Evidence map›Paper›PMID 21859179›Full record

ArticlePsychological bulletin2011

Only time will tell: cross-sectional studies offer no solution to the age-brain-cognition triangle: comment on Salthouse (2011).

Naftali Raz, Ulman Lindenberger

Abstract readComment
In one paragraph

Article in Psychological bulletin, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 106 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
106citing papers in PubMed, 2 pooled it
3.8field-weighted citation impact, top 6% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

106 citing papers in PubMed, 2 syntheses or guidelines pooled it, 199 citations in OpenAlex.

  1. Pooled it
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  11. Cognitive dedifferentiation in later life: longitudinal findings from the Lothian Birth Cohort 1936.The journals of gerontology. Series B, Psychological sciences and social sciences · 2026
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  17. Developmental Changes in Brain Cellular Membrane and Energy Metabolism: A Multi-occasionThe Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
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46 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

2 authors at 2 institutions in 2 countries.

Naftali RazInstitute of Gerontology and Department of Psychology, Wayne State University, 87 East Ferry Street, Detroit, MI 48202, USA. nraz@wayne.edu
Ulman Lindenberger
Max Planck Society · DEWayne State University · US

Funding

Neural Correlates and Modifiers of Cognitive AgingR37AG011230 · NIA · WAYNE STATE UNIVERSITY · PI RAZ, NAFTALI · 2005 to 2014
$5.2M
NEURAL CORRELATES OF AGE-RELATED DIFFERENCES IN MEMORYR01AG011230 · NIA · WAYNE STATE UNIVERSITY · PI DAUGHERTY, ANA MARIE, RAZ, NAFTALI · 1993 to 2020
$4.8M
NIA NIH HHS R01 AG011230NIA NIH HHS R37 AG011230NIA NIH HHS R37-AG-11230
6 · The paper itself

Abstract

Salthouse (2011) critically reviewed cross-sectional and longitudinal relations among adult age, brain structure, and cognition (ABC) and identified problems in interpretation of the extant literature. His review, however, missed several important points. First, there is enough disparity among the measures of brain structure and cognitive performance to question the uniformity of B and C vertices of the ABC triangle. Second, age differences and age changes in brain and cognition are often nonlinear. Third, variances and correlations among measures of brain and cognition frequently vary with age. Fourth, cross-sectional comparisons among competing models of ABC associations cannot disambiguate competing hypotheses about the structure and the range of directed and reciprocal relations between changes in brain and behavior. We offer the following conclusions, based on these observations. First, individual differences among younger adults are not useful for understanding the aging of brain and behavior. Second, only multivariate longitudinal studies, age-comparative experimental interventions, and a combination of the two will deliver us from the predicaments of the ABC triangle described by Salthouse. Mediation models of cross-sectional data represent age-related differences in target variables but fail to approximate time-dependent relations; thus, they do not elucidate the dimensions and dynamics of cognitive aging.

Indexed as

AgingBrainCognition DisordersHumans

Identifiers

PMID21859179
PMCPMC3160731
OpenAlexW2061426577

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.