Constant vs Variable Stimulus Intensity and Visual Simple Reaction Time

1981 ◽  
Vol 53 (2) ◽  
pp. 615-619 ◽  
Author(s):  
Pekka Niemi
Keyword(s):  
Reaction Time ◽  
Stimulus Intensity ◽  
Simple Reaction Time ◽  
Preceding Trial ◽  
Variable Stimulus ◽  
Variable Intensity ◽  
Simple Reaction ◽  
Simple Rt ◽  
Effective Intensity

The effects of constant and variable stimulus intensity on simple RT were investigated with an effective intensity manipulation. Luminances were 40 and 90 dB re 10−10 lambert. RT was generally longer when intensity varied within a session than when it was constant. RT also was longer when a bright stimulus was presented on the preceding trial as opposed to a weak one. These effects were not found in earlier studies in which differences in luminance were small. However, the RT-difference between bright and dim stimuli was equal under the conditions of constant and variable intensity. Hence the present results replicate only in part the auditory findings of Grice and Hunter (1964) and Thrane (1961).

Effects of a Timing Signal on Simple Reaction Time with a Rectangular Distribution of Foreperiods

1973 ◽  
Vol 25 (3) ◽  
pp. 344-353 ◽  
Author(s):  
Jean Requin ◽  
Marilyn Granjon ◽  
Henri Durup ◽  
Guy Reynard
Keyword(s):  
Reaction Time ◽  
Simple Reaction Time ◽  
Time Course ◽  
Estimation Error ◽  
Time Estimation ◽  
Main Hypothesis ◽  
Frequency Distributions ◽  
Simple Reaction ◽  
Rectangular Distribution ◽  
Simple Rt

It was hypothesized that the time course of preparation during a variable interstimulus interval (ISI) of a simple reaction time (RT) experiment was partly determined by the subjective distribution of conditional probabilities of the executive signal (ES). Sixty subjects performed a simple auditory RT task with various ranges of six ISI durations organized in rectangular frequency distributions. In order to give the subjects information about elapsed time during ISI, a recurring time-marking click, the periodicity of which was varied, was introduced during the ISI in one of the three series of trials each subject performed. A strong decreasing RT–-ISI relationship was observed supporting the main hypothesis. However, a clear increase of mean RT over all ISIs combined, was also found. Because these two mixed effects were greatest when the click intervened at the possible times of ES occurrence only, three functions of time-information given by the click are discussed: (a) a reduction of the usual increase of time estimation error with increased ISI; (b) an increase of the subjects knowledge of the ISI range resulting from the discontinuity of the time-marking click which makes easier a discrete time-intervals numbering process; (c) a change of the simple-RT task into a discrimination task.

Response Time as a Function of Uncertainty

1978 ◽  
Vol 46 (1) ◽  
pp. 145-146
Author(s):  
Robert C. Newhouse ◽  
Braynard H. Werner
Keyword(s):  
Reaction Time ◽  
Response Time ◽  
Simple Reaction Time ◽  
Sign Test ◽  
Simple Reaction ◽  
Simple Rt

The purpose of this study was to compare uncertainty among simple reaction time, compatible reaction time and disjunctive reaction time for 25 students. The results indicated variable differences in length of reaction time, i.e., simple RT < compatible RT < disjunctive RT. A sign test, performed for both mean and median scores, was significant. It was concluded that reaction time did increase as a function of uncertainty.

Energetic effects of stimulus intensity on prolonged simple reaction-time performance

2010 ◽  
Vol 74 (5) ◽  
pp. 499-512 ◽  
Author(s):  
Robert Langner ◽  
Klaus Willmes ◽  
Anjan Chatterjee ◽  
Simon B. Eickhoff ◽  
Walter Sturm
Keyword(s):  
Reaction Time ◽  
Stimulus Intensity ◽  
Simple Reaction Time ◽  
Simple Reaction ◽  
Time Performance ◽  
Reaction Time Performance
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