“…The remaining 7 8 % may be attributed to factors that were not measured in this study, including auditory perception (Abrahamson et al, 1979;Belka & Williams, 1979;Stanovich, Cunningham, & Cramer, 1984), visualperceptual and perceptual-motor (Lindgren, 1978;Satz, Taylor, Friel, & Fletcher, 1978), behavioral-emotional factors (Birrell, Phillips, & Scott, 1985;Kohn & Rosman, 1974), and demographic variables (Butler, Marsh, Sheppard, & Sheppard, 1982;Satz et al, 1975).…”