Electronic supplementary material
Confirmatory factor analysis of function scores
Internal Emotion Regulation
External Emotion Regulation
To produce a sense of being real when I feel numb and “unreal”
To relieve feelings of sadness or feeling “down”
To distract me from unpleasant memories
To punish myself
To stop feeling alone and empty
To experience physical pain in one area, when the other pain I feel is unbearable
To stop me from acting out ideas of killing myself
To stop my parents from being angry at me
To stop people from expecting so much from me
To change my body image and/or appearance
To show others how hurt or damaged I am
To avoid getting in trouble for something I did
To get out of doing something that I don’t want to do
To belong to a group
To release frustration
To release anger
To release unbearable tension.
To experience a “high” like a drug high
To provide a sense of excitement that feels exhilarating
For sexual excitement
To prove to myself how much I can take
Mean scores (SD)
1. Internal Emotion Regulation
2. Social Influence
3. External Emotion Regulation
4. Sensation Seeking
Confirmatory factor analysis of addictive features
The self-injurious behaviour occurs more often than intended?
The severity in which the self-injurious behaviour occurs has increased (e.g., deeper cuts, more extensive parts of your body)?
If the self-injurious behaviour produced an effect when started, you now need to self-injure more frequently or with greater intensity to produce the same effect?
This behaviour or thinking about it consumes a significant amount of your time (e.g., planning and thinking about it, collecting and hiding sharp \objects, doing it and recovering from it)?
Despite a desire to cut down or control this behaviour, you are unable to do so?
You continue this behaviour despite recognizing that it is harmful to you physically and/or emotionally?
Important social, family, academic or recreational activities are given up or reduced because of this behaviour?
Mean scores (SD)