But is she qualified for a full-time position?

It's no longitudinal study about adjuncts' effects on retention or transfer rates, but in this article the country's Poet Laureate, Kay Ryan, a long-time adjunct, provides some compelling testimony and at least one illustrious example of such unquantifiable "quality of education" factors as dedication, concern, and all-around excellence.

http://www.insidehighered.com/news/2009/10/21/ryan