A Wais Longitudinal Study of Cognitive Development During The Life Span From Ages 50 To 70

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A Wais Longitudinal Study of Cognitive Development During The Life Span From Ages 50 To 70. / Mortensen, Erik Lykke; Kleven, Mogens.

In: Developmental Neuropsychology, Vol. 9, No. 2, 01.04.1993, p. 115-130.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Mortensen, EL & Kleven, M 1993, 'A Wais Longitudinal Study of Cognitive Development During The Life Span From Ages 50 To 70', Developmental Neuropsychology, vol. 9, no. 2, pp. 115-130. https://doi.org/10.1080/87565649109540548

APA

Mortensen, E. L., & Kleven, M. (1993). A Wais Longitudinal Study of Cognitive Development During The Life Span From Ages 50 To 70. Developmental Neuropsychology, 9(2), 115-130. https://doi.org/10.1080/87565649109540548

Vancouver

Mortensen EL, Kleven M. A Wais Longitudinal Study of Cognitive Development During The Life Span From Ages 50 To 70. Developmental Neuropsychology. 1993 Apr 1;9(2):115-130. https://doi.org/10.1080/87565649109540548

Author

Mortensen, Erik Lykke ; Kleven, Mogens. / A Wais Longitudinal Study of Cognitive Development During The Life Span From Ages 50 To 70. In: Developmental Neuropsychology. 1993 ; Vol. 9, No. 2. pp. 115-130.

Bibtex

@article{81a4345d65194dc8969db419bb6bfac9,
title = "A Wais Longitudinal Study of Cognitive Development During The Life Span From Ages 50 To 70",
abstract = "A sample of 141 subjects born in 1914 was tested with the Wechsler Adult Intelligence Scale (WAIS) at the ages of 50, 60, and 70. Results showed a relatively moderate decline in test scores between successive examinations. For most subtests the decline was larger between 60 and 70 than between 50 and 60, and also larger for the Performance subtests than for the Verbal subtests (the total fall in Performance IQ was 7.2, and the total fall in Verbal IQ was 3.2). Seventy-three males showed a larger decline than 68 females in Performance and Full-Scale IQ, but the fall in test scores was not systematically related to educational background or initial IQ group. Further analysis provided evidence for a terminal drop hypothesis. The study demonstrated strikingly high retest stability of the WAIS IQ (a 20-year retest coefficient of 0.90 for the Full-Scale IQ).",
author = "Mortensen, {Erik Lykke} and Mogens Kleven",
year = "1993",
month = apr,
day = "1",
doi = "10.1080/87565649109540548",
language = "English",
volume = "9",
pages = "115--130",
journal = "Developmental Neuropsychology",
issn = "8756-5641",
publisher = "Psychology Press",
number = "2",

}

RIS

TY - JOUR

T1 - A Wais Longitudinal Study of Cognitive Development During The Life Span From Ages 50 To 70

AU - Mortensen, Erik Lykke

AU - Kleven, Mogens

PY - 1993/4/1

Y1 - 1993/4/1

N2 - A sample of 141 subjects born in 1914 was tested with the Wechsler Adult Intelligence Scale (WAIS) at the ages of 50, 60, and 70. Results showed a relatively moderate decline in test scores between successive examinations. For most subtests the decline was larger between 60 and 70 than between 50 and 60, and also larger for the Performance subtests than for the Verbal subtests (the total fall in Performance IQ was 7.2, and the total fall in Verbal IQ was 3.2). Seventy-three males showed a larger decline than 68 females in Performance and Full-Scale IQ, but the fall in test scores was not systematically related to educational background or initial IQ group. Further analysis provided evidence for a terminal drop hypothesis. The study demonstrated strikingly high retest stability of the WAIS IQ (a 20-year retest coefficient of 0.90 for the Full-Scale IQ).

AB - A sample of 141 subjects born in 1914 was tested with the Wechsler Adult Intelligence Scale (WAIS) at the ages of 50, 60, and 70. Results showed a relatively moderate decline in test scores between successive examinations. For most subtests the decline was larger between 60 and 70 than between 50 and 60, and also larger for the Performance subtests than for the Verbal subtests (the total fall in Performance IQ was 7.2, and the total fall in Verbal IQ was 3.2). Seventy-three males showed a larger decline than 68 females in Performance and Full-Scale IQ, but the fall in test scores was not systematically related to educational background or initial IQ group. Further analysis provided evidence for a terminal drop hypothesis. The study demonstrated strikingly high retest stability of the WAIS IQ (a 20-year retest coefficient of 0.90 for the Full-Scale IQ).

UR - http://www.scopus.com/inward/record.url?scp=0000874448&partnerID=8YFLogxK

U2 - 10.1080/87565649109540548

DO - 10.1080/87565649109540548

M3 - Journal article

AN - SCOPUS:0000874448

VL - 9

SP - 115

EP - 130

JO - Developmental Neuropsychology

JF - Developmental Neuropsychology

SN - 8756-5641

IS - 2

ER -

ID: 275901546