Bandura further notes, “strength of self-efficacy is measured across a wide range of performance
within an activity domain” ([5], p.17). In fact, social workers’ sense of efficacy may differ across the different tasks that they are required to perform [7]. For this reason the construction of a valid self-efficacy scale, requires sound conceptual specification of the determinants governing performance in a given domain of functioning and the impediments to realizing desired attainments [42]. To construct a self-efficacy scale is therefore necessary to rely on a good conceptual analysis of the relevant domain of functioning, since this knowledge specifies which aspects of personal efficacy should be measured.