Measure of Proportional Non-Chance Clustering in Free Recall:

摘要: Summary.-A new ratio of category clustering (CLT) is presented which, unlike earlier measures, uses an unconfounded estimate the number nonchance repetitions occurring in free recall sequences. The measure permits assessment individual categories independently orher and yields additional statistics which cannot be accurately measured by existing methods. Computer-generated data scored according to CLr five other measures indicate that various are not equivalent. In addition, shown confounded extraneous characteristics set items recalled. Consequently, validity conclusions based on than questioned. Current interest organization memory has generated considerable discussion (Colle, 1972; Dalrymple-Alford, 1970, 1971; Frankel & Cole, Frender Doubilet, 1974; Hudson, Roenker, Thompson, Brown, Shuell, 1969). This focused problem confounding with such variables as [oral A valid should vary only rhe extent subjects cluster basis experimenter-defined categories. If a can any characteristic recalled items, then interpretation experimental results remains dubious. current paper describes attempt develop affects clustering. stems from at least two sources. First, certain repetitions, i.e., contiguous occurrence