Table 2 Studies included in review by design type
Study design | Study |
|---|---|
1. Commitment intervention versus minimal contact/ assessment only | Clifford 1991 [36], Balk-Møller 2017 [38], Maruyama 2010 [40], Kegler 2016 [41] |
2. Commitment intervention versus same intervention without commitment condition and variation of commitment condition | Nyer 2010 [39] |
3. Commitment intervention versus minimal contact/ assessment, same intervention without commitment condition, and variation of commitment condition | Franzini 1980 [42] |
4. Commitment intervention versus variation(s) of commitment condition only | Black 1983 [43], Craighead 1989 [45], Dubbert 1984 [46], Ureda 1980 [44] |