Repeated Measurement of the Components of Attention of Older Adults using the Two Versions of the Attention Network Test: Stability, Isolability, Robustness, and Reliability

Ishigami, Yoko; Klein, Raymond M. · 2011 · OpenAlex-citations

DOI: 10.3389/fnagi.2011.00017

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Summary

This study investigates the stability, isolability, robustness, and reliability of attention network scores in older adults when measured repeatedly using two versions of the Attention Network Test (ANT and ANT-I). Motivated by the need to validate these tools for longitudinal studies and clinical interventions in aging populations, the researchers replicated a previous protocol used with young adults to determine if the three attentional components—alerting, orienting, and executive control—remain distinct and measurable over time in elderly participants. The experimental design involved ten older adults (mean age 69.1) who completed ten separate testing sessions, each containing both the original ANT and the modified ANT-I. In each session, participants performed tasks requiring them to identify the direction of a target arrow flanked by distractors, preceded by various auditory and visual cues. Network scores were calculated using orthogonal subtractions of reaction times (RT) and error rates across specific conditions. The researchers analyzed stability by examining changes in scores across sessions, robustness by testing if scores remained significantly different from zero, isolability by checking for interactions between networks, and reliability by computing correlations across increasing numbers of sessions. The results demonstrated that all three attention network scores remained robust across all ten sessions, meaning they stayed significantly different from zero despite observed practice effects. Specifically, RTs decreased over time, with notable improvements in alerting and executive network scores. However, the networks were not fully isolable; significant interactions between cue conditions and target congruency indicated some lack of independence among the networks. Furthermore, correlations in error rates suggested interactive operations among the networks. Reliability was a key finding: while single-session data yielded poor reliability, particularly for the executive network, reliability improved to respectable levels as more sessions were aggregated. For instance, the executive network required data from at least six sessions to achieve significant reliability in error rates, whereas the alerting network required fewer sessions. The significance of this research lies in establishing the psychometric properties of the ANT and ANT-I for older adults. The findings confirm that these tests provide robust measures of attentional networks even after repeated administration, making them suitable for longitudinal research and clinical assessments. However, the poor reliability of single-session data and the lack of complete isolability suggest that researchers must aggregate data from multiple sessions to obtain stable estimates and should interpret network scores with caution regarding their independence. This work supports the utility of the ANT in aging research while highlighting the necessity of repeated measures to ensure accurate assessment of attentional components in older populations.

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• cognitive capacity variation