Table 3 Results of the Varimax rotated matrix of the SNS items (Retest)

People often say that I don’t talk much

I don’t have as much to talk about as most people

I find it 10 times harder to talk than most people do

With friends and family, I want to talk about things but it doesn’t come out

It’s hard to stick to doing things on an everyday regular basis

I know there are things I must do (get up or wash myself for example) but I have no energy

There are many things I don’t do through lack of motivation or because I don’t feel like it

I find it difficult to meet the objectives I set myself

I’m better off alone, because I feel uncomfortable when anyone is near me

I don’t particularly try to contact and meet friends (letters, telephone, text messaging, etc.)

I prefer to be alone in my corner

I’m not interested in going out with friends or family

When I imagine doing one thing or another, I don’t feel any particular pleasure in the idea

I find it hard to take pleasure even when doing things I have chosen to do

I don’t take any great pleasure in talking to people

I am not interested in having sex

People say I’m not sad or happy and that I’m not often angry

It is difficult for people to know how I feel

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

There are many happy or sad things in life but I don’t feel concerned by them

Percentage of variances explained