Abstract
Closed‐circuit television equipment was used to produce two versions of a programme on the Psychology of Learning for showing to student teachers. Programme A was designed in accordance with the suggestion that the more a presentation approximates to reality, the more effective it will be. Programme B was designed in accordance with the suggestion that a presentation will be more effective if the information is ‘pre‐compressed’ before transmission. Comparisons were made of the effectiveness for transmitting relevant information of each of the different techniques used to produce Programme A and Programme B and also of the total programmes. The findings indicated the ‘pre‐compression’ procedure to be more effective than the ‘realism’ procedure.

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