scholarly journals Effects of visual stimulus degradation, S-R compatibility, and foreperiod duration on choice reaction time and movement time

1978 ◽  
Vol 12 (2) ◽  
pp. 106-108 ◽  
Author(s):  
H. W. Frowein ◽  
A. F. Sanders
Keyword(s):  
Reaction Time ◽  
Choice Reaction Time ◽  
Visual Stimulus ◽  
Movement Time ◽  
Foreperiod Duration ◽  
Stimulus Degradation

Movement Amplitude, Pointing Accuracy and Choice-Reaction Time

1976 ◽  
Vol 43 (3) ◽  
pp. 807-812 ◽  
Author(s):  
Andras Semjen ◽  
Jean Requin
Keyword(s):  
Reaction Time ◽  
Linear Relationship ◽  
Choice Reaction Time ◽  
Movement Time ◽  
Movement Amplitude ◽  
Manual Pointing ◽  
Pointing Task ◽  
Pointing Accuracy

Choice reaction time and movement time were measured in a discrete visuo-manual pointing task. Two movement amplitudes (7.5 cm and 30 cm) and two target widths (1.5 cm and 6 cm) were used in all possible combinations. Movement time varied according to movement amplitude and to target width. However, some departure from the linear relationship between movement difficulty and movement time, known as the Fins' law, was observed. Choice RT varied according to movement amplitude, whereas target width influenced choice RT for short-amplitude movements but not for long-amplitude movements. It is concluded that the previously reported relationship between movement difficulty and choice RT primarily results from variations in movement amplitude.

Assessing Midline Crossing Ability in Adults with Spastic Diplegic Cerebral Palsy

2006 ◽  
Vol 23 (4) ◽  
pp. 356-369
Author(s):  
Colleen A. Lewis ◽  
Paul R. Surburg
Keyword(s):  
Cerebral Palsy ◽  
Reaction Time ◽  
Lower Extremity ◽  
Choice Reaction Time ◽  
Movement Time ◽  
Standing Position ◽  
Subsequent Treatment ◽  
Midline Crossing

The purpose of this study was to determine if adults with spastic diplegic cerebral palsy (CP) display midline crossing inhibition (MCI) in the lower extremity as measured by choice reaction time (CRT) and movement time (MT) as compared to participants without disabilities. Midline crossing ability was assessed in the standing position using a protocol developed by Eason and Surburg (1993). Both groups were significantly slower in the contralateral direction as compared to the ipsilateral and midline direction as measured by CRT. Results revealed that adults with CP were significantly slower in CRT and MT tasks as compared to participants without disabilities. Assessment of midline crossing ability may provide useful information related to assessment and subsequent treatment as individuals with CP age.

An Electromyographic Examination of Response Execution and Inhibition in Between-Hand Choice Reaction Time

2005 ◽  
Vol 19 (4) ◽  
pp. 330-336 ◽  
Author(s):  
Christophe Tandonnet ◽  
Christophe Tandonnet ◽  
Borís Burle ◽  
Franck Vidal ◽  
Thierry Hasbroucq
Keyword(s):  
Reaction Time ◽  
Choice Reaction Time ◽  
Motor Command ◽  
Emg Activity ◽  
Alternative Response ◽  
Foreperiod Duration ◽  
First Dorsal Interosseus ◽  
Response Execution ◽  
Central Level

Abstract: In between-hand choice reaction time (RT) tasks, the activation of the cerebral motor structures involved in the required response is accompanied by an inhibition of the structures involved in the alternative response. The objectives were (1) to check whether the inhibition observed at the central level can be accompanied by signs of deactivation at the peripheral level during response execution and (2) to assess whether time preparation affects response execution. Surface electromyographic (EMG) activity of the first dorsal interosseus was recorded during the performance of a between-hand choice visual RT task in which the foreperiod duration was manipulated. The contraction of the muscle involved in the required response was accompanied by a reduction in the EMG activity of the muscle involved in the nonrequired response. The foreperiod duration influenced this EMG pattern. The findings reveal peripheral signs of a deactivation of the non-required response and suggest that time preparation influences the activity of the muscles involved in both the required and the nonrequired response. The present results are compatible with the view that, at least in between-hand choice RT tasks, the motor command specifies both the activation of the central structures involved in the required response and the inhibition of the central structures involved in the nonrequired response. They further indicate that time preparation affects the activity of the response agonists.

Optimization of Foot Pedal Placement in Commercial School Buses

1980 ◽  
Vol 24 (1) ◽  
pp. 634-637
Author(s):  
Donna J. Sexton ◽  
Rodger J. Koppa
Keyword(s):  
Reaction Time ◽  
Public School ◽  
Human Factors ◽  
Choice Reaction Time ◽  
Movement Time ◽  
Vertical Separation ◽  
School Buses ◽  
Operator Performance ◽  
Simple Movement ◽  
Female Subjects

On the basis of results obtained in recent studies of foot pedal placement as well as specifications found in human factors guidelines, four different foot pedal configurations were tested for suitability in public school buses. Both simple movement time and choice reaction time measures were taken for ten female subjects on three coplanar arrangements and one configuration with a vertical separation between the accelerator and brake pedals. Results indicate significantly faster brake movement times for all three coplanar arrangements than for the arrangement with a vertical separation between the two pedals. With respect to the coplanar arrangements, brake movement time was significantly faster for the two arrangements with a horizontal separation of 12.0 cm rather than the arrangement with only 8.0 cm of separation. Therefore, it is concluded that operator performance may be significantly improved by providing a coplanar pedal arrangement with approximately 12.0 cm of horizontal separation.

Repeated Measures on a Choice Reaction Time Task

1982 ◽  
Vol 26 (4) ◽  
pp. 359-363 ◽  
Author(s):  
Michele Krause
Keyword(s):  
Reaction Time ◽  
Data Collection ◽  
Choice Reaction Time ◽  
Repeated Measures ◽  
Movement Time ◽  
Reaction Time Task ◽  
Learning Effects ◽  
Current Investigation ◽  
Enlisted Men ◽  
Practice Trials

The current investigation examined a visual choice reaction time (CRT) task to determine its suitability for repeated measures experimentation. Fifteen Navy enlisted men served as subjects for one-, two-, and four-choice reaction time conditions. Fifty trials on each condition were administered for 15 consecutive workdays. Reaction time (RT), movement time (MT), and total time (TT) were recorded for each trial. Results indicated that across all RT conditions, intersession correlations were differentially stable by about Day 8, with reliabilities around .71. Means remained unchanged over the stable days and variances remained constant across all 15 days of the experiment for the RT measure. It was concluded that studies using RT as the dependent variable should allow for sufficient RT practice prior to data collection to ensure that the results are not contaminated by learning effects. It is recommended that at least 1000 practice trials be given prior to using an RT task to assess the effects of an environment.

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