degrees, and were asked to identify which of the two pairs was nonparallel. In addition to the psychophysical estimates of edge orientation acuity, we measured the speed at which participants moved their finger and the forces they exerted when moving their finger over the stimulus. We report four main findings. First, edge orientation acuity during active touch averaged 12.4°, similar to that previously reported during passive touch. Second, on average, participants moved their finger over the stimuli at ~20 mm/s and exerted contact forces of ~0.3 N. Third, there was no clear relationship between how people moved their finger or how they pressed on the stimulus and their edge orientation acuity. Fourth, consistent with previous work testing tactile spatial acuity, we found a significant correlation between fingertip size and orientation acuity such that people with smaller fingertips tended to have better orientation acuity. NEW & NOTEWORTHY Edge orientation acuity expressed by the motor system during manipulation is many times better than edge orientation acuity assessed in psychophysical studies where stimuli are applied to a passive fingertip. Here we show that this advantage is not because of movement per se because edge orientation acuity assessed in a psychophysical task, where participants actively move their finger over the stimuli, yields results similar to previous passive psychophysical studies.

Experimental Studio 2019. Drawing – a Tactile Approaches

2020 ◽  
Vol 4 (1) ◽  
Author(s):  
Atanas Totlyakov ◽  
◽  
◽  
Keyword(s):  
Creative Process ◽  
Practical Experience ◽  
Active Touch ◽  
The Body ◽  
Working Environment ◽  
Interpersonal Interaction ◽  
Mental Images ◽  
Visual Contact ◽  
Sensory Field ◽  
Current Article

The current article are discussed the problem of significant importance of the tactile feelings in the context of the ways in which they are used in drawing creation.The basis of the study is the theoretical and practical experience gained in the conditions of creative experimentation, derived as a specific artistic practice.The relationship between visual and mental images and their comparison with the sensory field of the active touch is analyzed.There are summarized a four experimental plans: Mastering practical tactil experience and its creativity interpretation; Comparison of the tactil execution of a creative act and optical perception of drawings obtained without visual contact; Reflection of a participation of the body in the creative process; Focusing attention on feeling and their emotional coloring as interpersonal interaction in the frame of the working environment.

Discriminable Height Differences of Raised Lines

2020 ◽  
Vol 114 (3) ◽  
pp. 198-211
Author(s):  
Wataru Toyoda ◽  
Ryo Miyamoto ◽  
Susumu Oouchi ◽  
Takenobu Inoue
Keyword(s):  
Older Persons ◽  
Visual Impairments ◽  
Active Touch ◽  
Psychophysical Experiment ◽  
Paired Stimuli ◽  
Main Effect ◽  
Participant Group ◽  
The Mean ◽  
Height Data

Introduction: The purpose of this study was to determine the discriminable height differences of raised lines printed on paper, as assessed by people who are blind, with or without years of tactile experience. Methods: Ten younger and 10 older tactile readers with blindness and with rich tactile experience; and 10 blindfolded, older, sighted participants with little tactile experience discriminated paired raised-line stimuli of different heights using the fingers of their preferred hand by active touch in a psychophysical experiment. Results: There was a significant main effect of the height of the stimulus, F(2, 54) = 56.446, MS = .060, p < .001, [Formula: see text] = .676, [Formula: see text] = .341, and participant group, F(2, 27) = 13.717, MS = .064, p < .001, [Formula: see text] = .504, [Formula: see text] = .357; however, there was no significant main effect of the width of the lines, or any interactions. The younger and older tactile readers had virtually similar thresholds and Weber fractions, and they could discriminate paired stimuli more accurately and efficiently than the older, sighted participants. We provided the discriminable height data of the raised lines based on the mean and 95th percentile values of the Weber fractions. Discussion: The results indicate the importance of tactile experiences for height discrimination in active touch. For older persons with recently developed blindness, raised lines with larger height differences should be used. Information for practitioners: These data will be helpful for developing new braille embossers that can print raised-line graphics for people with visual impairments, with or without years of tactile experience.

scholarly journals Synaptic Mechanisms Underlying Sparse Coding of Active Touch

Neuron ◽  
2011 ◽  
Vol 70 (1) ◽  
pp. 170
Author(s):  
Sylvain Crochet ◽  
James F.A. Poulet ◽  
Yves Kremer ◽  
Carl C.H. Petersen
Keyword(s):  
Sparse Coding ◽  
Active Touch ◽  
Synaptic Mechanisms
Sign in / Sign up

Export Citation Format

Share Document