Materials. Materials consisted of categorized word lists. Items were taken from 18 categories from the updated version of the Battig and Montague (1969) word norms (Van Over- schelde, Rawson, & Dunlosky, 2004). Six items were drawn from each category. The first four items from each category were not used to help reduce the influence of guessing on the tests (Tulving & Pearlstone, 1966). The categories were divided into three sets of six categories, and each set was fully coun- terbalanced across the three conditions (overt retrieval, covert retrieval or no test). Subjects studied a list of 90 words, 18 categories with four, five, or six words per category. For each subject, the computer program randomly selected six categories for the four-word condition, six categories for the five-word condition, and six categories for the six-word condition, making certain that each of the three sets of categories contained two categories with four words, two with five words, and two with six words so that the total number of words assigned to each condition was equated. For the four- and five-word conditions, the computer randomly selected four or five words from the six words.
Materials. Materials consisted of categorized word lists. Items were taken from 18 categories from the updated version of the Battig and Montague (1969) word norms (Van Over- schelde, Rawson, & Dunlosky, 2004). Six items were drawn from each category. The first four items from each category were not used to help reduce the influence of guessing on the tests (Tulving & Pearlstone, 1966). The categories were divided into three sets of six categories, and each set was fully coun- terbalanced across the three conditions (overt retrieval, covert retrieval or no test). Subjects studied a list of 90 words, 18 categories with four, five, or six words per category. For each subject, the computer program randomly selected six categories for the four-word condition, six categories for the five-word condition, and six categories for the six-word condition, making certain that each of the three sets of categories contained two categories with four words, two with five words, and two with six words so that the total number of words assigned to each condition was equated. For the four- and five-word conditions, the computer randomly selected four or five words from the six words.
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