Although S knows nothing of the rules of formation, the redundant strings are more easily memorized than random strings. Ss group and recode the redundant strings, thus avoiding the interference effects that would be expected for the uncoded strings. In agreement with earlier studies, the amount of material learned increases when the strings are redundant, but the amount of information, measured in bits, decreases. (PsycINFO Database Record (c) 2006 APA, all rights reserved)