in understanding the basic principle of human performance. This new development is brought about by several causes. The main among them is the growing interest of industry and military in discovering the general principles of performance, rather than investigating specific situations of human performance. We shall briefly samples some work done in this area.
Perceptual Motor Performance Principles
Perception motors skills form an important factor in the modern industrial performance. This ranges from simple perceptual motor skills such as involved in packing operations to extremely complex perceptual motor skills as involved in car driving or airplane flying. These perceptual motor skills are broadly classified into five groups, as follows:
- Positioning Movements: The movement which are from one specific location to another specific location, that is, like turning the radio knob for tuning in to a particular station.
- Static Movements: These are not actual movements, but basically the motor operations that involve the maintenance of a constant position over a certain period of time. This requires persistent muscular pressure for some time. As for example, in some water taps you are required to apply continuous pressure in order to get a steady flow of water.
- Continuous Movements: Movements that are continuously regulated, such as keeping a car on a track in response to the turns of the road.
- Repetitive Movements: Movements which are repeated continuously such as winding a watch.
- Serial Movements: These are essentially different movements that are involved in a well-knit serial sequence. For example the step by step movements which are done, while preparing a sandwich.
The above classification of the perceptual motor movements has a wide variety of applications. It serves as a tool of research in the determination of the individual differences in skills, and also in the determination of how a particular knowledge is used or applied. Aptitude tests and perceptual motor tests are important factors in assessing the ability of performance of an individual.
Yet another approach to the understanding of the perceptual motor skill is demonstrated using the factor analytic techniques. Some such actors in the perceptual motor skills are already discovered. For example, the wrist-finger speed, which is the first factor, and the finger dexterity speed, which is the second factor. The next consecutive factors include the speed of a movement, manual dexterity and aiming.
However the perceptual motor skills required a lot of muscular work as a consequence of which, there can be a reduction in the ability to work, owing to prior work. This instance is known as fatigue. However the nature of fatigue is divergent. Reduction in work can be caused by a variety of factors which are mainly psychological and physiological. There is every possible evidence, which makes us believe that the attitude towards work of an individual is an important determining factor in his ability of doing work. However, there is absence of any sound physiological measure to detect the presence or absence of an attitude to perform.