Young children who have paranormal capacities sense the stigma with respect to the issue from those around them.
By creating an imaginary friend the impetus of that stigma is alleviated, now it is not them having extrasensory experiences it is someone else.
Majestica, this conclusion can only be considered valid in a case where there is a clear indication the child does have some form of Extra Sensory
Perception.
What you have presented does allude to that, with regard to having few friends that she has 1 or 2
good friends is not abnormal.
What I would recommend is de-emphasizing the uniqueness of her Extra Sensory Experiences from the context of being surprised when it happens (facial
expressions, body language) of significant others (parents).
In other words reacting less in respect to it being a surprised or something scary. Positive reinforcement
is also not necessarily the proper thing to do.
Its important to realize that whatever reaction is
made will be reflected in her life outside parental
control. That could cause problems for her with
respect to pier relationships.
Part of the reason that she is emphasizing her imaginary friend less is because her parents are
less prone to react either positively or negatively
to the paranormal events (they have gotten used to
it).
Its not a matter of being serious about it but rather
expressing a more casual affect, as far as punishment I would not recommend that at all.
Also Majestica, I want to stress that more conventional methodologies with respect to addressing this issues should be reviewed. They offer insights
into matters which are relevant to addressing this matter.
The advise provided by Banshee and astrocreep should not be ignored simply because you feel what I have explained fits your particular situation.
In conclusion what I recommend is a "Holistic" approach which takes into consideration all potential conclusions drawing from each what appears to
fit.
This is not a diagnosis but a summation based upon what information you have provided.
Enjoy the net