The effects of contingent music on the intensity of noise in junior high home economics classes.

The effects of quiet-contingent music on the general noise levels of four seventh- and eighth-grade classrooms were investigated. Following a baseline procedure, popular radio music was used to reinforce maintenance of noise below an acceptable level of intensity, 70 decibels, in three of the four classes. In the fourth class, a reversal design was used to show that the contingent presentation of the radio music was important to control the noise produced by the students. The teacher was free to engage in instructional activities because data collection and presentation of music were controlled by automatic apparatus.