The nature of language and the way it is used often lead to misunderstandings. These misunderstandings can be identified by four barriers to effective communication: lack of common experience, confusion between the symbol and the symbolized object, overuse of abstractions, and interference. [Figure 3-3]
Lack of Common Experience
Lack of common experience between the communicator (instructor) and the receiver (student) is probably the greatest single barrier to effective communication. Communication can be effective only to the extent that the experiences (physical, mental, and emotional) of the people concerned are similar.
Many people seem to believe that words transport meanings from speaker to listener in the same way that a truck carries bricks from one location to another. Words, however, rarely carry precisely the same meaning from the mind of the instructor to the mind of the student. In fact, words, in themselves, do not transfer meanings at all. Whether spoken or written, words are merely stimuli used to arouse a response in the student.
The student’s past experience with the words and things to which they refer determines how the student responds to what the instructor says. A communicator’s words cannot communicate the desired meaning to another person unless the listener or reader has had some experience with the objects or concepts to which these words refer. Since it is the students’ experience that forms vocabulary, it is also essential that instructors speak the same language as the students. If the instructor’s terminology is necessary to convey the idea, some time needs to be spent making certain the students understand that terminology.
For example, a maintenance instructor tells a student to time the magnetos. A student new to the maintenance field might think a stopwatch or clock would be necessary to do the requested task. Instruction would be necessary for the student to understand that the procedure has nothing to do with the usual concept of time.
The English language abounds in words that mean different things to different people. To a farmer, the word “tractor” means the machine that pulls the implements to cultivate the soil; to a trucker, it is the vehicle used to pull a semi trailer; in aviation, a tractor propeller is the opposite of a pusher propeller. Each technical field has its own vocabulary. Technical words might mean something entirely different to a person outside that field, or perhaps mean nothing at all. In order for communication to be effective, the students’ understanding of the meaning of the words needs to be the same as the instructor’s understanding.
Confusion Between the Symbol and the Symbolized Object
Confusion between the symbol and the symbolized object results when a word is confused with what it is meant to represent. Although it is obvious that words and the connotations they carry can be different, people sometimes fail to make the distinction. An aviation maintenance technician (AMT) might be introduced as a mechanic. To many people, the term mechanic conjures up images of a person laboring over an automobile. Being referred to as an aircraft mechanic might be an improvement in some people’s minds, but neither really portrays the training and skill of the AMT. Words and symbols do not always represent the same thing to every person. To communicate effectively, speakers and writers should be aware of these differences. Words and symbols can then be chosen to represent what the speaker or writer intends.
Overuse of Abstractions
Abstractions are words that are general rather than specific. Concrete words or terms refer to objects people can relate directly to their own experiences. These words or terms specify an idea that can be perceived or a thing that can be visualized. Abstract words, on the other hand, stand for ideas that cannot be directly experienced, things that do not call forth mental images in the minds of the students. The word aircraft is an abstract word. It does not call to mind a specific aircraft in the imaginations of various students. One student may visualize an airplane, another student might visualize a helicopter, and still another student might visualize an airship. [Figure 3-4] Although the word airplane is more specific, various students might envision anything from a Boeing 777 to a Piper Cub.
Aircraft engines represent another example of abstractions. When an instructor refers to aircraft engines in general, some students might think of jet engines, while others would think of reciprocating engines. Even reciprocating engine is too abstract since it could be a radial engine, an inline engine, a V-type engine, or an opposed type engine. Use of the technical language of engines, as in Lycoming IO-360, would narrow the engine type, but would only be understood by students who have learned the terminology particular to aircraft engines.
Abstractions should be avoided in most cases, but there are times when abstractions are necessary and useful. Aerodynamics is applicable to all aircraft and is an example of an abstraction that can lead to understanding aircraft flight characteristics. The danger of abstractions is that they do not evoke the same specific items of experience in the minds of the students that the instructor intends. When such terms are used, they should be linked with specific experiences through examples and illustrations.
For instance, when an approach to landing is going badly, telling a student to take appropriate measures might not result in the desired action. It would be better to tell the student to conduct a go-around since this is an action that has the same meaning to both student and instructor. When maintenance students are being taught to torque the bolts on an engine, it would be better to tell them to torque the bolts in accordance with the maintenance manual for that engine rather than simply to torque the bolts to the proper values. Whenever possible, the level of abstraction should be reduced by using concrete, specific terms. This better defines and gains control of images produced in the minds of the students.
Some barriers to effective communication can be controlled by the instructor. Interference, or the prevention of a process or activity from being carried out properly, is composed of factors outside the control of the instructor These factors include physiological, environmental, and psychological interference. To communicate effectively, the instructor should consider the effects of these factors.
Physiological interference is any biological problem that may inhibit symbol reception, such as hearing loss, injury, or physical illness. These and other physiological factors can inhibit communication because the student is not comfortable. The instructor must adapt the presentation to allow the student to feel better about the situation and be more receptive to new ideas. Adaptation could be as simple as putting off a lesson until the student is over an illness. Another accommodation could be the use of a seat cushion to allow a student to sit properly in the airplane.
With the advent of advanced avionics, multitasking has become a form of physiological interference. The term multitask comes from a computer’s ability to simultaneously execute more than one program or task at a time. Although it now refers to humans performing multiple tasks simultaneously, humans are not computers. Research shows that although human comprehension can handle two simple, low-level cognitive tasks at once, a higher level cognitive task takes brain function and concentration to perform optimally. Adding even a simple activity diminishes the comprehension and recall of both. Research shows that multitasking is just a series of constant micro-interruptions and “stop-go” decisions, all of which tend to reduce mental and motor performance.
Environmental interference is caused by external physical conditions. One example of this is the noise level found in many light aircraft. Noise not only impairs the communication process, but also can result in long-term damage to hearing. One solution to this problem is the use of headphones and an intercom system. If an intercom system is not available, a good solution is the use of earplugs. It has been shown that in addition to protecting hearing, use of earplugs actually clarifies speaker output. Vibration is another possible example of environmental interference, applicable to rotary wing aircraft.
Psychological interference is a product of how the instructor and student feel at the time the communication process is occurring. If either instructor or student is not committed to the communication process, communication is impaired. Fear of the situation or mistrust between the instructor and student could severely inhibit the flow of information.