A study found a strong correlation between parental bonding and adolescent drug use. Children with stronger bonds to their parents were far less likely to try drugs or alcohol. After examining their data more closely, the researchers discovered that parental bonding was really a predictor for teen religiosity. Consequently, high levels of religiosity, rather than parental bonding, actually prevent drug use. This means that religiosity was a(n) a. paradigm shift. b. issue of reflexivity. c. spurious variable. d. intervening variable.