Matti Munukka1, Kaisa Koivunen2, Mikaela von Bonsdorff2, Sarianna Sipilä2, Erja Portegijs2, Isto Ruoppila2, Taina Rantanen2. 1. Faculty of Sport and Health Sciences and Gerontology Research Center, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland. matti.munukka@jyu.fi. 2. Faculty of Sport and Health Sciences and Gerontology Research Center, University of Jyväskylä, P.O. Box 35, 40014, Jyväskylä, Finland.
Abstract
OBJECTIVE: To evaluate cohort differences in cognitive performance in older men and women born and assessed 28 years apart. METHODS: Data in this study were drawn from two age-homogeneous cohorts measured in the same laboratory using the same standardized cognitive performance tests. Participants in the first cohort were born in 1910 and 1914 and assessed in 1989-1990 (Evergreen project, n = 500). Participants in the second cohort were born in 1938 or 1939 and 1942 or 1943 and assessed in 2017-2018 (Evergreen II, n = 726). Participants in both cohorts were assessed at age 75 and 80 years and were recruited from the population register. Cognitive performance was measured using the Digit Span test from the Wechsler Memory Scale (WMS), Digit Symbol test from the Wechsler Adult Intelligence Scale (WAIS) and phonemic Verbal Fluency test from the Schaie-Thurstone Adult Mental Abilities Test. Reaction time assessing motor and mental responses was measured with a simple finger movement task, followed by a complex finger movement task. T-tests were used to study cohort differences and linear regression models to study possible factors underlying differences. RESULTS: We found statistically significant cohort differences in all the cognitive performance tests, except for the digit span test and simple movement task in men, the later-born cohort performing better in all the measured outcomes. CONCLUSIONS: The results of this study provide strong evidence that cognitive performance is better in more recent cohorts of older people compared to their counterparts measured 28 years earlier.
OBJECTIVE: To evaluate cohort differences in cognitive performance in older men and women born and assessed 28 years apart. METHODS: Data in this study were drawn from two age-homogeneous cohorts measured in the same laboratory using the same standardized cognitive performance tests. Participants in the first cohort were born in 1910 and 1914 and assessed in 1989-1990 (Evergreen project, n = 500). Participants in the second cohort were born in 1938 or 1939 and 1942 or 1943 and assessed in 2017-2018 (Evergreen II, n = 726). Participants in both cohorts were assessed at age 75 and 80 years and were recruited from the population register. Cognitive performance was measured using the Digit Span test from the Wechsler Memory Scale (WMS), Digit Symbol test from the Wechsler Adult Intelligence Scale (WAIS) and phonemic Verbal Fluency test from the Schaie-Thurstone Adult Mental Abilities Test. Reaction time assessing motor and mental responses was measured with a simple finger movement task, followed by a complex finger movement task. T-tests were used to study cohort differences and linear regression models to study possible factors underlying differences. RESULTS: We found statistically significant cohort differences in all the cognitive performance tests, except for the digit span test and simple movement task in men, the later-born cohort performing better in all the measured outcomes. CONCLUSIONS: The results of this study provide strong evidence that cognitive performance is better in more recent cohorts of older people compared to their counterparts measured 28 years earlier.
Entities:
Keywords:
Cognitive performance; Digit span test; Digit symbol test; Reaction time; Verbal fluency test
Authors: Denis Gerstorf; Gizem Hülür; Johanna Drewelies; Peter Eibich; Sandra Duezel; Ilja Demuth; Paolo Ghisletta; Elisabeth Steinhagen-Thiessen; Gert G Wagner; Ulman Lindenberger Journal: Psychol Aging Date: 2015-03-23