Biostatistics

REVIEW QUESTIONS AND EXERCISES 533
Alzheimer’s Disease Subjects
Controls
C1 C2 C3 C4 C5 C6 C1 C2 C3 C4 C5 C6
73 69 48 75 400.00 44610 70
97 419.00 53175
87 83 48 39 565.00 63855 81
93 470.00 54285
60 54 72 67 307.00 31110 82
93 417.00 47160
62 57 60 64 335.00 36000 57
101 215.00 27120
75 70 48 51 352.00 44760 87
91 244.00 23895
63 60 24 79 426.00 47250 88
88 355.00 33565
81 77 48 51 413.00 51825 87
91 392.00 42810
66 64 24 61 402.00 41745 70
100 354.00 45105
78 73 60 32 518.00 66030 63
103 457.00 48765
72 64 72 61 505.00 49905 87
81 323.00 39360
69 65 48 73 427.00 55350 73
94 386.00 48150
76 73 36 63 409.00 51960 87
91 244.00 25830
46 41 60 73 333.00 33030 58
103 353.00 42060
77 75 18 63 591.00 73125 85
93 335.00 37425
64 61 36 59 559.00 60750 58
99 470.00 55140
72 69 30 47 511.00 54945 67
100 346.00 50745
68
100 262.00 28440
62
93 271.00 23595
¼ Not applicable.
Source: Data provided courtesy of Dr. John T. O’Brien.
19. 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
(Continued )