Physics Lab Equipment

LEMI-67 Apparatus for Testing Human Reaction Time

LEMI-67 Apparatus for Testing Human Reaction Time


The time interval between the receptor receiving stimulus and the effector to react is called the reaction time. By measuring the reaction time, the functional level at different aspects of the reflex arc of human nervous system can be understood and evaluated. The faster the body reacts to stimuli, the shorter the reaction time, and the better the flexibility. 

Among the many factors that cause traffic accidents, the physical and mental status of cyclists and drivers is particularly important, especially the speed of their reaction to traffic lights and car horns, often determines the occurrence and severity of traffic accidents. Therefore, it is of great significance to study the reaction speed of cyclists and car drivers in different physiological and psychological conditions for reducing the occurrence of traffic accidents and ensuring the safety of their own lives and others. 

This apparatus is designed with reasonable and practical configuration. Its experiment content is rich, that can simulate the driver's actions on handbrake or footbrake respectively, and can study human reaction time from both aspects of vision and auditory. At the same time, this apparatus can be used to analyze the reaction characteristics of drunken driving behavior. It can still be used to test the reaction time of people of different age ranges. Please click Experiment Contents to find more information about this apparatus.

Using this apparatus, students can perform the following experiments:

1. Study the braking reaction time of cyclist or car driver when the signal light is changed. 

2. Study the braking reaction time of cyclist when hearing the sound of a car horn.

Main Specifications

Car hornvolume continuously adjustable
Signal lighttwo sets of LED arrays, red and green colors respectively
Timingaccuracy 1 ms
Time range for measurementunit in second, signal may appear randomly within the set time range
DisplayLC display module

Parts List  

Main electric unit1 (horn mounted on its top)
Simulated car braking system1
Simulated bicycle braking system1
Power cord1
Instruction manual1


Test procedures

(Click figure to enlarge)

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