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Table 3 Process evaluation measures assessed in intervention group

From: Active video games as a tool to prevent excessive weight gain in adolescents: rationale, design and methods of a randomized controlled trial

Process evaluation concepts Items and answering categories Instrument/source
1) Adherence to the intervention   
Usage of Move games Did you succeed in playing the move games for at least one hour per week? Specifically developed for the current study1
- Yes, I played the move games for at least one hour per week
- No, In some weeks I failed to play the move games for at least one hour
- No, I never succeed in playing the move games for at least one hour per week
Reasons for not playing (the minimal of one hour per week) Why did you not managed to play the move games for at least one hour per week? Specifically developed for the current study1
- I was too hot
- I was not allowed by my parents
- There was somebody else playing on the Move.
- The move console did not worked properly
- The move games did not respond well to my movements
- I think the move games are too tiring
- I think the move games are boring
- We have not enough space to play to move games well
- I had not enough move games
- I did not have time
- I think the move games are stupid
- I had to many other things to do
- There wasn’t somebody to play with and it is boring to play the games by myself
- I was injured
- I rather play non active games
- Other, namely …
2) Opinion of the move games and the intervention   
Enjoyment with respect to playing the Move games I enjoy playing the Move games (totally disagree (1) – totally agree (7)) Intrinsic Motivation Inventory (sub scale enjoyment) [54]
Playing the Move games is fun to do (totally disagree (1) – totally agree (7))
I think playing the Move game is boring (totally disagree (1) – totally agree (7))
Playing the Move games could hold my attention (totally disagree (1) – totally agree (7))
I would describe playing Move games as very interesting (totally disagree (1) – totally agree (7))
I think playing the Move games is quite enjoyable (totally disagree (1) – totally agree (7))
While playing the Move games, I was thinking about how much I enjoyed it (totally disagree (1) – totally agree(7))
Most played move game Which game did you play most often? Specifically developed for the current study1
Most enjoying move game Which game did you like the most? Specifically developed for the current study1
Ease of use It’s easy for me to learn how the Move games work (totally disagree (1) – totally agree (5)) Davis, 1989; Hsu & Lu, 2004 [55, 56]
Playing the Move games is easy for me (totally disagree (1) – totally agree (5))
Perceived competence I believe I am good in playing Move games (totally disagree (1) – totally agree (5)) Intrinsic motivation inventory (subscale competence) [54]
I think I am better at playing the Move games than other people of my age and gender (totally disagree (1) – totally agree (5))
I am generally happy with my gaming performance (totally disagree (1) – totally agree (5))
Perceived physical exertion of playing move games How would you rate the intensity level of playing the Move games? Specifically developed for the current study1
- Light, little body movements are required while playing on the Move, and my breath rate does not accelerate;
- Moderate, I move my body quite a lot while playing on the Move and my breath rate accelerates a little bit;
- Hard, I have to move a lot and fast, I get out of breath and I am sweating during playing on the Move
Opinion on the amount of provided Move games What do you think about the amount of provided move games? (too little - exactly right - too much) Specifically developed for the current study1
Self purchased move game Did you bought, received, borrowed or downloaded other Move games in addition to the games we provided you? Specifically developed for the current study1
3) Game context   
Move game companion With whom do you usually play the Move games? (by myself, with my parents, with my brother/sister, with my friends, with somebody else, namely …) Specifically developed for the current study1
Location of PlayStation move console Where was the PlayStation PlayStation®Move located most of the time? (Living room, my own bedroom, my brother’s or sister’s bedroom, in the attic, in a shared game room, somewhere else, namely …) Specifically developed for the current study1
4) Potential adverse effects   
Occurrence of injuries because of playing with the move games Did you hurt or injured yourself during playing with the Move? (yes; no) Specifically developed for the current study1
What kind of injury occurred during game play? (bruise; graze; strained muscles or tendons; bruised something (e.g. ankle, wrist); broke something (e.g. leg, wrist, arm); some other injury, namely ….)
5) Activity replacement Can you think back about the time you did not have the Move games yet, what did you do with the time you now spend on active gaming? Simons et al., (2012) [45]
6) Intention to continue playing the move games 1. I intend to continue playing the Move games; Based on Theory of Planned Behavior [57]
  2. I expect to continue with playing the Move games (totally disagree (1) – totally agree (5)).  
  1. 1The questions that were specifically developed for the current study were based on focus groups and/or a previous survey study on active and non-active gaming among adolescents [19, 22] and were pilot-tested in gaming adolescents to assure understanding and face validity.