Table 1 Overview of survey measures MyMovez project – Phase I

Self-esteem

Rosenberg Self-esteem scale

[49]

Body esteem

Figure Rating Scale

[50, 51]

Need to belong

Need to belong Scale

[52]

Fear of Negative Evaluation

Brief Fear of Negative Evaluation Scale

[53]

Happiness

The Faces Scale

[54]

Pro-social behavior

Strengths and Difficulties Questionnaire

[55]

Public individuation

Public individuation

[56]

Self-profiling of personality characteristics

Descriptive

[57]

Theory of Planned Behavior (attitude, self-efficacy, descriptive and injunctive norms, and intentions)

Theory of Planned Behavior constructs

[26, 58, 59]

Motivation

Adapted measures from the Health Care SDT Packet

Perceived competence scale

[60]

Fogg Behavior Model (determinants motivation and ability with antecedents pleasure/pain, hope/fear, and social acceptance/rejection, time, money, physical effort, brain cycles, social deviance, and non-routine)

- Fogg Behavior Model

- Theory of Planned Behavior constructs

- Adapted measures from the Physical Activity Enjoyment Scale PACES

- Adapted measures from the Perceived Benefits of Physical Activity Scale

- Adapted measures from the Self-Report-Habit-index Scale (SRHI)

[29] [58, 59] [61] [62] [63]

Opinion Leadership

- King and Summers Opinion Leadership scale

- Opinion Leadership scale

[23] [24]

Perceived social support

Social support scale

[64]

Consumption behavior (hunger, thirst, including specific Dutch snack and drink items)

- Food Frequency Questionnaire (FFQ) based on the Dutch EPIC Frequency Questionnaire

[65] [12]

Role models or ‘prototypes’ of consumption behavior

Prototype-Willingness Model

[66]

Self-regulatory resources (internal and external attribution)

Nutrition Locus of Control

[67]

Dieting behavior

Descriptive

Physical environment diet (availability and accessibility)

- Questionnaire to assess determinants related to fruit and vegetable intakes in children

- Child-reported family and peer influences questionnaire

[68, 69]

Parental role modeling

adapted from the Home Environment Scale

[70]

Occurrence unhealthy eating behaviors

Descriptive / filler items

Athletic competence

Perceived Competence Scale for Children

[71, 72]

Barriers to Physical Activity (body-related, resources, social, fitness, and inconvenience barriers)

Barriers to PA scale

[73]

Daily activities and sports participation (which sports they play and like)

Descriptive / filler items

Environmental factors

Descriptive

[74]

Habitual physical activity

- Activity Questionnaire for Adolescents and Adults

- Questionnaire to Assess Health-enhancing physical activity

- ‘Day in the life’ Questionnaire

[75] [76,77,78] [79]

Social norms and perceived physical activity

Adapted from TPB constructs

[58, 59]

Injury check

Descriptive

Motives for being physically active

The Self-presentation Motives for Physical Activity Questionnaire

[33]

Television (TV) exposure (duration of exposure, type of TV stations, genre TV programs)

Descriptive

[80] [81]

Internet and social media exposure (duration of exposure, type of social media platforms)

Descriptive

[80] [81]

Video blog (Vlog) exposure (duration of exposure, names of Vloggers, type of Vlogs)

Descriptive

Gaming behavior (duration, type and genre of games, which devices used, most liked)

Descriptive

House rules on media use (screen-based activities)

Activity Support Scale for Multiple Groups

[82]

Mealtime media use

Descriptive / filler items

[83]

Use of health apps and Wearables (most liked, app effectiveness)

Descriptive / filler items

Evaluation research and app (liking en enjoyment research and app, games, avatar, jokes and memes, and Social Buzz)

Descriptive / filler items

Naming favorite foods, music, brands, animals, movies, celebrities, sports and sports heroes, daily planning, etc.

Descriptive / filler items