Internal consistency reliability and construct validity of the Astley-Francis Scale of Attitude toward Theistic Faith Revised among Muslim, Christian, and religiously unaffiliated secondary school students in England

This paper explores the psychometric properties of the seven-item Astley-Francis Scale of Attitude toward Theistic Faith among Muslim secondary school students (N = 1,146) in England, surveyed alongside Christian (N = 575) and religiously unaffiliated (N = 361) students, in a sample in which Muslim students comprise the majority. The data demonstrated a satisfactory level of internal consistency reliability among all three groups, although less good among the Muslim students: Muslim (α = .79), Christian (α = .92), and religious unaffiliated (α = .86). The shorter five-item Astley-Francis Scale of Attitude toward Theistic Faith Revised provided a higher level of internal consistency reliability across all three groups: Muslim (α = .85), Christian (α = .94), and religiously unaffiliated (α = .95) and is commended for further use.