TABLE 3. Independent-Group Effect Sizes Based on Formula 1

Intervention

Sample total

Outcome measures

Effect size value—between groups


Study 1, MST versus SAU (Henggeler et al., 1999) 118 Personal experiences inventory: alcohol/marijuana and other drugs; self-reported delinquency Posttreatment
    Substance use = 0.38
    Externalizing = 0.09
6 months
    Substance use = 0.10
    Externalizing = 0.09
Study 2, IT versus CBT (Kaminer et al., 1998, 1999) 32 Teen addiction severity index: substance use, psychological Posttreatment (3 months)
    Substance use = –0.35
    Internalizing = 0.30
15 months
    Substance use = –0.14
    Internalizing = 0.30
Study 3, FBT versus ICPS (Azrin et al., 2001) 56 Days using drugs; parent and youth happiness with parent and youth scales: drug use, illicit behavior, total scale; life satisfaction scale: drug use, total scale score; child behavior checklist: delinquency; youth self-report: delinquency; Eyberg problem behavior inventory: problem, intensity; frequency of arrest; Beck depression inventory Posttreatment
    Substance use = 0.21
    Externalizing = –0.02
    Internalizing = 0.16
6 months
    Substance use = 0.15
    Externalizing = –0.35
    Internalizing = 0.28
Study 4, CBT versus PET (Kaminer et al., 2002) 88 Teen addiction severity index: alcohol problems, substance-abuse problems, psychological Posttreatment (3 months)
    Substance use = 0.13
    Internalizing = 0.03
9 months
    Substance use = –0.02
    Internalizing = 0.20
Study 5, EBFT versus SAU (Slesnick et al., 2005) 124 POSIT; days use of drugs and alcohol Posttreatment
    Substance use = 0.02
    Externalizing = –0.29
    Internalizing = –0.15
6 months
    Substance use = –0.02
    Externalizing = –0.18
    Internalizing = –0.12
12 months
    Substance use = –0.03
    Externalizing = –0.12
    Internalizing = –0.15
Study 6, SS versus SAU (Najavits et al., in press)

Personal experiences inventory: effects from drug use, social benefits of drug use, polydrug use, psychological benefits of drug use, transitional drug use, preoccupation with drugs, loss of control, deviant behavior; adolescent psychopathology scale: substance-use disorder, somatization, major depression, self-concept; trauma symptom checklist for children's sexual concerns, sexual distress

Posttreatment
    Substance use = 0.94
    Externalizing = 0.83
    Internalizing = 0.10
3 months
    Substance use = 0.03
    Externalizing = 0.59


    Internalizing = –0.30