Lloyd Johnston
Lloyd Johnston
included possible students toward using
It is possible that some students know what drugs are and are not included in the tests, and migrate toward using those not included.
age blank developed eighth environmental habits high move school sensitive smoking teenage tend trends
Eighth-graders tend to be the first ones to show new trends. Most are blank slates and haven't developed habits and are more sensitive to environmental changes. As these eighth graders move up the age spectrum, the high school teenage smoking trends will follow.
declined levels peak reached recent since substances
What is significant is that the use of these substances has declined substantially since the recent peak levels reached in the mid-1990s.