A field experiment tested effects of "Channel One" commercials on impulsive preadolescent students' purchasing preferences, such as product liking and likelihood of buying regularly advertised products. A total of 67 sixth-grade middle school students participated in the field experiment. Students who viewed "Channel One' daily were in eight first-period classes while students from the control school were in their homeroom class (experimental, N=51; control, N=16). The most significant findings were that more impulsive students were slightly (10%) more likely to want to buy products advertised on "Channel One" than were less impulsive students. Females, regardless of impulsivity, were more likely to predict they would spend more on products advertised, and exhibited more impulsive-type purchasing, compared to their male peers. Future research should concentrate on changes in attitude to products advertised on the program--studies should compare beginning of the school year and end of the school year attitudes. (Contains 5 tables of data, 2 figures, and 31 references.) (Author/NKA)