Abstract: This is a report on preliminary study in the training of steel workers to judge the flames of converters. During the work of operating the converters, the workers can only depend on the conditions of flames at the openning of the converter for the judgment of the physico-chemical process going on inside the furnace. Becatise of the extremely strong intensity and great changeability of flames and the background unfavorable for the clear contrast of perceptual objects, and also because Of the difficulty in synthetically responding to a compound stimulus, it is rather hard for the workers to master the technique of judging the flames. In order to overcome such difficulties, the investigators first summarized the experience of workers. In the course of training, the following methods were used: 1) to single out the visual objects and establish connections among visual signals, 2) to master gradually the differentiation of fine details, 3) to make use of the localization of flames in time and space, 4) to apply the method of visual and verbal reinforcements. The effect of seven-teen days' tralningby the new method exceeded the several months' learning in the past.

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