scholarly journals Now You Feel It, Now You Don’t: The Effect of Movement, Cue Complexity, and Body Location on Tactile Change Detection

2019 ◽  
Vol 62 (4) ◽  
pp. 643-655
Author(s):  
Kylie Gomes ◽  
Scott Betza ◽  
Sara Lu Riggs
Keyword(s):  
Change Detection ◽  
Design Guidelines ◽  
Tactile Perception ◽  
The Body ◽  
Tactile Display ◽  
High Complexity ◽  
Detection Rates ◽  
Tactile Displays ◽  
Address Data ◽  
Tactile Cues

Objective To evaluate the effects that movement, cue complexity, and the location of tactile displays on the body have on tactile change detection. Background Tactile displays have been demonstrated as a means to address data overload by offloading the visual and auditory modalities. However, change blindness—the failure to detect changes in a stimulus when changes coincide with another event or disruption in stimulus continuity—has been demonstrated to affect the tactile modality and may be exacerbated during movement. The complexity of tactile cues and locations of tactile displays on the body may also affect the detection of changes in tactile patterns. Limitations to tactile perception need to be examined. Method Twenty-four participants performed a tactile change detection task while sitting, standing, and walking. Tactile cues varied in complexity and included low, medium, and high complexity cues presented to the arm or back. Results Movement adversely affects tactile change detection as hit rates were the highest while sitting, followed by standing and walking. Cue complexity affected tactile change detection: Low complexity cues resulted in higher detection rates compared with medium and high complexity cues. The arms exhibited better change detection performance than the back. Conclusion The design of tactile displays should consider the effect of movement. Cue complexity should be minimized and decisions about the location of a tactile display should take into account body movements to support tactile perception. Application The findings can provide design guidelines to inform tactile display design for data-rich, complex domains.

The Effect of Movement and Cue Complexity on Tactile Change Detection

2017 ◽  
Vol 61 (1) ◽  
pp. 1541-1545 ◽  
Author(s):  
Scott M. Betza ◽  
Scott T. Reeves ◽  
James H. Abernathy ◽  
Sara Lu Riggs
Keyword(s):  
Change Detection ◽  
Knowledge Base ◽  
Change Blindness ◽  
Low Complexity ◽  
Tactile Perception ◽  
High Complexity ◽  
Visual Channel ◽  
Detection Rates ◽  
Tactile Displays ◽  
Tactile Modality

There is a growing interest in using touch to offload the often overburdened visual channel as its merit has been demonstrated in various work domains. However, more work is needed to understand the perceptual limitations of the tactile modality, including how it is affected by change blindness (i.e., failure to detect changes due to transients) as the majority of work on change blindness has been in vision. This study examines how movement and cue complexity affects the ability to detect tactile changes. The findings indicate the ability to detect changes are affected by: 1) movement (walking resulted in worse change detection rates compared to sitting) and 2) cue complexity (high complexity cues had worse change detection rates compared to low complexity). Overall, this work adds to the knowledge base of tactile perception and can inform the design of tactile displays for multiple work domains such as anesthesiology.

Tactile Display of Vibratory Information in Teleoperation and Virtual Environments

1995 ◽  
Vol 4 (4) ◽  
pp. 387-402 ◽  
Author(s):  
Dimitrios A. Kontarinis ◽  
Robert D. Howe
Keyword(s):  
Virtual Environments ◽  
Reaction Times ◽  
Open Loop ◽  
Design Guidelines ◽  
Tactile Feedback ◽  
Tactile Display ◽  
Tactile Displays ◽  
Fundamental Goal ◽  
Vibration Sensing ◽  
Mechanical Models

This paper investigates the use of tactile displays for conveying task-related vibrations in teleoperation and virtual environments. Vibration displays can be implemented with inexpensive, open loop devices that can be added to many existing systems to improve performance. We describe the design of our prototype vibration sensing and display system, and experimentally demonstrate the utility of this type of tactile feedback. We also delineate the kinds of tasks where high-frequency vibratory feedback is important. In inspection and exploration tasks the detection of vibrations can be the fundamental goal of the task, while in some manipulation tasks vibrations can enhance performance by reducing reaction times or permitting minimization of ferees. Design guidelines for implementation of vibration displays, based on simple mechanical models, are also presented.

Tactile Displays

1995 ◽  
Author(s):  
Kurt A. Kaczmarek ◽  
Paul Bach-Y-Rita
Keyword(s):  
Spatial Information ◽  
Temporal Integration ◽  
Temporal Coding ◽  
The Body ◽  
Tactile Display ◽  
Topological Transformation ◽  
Temperature Changes ◽  
Tactile Displays ◽  
Spatial Dimensions ◽  
To Receive

The average adult has approximately 2m2 of skin (Gibson, 1968), about 90% hairy, and remainder smooth or glabrous. Although the glabrous areas are more sensitive than the hairy, both types are highly innervated with sensory receptors and nerves (Sinclair, 1981). Tactile displays have utilized both glabrous and hairy skin, the type selected being relative to the sensory display needs of the various investigators. There are several advantages for selecting the skin as the sensory surface to receive information. (1) It is accessible, extensive in area, richly innervated, and capable of precise discrimination. Further, when the skin of the forehead or trunk is used, the tactile display system does not interfere materially with motor or other sensory functions. (2) The skin shows a number of functional similarities to the retina of the eye in its capacity to mediate information. Large parts of the body surface are relatively flat, and the receptor surfaces of the skin, like the retina, are capable of mediating displays in two spatial dimensions as well as having the potential for temporal integration (summation over time). Thus, there is generally no need for complex topological transformation or for temporal coding of pictorial information for direct presentation onto the accessible areas of the skin, although temporal display factors have been explored with the goal of transmitting spatial information across the skin more quickly than is possible with present systems (Kaczmarek et al., 1984; Bach-y-Rita and Hughes, 1985; Kaczmarek et al., 1985; Loomis and Lederman, 1986). Spatial patterns learned visually can be identified factually, and vice versa (Epstein et al., 1989; Hughes et al., 1990). (3) Certain types of sensory inhibition, including the Mach band phenomenon and other examples of lateral inhibition originally demonstrated for vision, are equally demonstrable in the skin (Bekesy, 1967). (4) Finally, there is evidence that the skin normally functions as an exteroceptor at least in a limited sense: Katz noted that to some extent both vibration and temperature changes can be felt at a distance (Krueger, 1970). For example, a blind person can “feel” the approach of a warm cylinder at three times the distance required by the sighted individual (Krueger, 1970).

Tri-Modal Tactile Display and Its Application Into Tactile Perception of Visualized Surfaces

2020 ◽  
Vol 13 (4) ◽  
pp. 733-744 ◽  
Author(s):  
Guohong Liu ◽  
Chen Zhang ◽  
Xiaoying Sun
Keyword(s):  
Tactile Perception ◽  
Tactile Display

scholarly journals Aflatoxins in body fluids and food of Nigeria children with protein-energy malnutrition

2012 ◽  
Vol 12 (53) ◽  
pp. 6553-6566
Author(s):  
GC Onyemelukwe ◽  
◽  
D Ogoina ◽  
GE Ibiam ◽  
GH Ogbadu
Keyword(s):  
Protein Energy Malnutrition ◽  
Cross Sectional Study ◽  
Body Fluids ◽  
The Body ◽  
Healthy Controls ◽  
Cross Sectional ◽  
Detection Rates ◽  
Nigerian Children ◽  
Protein Energy ◽  
Patient Groups

Aflatoxins are natural contaminants of food crops implicated in the pathogenesis of various human diseases. This study aimed to determine the associations between aflatoxins and protein- energy malnutrition ( PEM) by measurements of aflatoxins in serum, urine and food on plate of Nigerian children with PEM. A cross - sectional study was undertaken in 3 agro - ecological regions of Nigeria (Guinea savannah, Sudan savannah and Rain forest), where aflatoxins B1 , B2, G1, G2, M1, and M2 were measured in sera, urine and food on plate of 79 children with PEM (kwashiorkor n=36, marasmic kwashiorkor n=29 and marasmus n=13) and 33 healthy controls, matched for age and sex. Among healthy controls, aflatoxin detection rates were higher in the Guinea Savannah (72.2%) than in the Sudan Savannah (53.8%), albeit statistically insignificant. In relation to nutritional groups, the rates of detection of aflatoxins were higher in marasmic kwashiorkor (93.1%) and kwashiorkor patients (88.9%) , compared to marasmus (76.9%) and controls (63.6%, p=0.013). The rates of detection of B1 aflatoxin followed a similar trend viz. marasmic kwashiorkor (82.4%), kwashiorkor (69.4%), marasmus (53.8%) and controls (42.4%, p=0.007). Of all types of aflatoxins detected in serum, M2 had the highest rates of detection in all patient groups and controls. The median concentrations of aflatoxins detected in sera of each PEM group were significantly higher than those of controls, but comparisons between PEM groups were not statistically significant. The frequency and concentration of aflatoxins detected in urine and food of PEM groups and controls were not statistically different. However, controls had the lowest serum / urine aflatoxin ratio as well as lowest median aflatoxins concentrations in their food as compared to PEM patient s. In conclusion, aflatoxins are commonly detected in the body fluids and food of Nigerian children , but more frequently and at higher concentrations in children with PEM , possibly due to decreased excretion or increased exposure. Future prospective studies are desirable to determine if aflatoxins contribute to the pathogenesis of all types of PEM and not necessarily kwashiorkor alone.

Tactile Display for a Surface Texture Sensation

1997 ◽  
Author(s):  
Yasushi Ikei ◽  
Shuichi Fukuda
Keyword(s):  
Surface Texture ◽  
Research Work ◽  
Tactile Display ◽  
Just Noticeable Difference ◽  
Intensity Change ◽  
Future Research ◽  
Texture Element ◽  
Low Frequencies ◽  
Tactile Displays ◽  
Real Objects

Abstract The authors have developed tactile displays which have vibrating pins to convey the surface texture sensation of object surfaces to the user’s fingertip. The tactile sensation intensity scaling was performed to obtain a sensation scale of the display by means of the JND (just noticeable difference) method. One dimensional curves on the scale were displayed to investigate the human sensitivity to an intensity change rate. A tactile texture presentation method based on the image of an object surface is introduced. Two kinds of experiment were performed to discuss the feature of the method. Texture discrimination is the first one, in which the effect of texture element size to the correct separation was discussed. Then the sensations produced by the display and those by real objects were compared regarding several samples that had a major feature of vertical lines and of not containing low frequencies. The results are summarized, which is followed by the future research work.

scholarly journals STUDY ON TACTILE PERCEPTION OF SHAPE FOR EFFECTIVE TACTILE DISPLAY

2005 ◽  
Vol 38 (1) ◽  
pp. 260-265
Author(s):  
Myoung-Jong Yoon ◽  
Kee-Ho Yu ◽  
Tae-Kyu Kwon ◽  
Nam-Gyun Kim
Keyword(s):  
Tactile Perception ◽  
Tactile Display

Lost in the move? Secondary task performance impairs tactile change detection on the body

2010 ◽  
Vol 19 (1) ◽  
pp. 215-229 ◽  
Author(s):  
Alberto Gallace ◽  
Sophia Zeeden ◽  
Brigitte Röder ◽  
Charles Spence
Keyword(s):  
Change Detection ◽  
Task Performance ◽  
Secondary Task ◽  
The Body

Patterns of Perceptual-Motor Dysfunction in Children: A Factor Analytic Study

1965 ◽  
Vol 20 (2) ◽  
pp. 335-368 ◽  
Author(s):  
A. Jean Ayres
Keyword(s):  
Motor Planning ◽  
Tactile Perception ◽  
The Body ◽  
Motor Dysfunction ◽  
Defensive Responses ◽  
Tactile Defensiveness ◽  
Factor Analytic Study ◽  
Tactile Stimuli ◽  
Developmental Apraxia ◽  
Two Sides

Analysis of test scores made by 100 children with and 50 without suspected perceptual deficits lead to hypothesizing five syndromes characteristic of dysfunction: (a) developmental apraxia, distinguished by deficits in motor planning, tactile perception and finger identification; (b) tactile, kinesthetic and visual perceptual dysfunction in form and position in space; (c) tactile defensiveness, demonstrated by hyperactive-distractible behavior, faulty tactile perception and defensive responses to tactile stimuli; (d) deficit of integration of the two sides of the body, identified by difficulty in right-left discrimination, avoidance in crossing the mid-line, and incoordinate bilateral hand movements; (e) deficit of visual figure-ground discrimination.

Modulation of neglect hemianesthesia by transcutaneous electrical stimulation

1996 ◽  
Vol 2 (5) ◽  
pp. 452-459 ◽  
Author(s):  
Giuseppe Vallar ◽  
Maria Luisa Rusconi ◽  
Bruno Bernardini
Keyword(s):  
Electrical Stimulation ◽  
Right Hemisphere ◽  
Internal Representation ◽  
Tactile Perception ◽  
The Body ◽  
Transcutaneous Electrical Stimulation ◽  
Neural Basis ◽  
Left Brain ◽  
Right Brain ◽  
Stimulation Of

AbstractThe effects of transcutaneous electrical stimulation on deficits of tactile perception contralateral to a hemispheric lesion were investigated in 10 right brain-damaged patients and in four left brain-damaged patients. The somatosensory deficit recovered, transiently and in part, after stimulation of the side of the neck contralateral to the side of the lesion, in all 10 patients with lesions in the right hemisphere, both with (six cases) and without (four cases) left visuo-spatial hemineglect, and in one left brain-damaged patient with right hemineglect. In three left brain-damaged patients without hemineglect, the treatment had no detectable effects. In one right brain-damaged patient, the stimulation of the side of the neck ipsilateral to the side of the lesion temporarily worsened the somatosensory deficit. These effects of transcutaneous electrical stimulation are similar to those of vestibular stimulation. The suggestion is made that these treatments modulate, through afferent sensory pathways, higher-order spatial representations of the body, which are pathologically distorted toward the side of the lesion. The modulatory effect is direction-specific: the defective internal representation of the contralesional side may be either partly restored, improving the disorder of tactile perception, or further impoverished, worsening the deficit. The possible neural basis of this modulation is discussed. (JINS, 1996, 2, 452–459.)

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