Dear Rao,
I am not sure of your background, as I have not checked your profile. You can see mine at
<link outdated-removed> ( Search On Cite | Search On Google ) by clicking on "About us".
Soft Skills is being offered as a module. I do not know if there is any university with a Department on Soft Skills manned by sufficient staff. Even Management as a subject Group with a PhD in that field took a long time to get established when compured to Pure Science subjects (Please correct me if I in in the wrong).
I have searched the web to see if any scholarly articles are published on Soft Skills and did not find many. Even the ones I found are not on SS specifically.
As Giridhar has suggested, we need to come up with our hypotheses for a MPhil or PhD thesis and get it accepted, if our intention is to do a degree. One of the aims could be to study if there is any difference in the job opportunities or grades obtained between students undertaking soft skills course and those that do not. However, it could lead to ethical questions if we are offering to some students and not others.
Please see my post on Research Methodology (ppt slides attached) at CiteHr.
Have a nice day.
Simhan