“…Fuirther re.search will he needed to determine the extent of this effect. feedback was found to be more effective than simple instruction alone (Weinstein, Wicker, Cubberly, Roney, and Underwood, 1980), and the use of difficult reading materials early in the training process was found to have a debilitating effect on oerformance, suggesting that materials should progress from simple to difficult (Weinstein, Washington, Wicker, Duty, and Underwood, 1980).…”