Bachman, J.G.; Johnston, L.D.; and O'Malley, P.M. "The Monitoring the Future Project after Seventeen Years: Design and Procedures." (Monitoring the Future Occasional Paper 33). Ann Arbor, Mich.: Institute for Social Research, 1991.
2.
Gaddy, G.D. "Television's Impact on High School Achievement." Public Opinion Quarterly50(1986 ): 340-59.
3.
Koretz, D. "What Happened to Test Scores, and Why?"Educational Measurement: Issues and Practice11( 1992): 7-11.
4.
Reynolds, A.J. "Note on Adolescents' Time-Use and S c i e n t i f i c L i t e r a c y. " Psychological Reports68(1991): 63-70.