SOLO stands for STRUCTURE OF OBSERVED LEARNING OUTCOMES. It was created by John Biggs.
According to him, when learning progresses it becomes more complex. SOLO is a means of classifying learning outcomes in terms of their complexity – a useful tool for implementing constructive alignment. At first we pick up only one or few aspects of the task (unistructural),then several aspects but they are unrelated (multistructural), then we learn how to integrate them into a whole (relational), and finally, we are able to generalised that whole to as yet untaught applications (extended abstract).
Taken from http://www.johnbiggs.com.au/solo.html
–david tao, mc–