SE differs from related motivational constructs, such as outcome expectancy, selfconcept, self-esteem or locus of control, which are more general self-descriptive constructs that incorporate many forms of self-knowledge and self-evaluating feelings (Pajares, 1996). Bandura (1986) argues that SE refers to personal judgments of one’s capabilities to organize and execute courses of action to attain specific goals, and measuring SE should focus on the level, generality and strength across specific activities and contexts. Therefore, whereas a subject-specific self-concept test item might require the respondent to react to the statement “I am a good student in Mathematics”, the SE item would require reaction to the statement “I can solve percent problems”. Ignoring of this tenet, leads to insufficient research findings, and that is why Pajares (1996) argues that if the purpose of a study is to find relationships between SE and performance, SE judgments should be consistent with and tailored to the domain of the task under investigation.