Field Test of Arousal: A Portable Reaction Timer with Data Storage

1982 ◽  
Vol 24 (4) ◽  
pp. 487-493 ◽  
Author(s):  
R. T. Wilkinson ◽  
D. Houghton
Keyword(s):  
Reaction Time ◽  
Data Storage ◽  
Field Test ◽  
Visual Stimulus ◽  
Simple Reaction Time ◽  
Cassette Tape ◽  
Simple Reaction ◽  
Cassette Recorder ◽  
The Subject ◽  
Related Stress

A portable, unprepared simple reaction time (USRT) test is described. This test is particularly suitable for assessing performance in the field as a function of arousal-related stress. The test, which is housed in a small, battery-powered cassette recorder, presents a visual stimulus at quasi-random intertrial intervals ranging from 1 to 10 s. The subject responds by pressing a button as quickly as possible, whereupon the reaction time is displayed. The duration of the test is limited only by the cassette tape on which the data are recorded, but 10 min is recommended. Reviewed are studies illustrating the test's brief practice curve and its sensitivity to arousal-related stress.

Temporal-Order Judgment and Reaction Time to Stimuli of Different Rise Times

Perception ◽  
1993 ◽  
Vol 22 (8) ◽  
pp. 963-970 ◽  
Author(s):  
Piotr Jaśkowski
Keyword(s):  
Reaction Time ◽  
Simple Reaction Time ◽  
Temporal Order ◽  
Temporal Order Judgment ◽  
Stimulus Presentation ◽  
Stimulus Onset ◽  
Simple Reaction ◽  
Point Of Subjective Simultaneity ◽  
Subjective Simultaneity ◽  
The Subject

Point of subjective simultaneity and simple reaction time were compared for stimuli with different rise times. It was found that these measures behave differently. To explain the result it is suggested that in the case of temporal-order judgment the subject takes into account not only the stimulus onset but also other events connected with stimulus presentation.

Effects of Changes in the Intensity of White Noise on Simultaneity Judgements and Simple Reaction Time

1971 ◽  
Vol 23 (3) ◽  
pp. 296-303 ◽  
Author(s):  
A. J. Sanford
Keyword(s):  
Reaction Time ◽  
White Noise ◽  
Simple Reaction Time ◽  
Random Noise ◽  
Difference Threshold ◽  
Response Initiation ◽  
Simple Reaction ◽  
Informal Observation ◽  
The Subject ◽  
The Difference

On the basis of earlier work and informal observation it was suspected that the effect of loudness on simple reaction time (RT) could not be accounted for by changes in the time it takes the subject to hear the stimulus. Two experiments are described in which an increment in the level of background random noise is presented to the subject. The effect of increment size on RT and on a simultaneity judgement are investigated using a range of increments from just above difference threshold to moderately loud and clear. The difference in the size of loudness effects in the two tasks lends some support to a model which explains the influence of loudness on RT largely in terms of latency of response initiation.

Hospitalization and Simple Reaction Time

1965 ◽  
Vol 20 (1) ◽  
pp. 175-180 ◽  
Author(s):  
Robert J. Resnick
Keyword(s):  
Reaction Time ◽  
Visual Stimulus ◽  
Differential Effect ◽  
Simple Reaction Time ◽  
Hospitalized Patients ◽  
Auditory Stimuli ◽  
Time Study ◽  
Simple Reaction ◽  
Reaction Time Study

Previous studies have raised the question of the validity of using only hospitalized Ss as controls when the results are generalized to a non-hospitalized population. Twelve male hospitalized Ss and 12 male non-hospitalized Ss participated in a reaction time study using the visual and auditory modalities under constant 6-, 9-, and 15-sec. foreperiod conditions. The data showed significant differences between groups in all foreperiods with the auditory stimuli and the 15-sec. foreperiod with the visual stimulus. Results are discussed in terms of the use of hospitalized patients as controls in research and the differential effect of foreperiod and modality on the two groups studied.

Do Difficulties in Stimulus Discrimination Affect Luminance Processing?

Perception ◽  
1996 ◽  
Vol 25 (1_suppl) ◽  
pp. 124-124
Author(s):  
D Pins ◽  
M Treisman ◽  
R Johnston
Keyword(s):  
Reaction Time ◽  
Choice Reaction Time ◽  
Simple Reaction Time ◽  
Discrimination Task ◽  
Hyperbolic Function ◽  
Specific Time ◽  
Stimulus Discrimination ◽  
Simple Reaction ◽  
The Subject ◽  
Time Required

Simple reaction time is known to decay as a hyperbolic function of luminance (Piéron's function). An identical relationship has also been demonstrated recently (Pins and Bonnet, 1996 Perception & Psychophysics in press) with different choice-reaction-time tasks. Although mean choice reaction time increased with the complexity of the task, the exponents of the functions relating reaction time (RT) to luminance were found to be equal in each experiment. These results suggest that the task specific time required by the different tasks only adds to the time necessary for luminance processing. In these experiments, the different stimuli presented were easily discriminable. In the present study, we examined the effect of variation in luminance on a more difficult discrimination task involving variation in orientation. Five different luminance levels covering the entire mesopic range were used. In two conditions, tilted lines at nine different angles were used, at a spacing of 2°. In the first condition, the orientations were chosen on both sides of the vertical (the subject responded “left” or “right”); in the second condition, the orientations were on both sides of a line oriented at −40° to the vertical (the subject responded “high” or “low”). The results were compared to those of a second experiment in which only two easily discriminable orientations were used. The results show that RT is greater in the experiments in which nine orientations are used, while the effect of intensity on RT is lower. This effect does not depend on orientation.

Relation between Reaction Time and the Phase of Spontaneous and Controlled Breathing Patterns

1995 ◽  
Vol 81 (2) ◽  
pp. 507-513
Author(s):  
Noriko Kobashi ◽  
Yoshio Sugiyama
Keyword(s):  
Reaction Time ◽  
Phase Analysis ◽  
Visual Stimulus ◽  
Simple Reaction Time ◽  
Single Subject ◽  
Breathing Patterns ◽  
Simple Reaction ◽  
Controlled Breathing ◽  
Simple Rt

In this study simple reaction time (simple RT) to a visual stimulus of a single subject was measured during spontaneous and controlled breathing, in which the duration of expiration was prolonged (Asian technique). The phases of breathing were classified as the pause between expiration and inspiration, the inspiration phase, the transition from inspiration to expiration, and the expiration phase. Analysis of data from about 6000 trials indicated that RT to the stimulus was shortest during the transition from inspiration to expiration in controlled breathing.

Effects of intensity and positional predictability of a visual stimulus on simple reaction time

2011 ◽  
Vol 487 (3) ◽  
pp. 345-349 ◽  
Author(s):  
Luiz Renato Rodrigues Carreiro ◽  
Hamilton Haddad ◽  
Marcus Vinicius Chrysóstomo Baldo
Keyword(s):  
Reaction Time ◽  
Visual Stimulus ◽  
Simple Reaction Time ◽  
Simple Reaction

scholarly journals Manipulations of the Response-Stimulus Intervals as a Factor Inducing Controlled Amount of Reaction Time Intra-Individual Variability

2021 ◽  
Vol 11 (5) ◽  
pp. 669
Author(s):  
Paweł Krukow ◽  
Małgorzata Plechawska-Wójcik ◽  
Arkadiusz Podkowiński
Keyword(s):  
Reaction Time ◽  
Simple Reaction Time ◽  
Reaction Times ◽  
Reaction Time Task ◽  
Assessment Method ◽  
Individual Variability ◽  
Simple Reaction Time Task ◽  
Stimulus Interval ◽  
Simple Reaction ◽  
Response Stimulus

Aggrandized fluctuations in the series of reaction times (RTs) are a very sensitive marker of neurocognitive disorders present in neuropsychiatric populations, pathological ageing and in patients with acquired brain injury. Even though it was documented that processing inconsistency founds a background of higher-order cognitive functions disturbances, there is a vast heterogeneity regarding types of task used to compute RT-related variability, which impedes determining the relationship between elementary and more complex cognitive processes. Considering the above, our goal was to develop a relatively new assessment method based on a simple reaction time paradigm, conducive to eliciting a controlled range of intra-individual variability. It was hypothesized that performance variability might be induced by manipulation of response-stimulus interval’s length and regularity. In order to verify this hypothesis, a group of 107 healthy students was tested using a series of digitalized tasks and their results were analyzed using parametric and ex-Gaussian statistics of RTs distributional markers. In general, these analyses proved that intra-individual variability might be evoked by a given type of response-stimulus interval manipulation even when it is applied to the simple reaction time task. Collected outcomes were discussed with reference to neuroscientific concepts of attentional resources and functional neural networks.

Timing of expectancy peak in simple reaction time situation

1974 ◽  
Vol 38 (6) ◽  
pp. 461-470 ◽  
Author(s):  
R. Näätänen ◽  
V. Muranen ◽  
A. Merisalo
Keyword(s):  
Reaction Time ◽  
Simple Reaction Time ◽  
Simple Reaction
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