Types of interventions
Experimental intervention
Primarily, the interventions should be labelled motivational interviewing
(M)) or motivational enhancement therapy (MET). The
intervention could basically be offered in threeways: (1) as a standalone
therapy, (2) MI integrated with another therapy, or (3) MI
as a prelude to another therapy (e.g. cognitive behavioral therapy).
Only individual, face-to-face interventions were included.We excluded
group interventions, and interventions not given in person
(e.g. computer-delivered or telephone interventions). Because
most psychosocial interventions havemany unspecific elements in
common, and because terms like “motivational intervention” and
“motivational interview” not necessarily refers to Miller’s specific
program of MI, we included only studies that reviewed audio or
video recordings to ensure that the intervention given was indeed
MI.
Studies had to include checks of audio- or videotaping of sessions
in order to assess fidelity of treatment.
Control intervention
The comparator could be no intervention, waiting list control,
placebo psychotherapy or other active therapy.
Types of interventionsExperimental interventionPrimarily, the interventions should be labelled motivational interviewing(M)) or motivational enhancement therapy (MET). Theintervention could basically be offered in threeways: (1) as a standalonetherapy, (2) MI integrated with another therapy, or (3) MIas a prelude to another therapy (e.g. cognitive behavioral therapy).Only individual, face-to-face interventions were included.We excludedgroup interventions, and interventions not given in person(e.g. computer-delivered or telephone interventions). Becausemost psychosocial interventions havemany unspecific elements incommon, and because terms like “motivational intervention” and“motivational interview” not necessarily refers to Miller’s specificprogram of MI, we included only studies that reviewed audio orvideo recordings to ensure that the intervention given was indeedMI.Studies had to include checks of audio- or videotaping of sessionsin order to assess fidelity of treatment.Control interventionThe comparator could be no intervention, waiting list control,placebo psychotherapy or other active therapy.
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