Fisheries Extension Education (2+1)

The Range of Audio-Visual Aids

Extension agents often use sophisticated audio-visual aids which require electricity and complex machinery such as projectors or television sets. But there are many simple aids that the agent can make locally, and these have several advantages. They do not require a power source or heavy equipment, they do not cost much to produce and they can be made to suit the precise needs of the agent. Between these two extremes lies a wide range of more or less sophisticated aids. The distinction between a mass medium and an audio-visual aid lies only in the way it is used. All the mass media described earlier can be used as audio-visual aids. A film is a mass medium, in that it is shown to large audiences in many different places; but for an individual extension agent who uses it to increase the impact of a talk, it is an audio-visual aid.