“…181-182), one would expect, from the perspective of conditioning theory, that children, who have had less extensive fearless experiences with harmless stimuli than adults (e.g., public places), would be more vulnerable to develop clinical phobias. Another puzzling issue concerns the high prevalence of fear and phobia among mentally retarded children (Gullone, 1996;Gullone, Cummins, & King, 1996;Muris, Merckelbach, De Jongh, & Ollendick, 2002;Ramirez & Kratochwill, 1997) and less educated people (Arnarson, Gudmondsdottir, & Boyle, 1998).…”