“…The former issue is not considered in the present study, and will therefore not be dealt with. The interested reader is referred to the relevant studies (Dimitrovsky, 1964;Fenster, 1967;Fenster & Goldstein, 1971 ;Fenster, Blake, & Goldstein, 1977;McCluskey, Niemi, & Albas, 1978). As for the latter issue, it appears that, at least between age 5 and 10, there is a gradual and steady increase in the number of correct identifications with age (Dimitrovsky, 1964;Fechner, 1978;Fenster, 1967;Fenster et al, 1977;Gates, 1927).…”