“…However, others have not found significant changes in I.Q.. estimates as measured by this test (Alexandris and Lundell, 1968;Conners and Rothschild, 1968;Conners et al, 1969;Conners et al, 1972;Conrad et al, 1971;Rie et al, 1976aRie et al, , 1976bWerry and Sprague, 1974). Similarly, some investigators have not found significant drug effects on other tests of intelligence (Bradley and Green, 1940;Molitch and Eccles, 1937;Weiss et al, 1968).…”