scholarly journals Influence of target size and eccentricity on binocular summation of reaction time in kinetic perimetry

2011 ◽  
Vol 51 (1) ◽  
pp. 174-178 ◽  
Author(s):  
Akemi Wakayama ◽  
Chota Matsumoto ◽  
Kazuyo Ohmure ◽  
Masahiko Inase ◽  
Yoshikazu Shimomura
Keyword(s):  
Reaction Time ◽  
Target Size ◽  
Binocular Summation ◽  
Kinetic Perimetry

Target-Size Influences on Reaction Time with Movement Time Controlled

1980 ◽  
Vol 12 (4) ◽  
pp. 239-261 ◽  
Author(s):  
John T. Quinn ◽  
Richard A. Schmidt ◽  
Howard N. Zelaznik ◽  
Brian Hawkins ◽  
Robin McFarquhar
Keyword(s):  
Reaction Time ◽  
Movement Time ◽  
Target Size

Reaction Time as a Function of Peripheral Retinal Locus around Fovea: Effect of Stimulus Size

1976 ◽  
Vol 43 (2) ◽  
pp. 603-606 ◽  
Author(s):  
Naoyuki Osaka
Keyword(s):  
Reaction Time ◽  
Reaction Times ◽  
Stimulus Size ◽  
Target Size ◽  
Retinal Locus ◽  
Visual Reaction

Using targets of four sizes between 18' and 116' at a fixed luminance of 5.8 cd/m2, human visual reaction times (RT) were measured on a circle at 30° eccentric to the fovea. A foveal and 12 peripheral retinal loci were explored, covering the range between 0° and 330° in steps of 30° units on a circle about the fovea. RT decreased significantly by the stimulation to the quadrant retinal loci between nasal and superior side. RT decreased as a function of increasing target size and the amount of decrement was relatively larger in the periphery than in the fovea.

scholarly journals Reaction time in automated kinetic perimetry: effects of stimulus luminance, eccentricity, and movement direction

2001 ◽  
Vol 41 (16) ◽  
pp. 2157-2164 ◽  
Author(s):  
Ulrich Schiefer ◽  
Hans Strasburger ◽  
Stephan T. Becker ◽  
Reinhard Vonthein ◽  
Jan Schiller ◽  
...  
Keyword(s):  
Reaction Time ◽  
Movement Direction ◽  
Stimulus Luminance ◽  
Kinetic Perimetry

scholarly journals Binocular summation of chromatic changes as measured by visual reaction time

2002 ◽  
Vol 64 (1) ◽  
pp. 140-147 ◽  
Author(s):  
J. R. Jiménez ◽  
J. M. Medina ◽  
L. Jiménez Del Barco ◽  
J. A. Díaz
Keyword(s):  
Reaction Time ◽  
Binocular Summation ◽  
Visual Reaction Time ◽  
Visual Reaction

The Normal Age-Corrected and Reaction Time–Corrected Isopter Derived by Semi-automated Kinetic Perimetry

Ophthalmology ◽  
2007 ◽  
Vol 114 (6) ◽  
pp. 1065-1072.e2 ◽  
Author(s):  
Reinhard Vonthein ◽  
Stephan Rauscher ◽  
Jens Paetzold ◽  
Katarzyna Nowomiejska ◽  
Elke Krapp ◽  
...  
Keyword(s):  
Reaction Time ◽  
Kinetic Perimetry

scholarly journals Reaction time during semi-automated kinetic perimetry (SKP) in patients with advanced visual field loss

2010 ◽  
Vol 88 (1) ◽  
pp. 65-69 ◽  
Author(s):  
Katarzyna Nowomiejska ◽  
Reinhard Vonthein ◽  
Jens Paetzold ◽  
Zbigniew Zagorski ◽  
Randy Kardon ◽  
...  
Keyword(s):  
Reaction Time ◽  
Visual Field ◽  
Visual Field Loss ◽  
Kinetic Perimetry

Step Tracking Shrinking Targets

1987 ◽  
Vol 31 (2) ◽  
pp. 248-252 ◽  
Author(s):  
Walter W. Johnson ◽  
Sandra G. Hart
Keyword(s):  
Reaction Time ◽  
Time Pressure ◽  
Movement Time ◽  
Fixed Time ◽  
The Other ◽  
Simple Function ◽  
Target Size ◽  
Movement Speed ◽  
Subjective Workload ◽  
The Future

Four models describing how people might acquire targets that dynamically vary in size were examined; two that described movement speed as a simple function of target size (either initial or final) and two that described movement speed as a function of the predicted size of the targets at a fixed time in the future (one was referenced to the beginning of the reaction time phase, and the other to the end of this phase). It was found that movement time was best described as a function of a size prediction made at the end, rather than the start, of the reaction time phase. Subjective workload ratings primarily reflected the total amount of time needed to acquire the targets rather than the time pressure imposed by the diminishing size of these targets.

Factors Influencing Reaction Time during Automated Kinetic Perimetry on the Tübingen Computer Campimeter

2005 ◽  
Vol 46 (7) ◽  
pp. 2633 ◽  
Author(s):  
Stephan T. Becker ◽  
Reinhard Vonthein ◽  
Nicholas J. Volpe ◽  
Ulrich Schiefer
Keyword(s):  
Reaction Time ◽  
Kinetic Perimetry ◽  
Factors Influencing

A Comparison of Fractionated Reaction Time between Cerebral Palsied and Nonhandicapped Youths

1989 ◽  
Vol 6 (4) ◽  
pp. 379-388 ◽  
Author(s):  
Susan Parks ◽  
Debra J. Rose ◽  
John M. Dunn
Keyword(s):  
Cerebral Palsy ◽  
Reaction Time ◽  
Execution Time ◽  
Simple Reaction Time ◽  
Motor Program ◽  
Target Size ◽  
Movement Accuracy ◽  
Central Processing ◽  
Aiming Movement ◽  
Programming Time

This research studied the effects of cerebral palsy on the ability to plan and execute a one-handed aiming task. Simple reaction time (SRT) was fractionated into its premotor (PMT) and motor (MOT) components. Subjects were 20 youths, 10 with cerebral palsy and 10 nonhandicapped youths. The effect of accuracy demands on the planning and execution time was also studied by manipulating endpoint target size. Significant differences in PMT but not in MOT were obtained between groups, indicating that spastic hemiplegic cerebral palsied youths require more time to plan a simple aiming movement due to central processing limitations. Although manipulation of endpoint target size did not affect programming time for either group, the time to execute the movement increased significantly. This finding suggests that instead of incorporating the parameter of movement accuracy in the selected motor program, subjects adopted a feedback driven strategy to achieve greater endpoint accuracy.

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