While there are many excellent legal self-help initiatives, there are few studies that evaluate those self-help programs after the fact, i.e. after the self-represented litigant has used the software or the court forms and system (e.g. in small claims court) to resolve a problem or right a wrong.
But the surveys that do exist can be helpful to others. See, for example, this report, which you can find at the SRLN Stories page – and here is the direct link:
Orange County, CA and the State of Texas Conduct User Experience Research and Learn that SRLs in Civil Cases Can E-File (News 2016)