“…It is a comprehensive system of psychotherapy based on several theories of human behavior and behavioral change; and it strives to state its basic theoretical constructs in testable ways (Ellis, 1962(Ellis, ,1973(Ellis, , 1984Ellis & Whiteley, 1979). Because its theories are relatively simple, direct, and clear, they have been subjected to literally hundreds of controlled scientific experiments which have largely tended to support them (DiGiuseppe, Miller, & Trexler, 1979;Ellis, 1979aEllis, , 1984McGovern, 1983).…”