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In the course of the preparatory work for the WHO cross-cultural study on the neuropsychiatric aspects of HIV-I infection, two new neuropsychological tests (the WHO/UCLA Auditory Verbal Learning Test and the Color Trails 1 & 2) were developed. The evaluation of these tests was performed at four sites, two in developed and two in developing countries. The(More)
The present investigation examines the alternate-form and longitudinal reliability of two versions of the Auditory-Verbal Learning Test (AVLT) on a large, multiregional, healthy male sample. Subjects included 2,059 bisexual and homosexual HIV-seronegative males recruited from the Multicenter AIDS Cohort Study from centers in Baltimore, Chicago, Los Angeles,(More)
The present investigation examines specific aspects of frontal functioning across geriatric and nongeriatric cohorts. Subjects included 193 nongeriatric male pilots (mean age: 48.29 (SD = 6.79); mean education: 15.93 years (SD = 1.86)), and 68 geriatric males and females (mean age: 78.38 (SD = 5.07); mean education: 13.68 (SD = 2.53)). The results of a(More)
This study explores the presence of homogeneous subgroups among 156 normal elderly subjects based on their performance on a battery of neuropsychological tests. Subjects ranged in age between 57 and 85 years and included 62 males and 94 females with a mean age 70.7 years, mean education 14.1 years, and mean Full Scale IQ of 117.2. Six clusters were(More)
This study represents the first attempt to cross validate and report on the Neuropsychology Behavior and Affect Profile (NBAP) using closed head injury (CHI) participants. The NBAP is designed to measure emotional functioning before and following a brain event. Two CHI samples, differing primarily by method of ascertainment, were compared to a group of(More)
Recent studies of the relation between loudness and intensity difference limens (DLs) suggest that, if two tones of the same frequency are equally loud, they will have equal relative DLs [R. S. Schlauch and C.C. Wier, J. Speech Hear. Res. 30, 13-20 (1987); J.J. Zwislocki and H.N. Jordan, J. Acoust. Soc. Am. 79, 772-780 (1986)]. To test this hypothesis,(More)
The direct and indirect effects of demographic, medical, and psychological variables on neuropsychological performance in elderly individuals were examined using a LISREL structural equation model. One-hundred fifty-six geriatric subjects were individually administered a comprehensive neuropsychological battery, an extensive medical history and demographics(More)
The study explored differential patterns of deficits in different memory components as a function of dementia severity. Three groups of 58 subjects each were used: (1) highly functioning elderly who are free of neurological or psychiatric symptoms; (2) individuals with early signs of memory disturbance, whose MMSE scores were > or = 24; and (3) individuals(More)
This study explored the relationship between three indices of intersubtest scatter and level of cognitive deterioration in a sample of 104 patients with dementia of Alzheimer's type, who ranged in age between 52 and 84 years. Scatter was highly related to education and premorbid level of functioning. Advancement of dementia was shown to be associated with(More)