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Table 2 Results of the Varimax rotated matrix of the SNS items (Test)

From: Validation of the Arabic version of the “self-evaluation of negative symptoms” scale (SNS)

Factor Item number Diminished emotional range Avolition Alogia Social withdrawal Anhedonia
There are many happy or sad things in life but I don’t feel concerned by them 6 0.755     
Watching a sad or happy film, reading or listening to a sad or happy story does not especially make me want to cry or laugh 7 0.715     
It is difficult for people to know how I feel 8 0.659     
People say I’m not sad or happy and that I’m not often angry 5 0.647     
I don’t particularly try to contact and meet friends (letters, telephone, text messaging, etc.) 4 0.552     
With friends and family, I want to talk about things but it doesn’t come out 12 0.514     
It’s hard to stick to doing things on an everyday regular basis 14   0.855    
There are many things I don’t do through lack of motivation or because I don’t feel like it 15   0.789    
I know there are things I must do (get up or wash myself for example) but I have no energy 16   0.764    
I find it difficult to meet the objectives I set myself 13   0.589    
I find it 10 times harder to talk than most people do 10    0.818   
People often say that I don’t talk much 11    0.796   
I don’t have as much to talk about as most people 9    0.784   
I prefer to be alone in my corner 1     0.871  
I’m better off alone, because I feel uncomfortable when anyone is near me 2     0.847  
I’m not interested in going out with friends or family 3     0.614  
When I imagine doing one thing or another, I don’t feel any particular pleasure in the idea 19      0.876
I find it hard to take pleasure even when doing things I have chosen to do 18      0.873
I am not interested in having sex 20      0.450
I don’t take any great pleasure in talking to people 17      0.425
Percentage of variances explained   31.90 10.57 8.95 7.62 6.97