Others may use less frequently, but their use causes recurrent problems related to family,
school, work, or other important activities (e.g ., repeated absences at work; neglect of fam-
ily obligations). Periodic cannabis use and intoxication can negatively affect behavioral
and cognitive functioning and thus interfere with optimal performance at work or school,
or place the individual at increased physical risk when performing activities that could be
physically hazardous (e.g., driving a car; playing certain sports; performing manual work
activities, including operating machinery). Ar guments with spouses or parents over the