An assortment of approaches to accounting for the phenomena of SLA called broadly 'sociolinguistic approaches' because they take their inspiration from work in socio-linguistics of the 1960s and 1970s, view variability itself to be at the core of what L2 speakers know about the L2, rather than an epiphenomenon induced by interference at the level of performance. That is, they view competence as variable and not homogeneous. As put by Towell and Hawkins (1994), any attempt to evaluate socio linguistic approaches to SLA must consider how these approaches deal with the five observations about SLA: transfer, staged development, systematicity, variability and incompleteness. First, transfer seems to be rarely considered in these approaches. For example, neither 'transfer' nor 'interference' even figures in the indexes of two representative texts like Tarone (1988) or Ellis (1992).