My Choices: Efficacy and Implementation Study

20-items scale to assess the perceived quality of life. Participants can answer with 7 faces emojis (3 degrees of sadness, 3 degrees of happiness and 1 neutral).

8-items scale (Domains tangible and Emotional support), with a 5-point Likert scale ranging from 0 (None) to 4 (All of the time).

12-items scale with a 5 point Likert scale ranging from strongly disagree (-2) to strongly agree (2).

This questionnaire assesses the motivation level to change alcohol use habits. The levels used are those of the transtheoretical model of change (Prochaska \& DiClemente).

The highest score indicates the stage in which the person is (precontemplation, contemplation or action) from a possibility from -8 to 8.

15-items scale with a 7 point Likert-like scale ranging from 1 (not at all) to 7 (Exactly) to assess the type of motivation that drives the person to modify his/her alcohol use habits.

The questionnaire is based on the self-determination theory of Deci \& Ryan.

It is possible to assess the coefficient of self-determination by adding up the score of the identified and introjected motivation, and substracting to that score the external and amotivation scores. The higher is the coefficient of self-determination, the more internal is the motivation.

Subjects are asked how often, during the last 2 weeks, they were bothered by each symptom. Response options were "not at all," "several days," "more than half the days," and "nearly every day," scored as 0, 1, 2, and 3, respectively (Löwe, Williams, Kroenke, Spitzer, 2006).

A score between 0 and 4 means a minimal level of anxiety, between 5 and 9 means a mild level of anxiety, 10 to 14 means a moderate level of anxiety and a score between 15 and 21 means severe anxiety.

5-items scale with a 6 point Likert-like scale ranging from 0 (At no time) to 5 (All of the time). It is a subjective measure of the positive dimensions of mental health.

Total score is between 0 to 100. Higher the score, better the level of well-being. A score under 50 could mean a higher risk of depression.

It is a 20-items scale with a 4-point Likert-like scale from 1 (Agree strongly) to 4 (Disagree strongly).

The items are representing 5 factors, which are negative and positive Urgency, sensation seeking, premedition (lack of) and perseverance (lack of).

Scores are between 4 and 16 for each factor. The higher the score, the more impulsive is the person.

6-items scale with a 5-point Likert-like scale from Never to Really often. If a person answers often or really often 4 times or more, it means that the person shows symptoms associated with ADHD.

9-items scale with a 4-point Likert-like scale from 0 (Not at all) to 3 (Nearly every day). The total score is obtained by adding up the answer to every 9 items, ranging from 0 to 27. The score indicates the level of depression severity: 0-4 indicates none or minimal severity, 5-9 indicates a mild severity, 10-14 indicates a moderate severity, 15-19 indicates a moderately severe depression and 20-27 indicates a severe depression.

5-items scale with a 9 point scale from 0 (Not at all) to 8 (very severely). The total score can be obtain by adding up the score of every items. A score above 20 suggests moderately severe or worse impairment. Scores between 10 and 20 are associated with significant functional impairment. Scores below 10 appear to be associated with subclinical populations.

23-items scale with a 4 point-scale from ''Worse than before'' to ''Much better than before''. The ratings allow the participants to judge to what degree their life has improved in 23 domains since the last 3 months.

3-items scale. The first item can be answered with a 4-point Likert-like scale from ''None of my needs were met'' to ''Almost all of my needs were met''. The second item can be answered with a 4-point Likert-like scale from ''Really satisfied'' to ''Really unsatisfied'' and the third item can be answered with a 4-point Likert-like scale from ''No, definitely not'' to ''Yes, definitely''.

12-items scale, with three domains (positive collaboration, emotional difficulties and positive clinician input), with a 5-point Likert-like scale ranging from 0 (Never) to 4 (Always).

Total score can range from 0 to 48. The score can be obtained by adding up the score of every item. The scores from the ''emotional difficulties'' domain must be reversed. The higher the score the better is the therapeutic relationship.

Participants are asked to what extent they reached their goal about their alcohol use on a scale from 0 (Not at all) to 10 (Totally).

The participants are asked to what extent their alcohol use has caused them difficulties in the last 12 months, with a scale from 0 (Not at all) to 10 (Extremely).

The participants are asked: to what extent is it important for you to change your alcohol use habits, with a scale from 0 (Not at all) to 10 (Extremely).

The participants are asked: what do you currently think about your alcohol-use? with a scale from 0 (Not at all) to 10 (Extremely).

The participants are asked: How confident are you of reaching your goals about your alcohol-use? with a scale from 0 (Not at all) to 10 (Extremely).

Questionnaire to assess the situations in which the person is more at risk to drink and the level of confidence to not drink in this situation. The items are measured with a 0 (Never) to 10 (Always) Likert-like scale.