Johnson et al. (A-14) note that the ability to identify the source of remembered information is a fundamental cognitive function. They conducted an experiment to explore the relative contribution of perceptual cues and cognitive operations information to age-related deficits in discriminating memories from different external sources (external source monitoring). Subjects for the experiment included 96 graduate and undergraduate students (41 males and 55 females) ranging in ages from 18 to 27 years. Among the data collected were the following performance recognition scores on source monitoring conditions (C1, C2, C3) and scores on the Benton Facial Recognition Test (C4), the Wechsler Adult Intelligence Scale—Revised (WAIS-R), WAIS-R Block Design subscale (C5), WAIS-R Vocabulary subscale (C6), the Benton Verbal Fluency Test (C7), and the Wisconsin Card Sorting Test (C8):

C1 C2 C3 C4 C5 C6 C7 C8 0.783 2.63 0.808 25 38 62 67 6 0.909 3.36 0.846   50  

0.920 2.14 0.616 23 25 53 47 6 0.727 3.36 0.846 25 40 49 58 6 0.737 2.93 0.731   59  

0.600 4.07 0.962 19 50 51 35 6 0.840 3.15 0.885   57  

0.850 3.06 0.769   55  

0.875 3.72 0.923 24 23 52 35 6