Validity and Reliability of Smartphone-Based Cognitive Assessment in Older Adults

Area of Science:

• Gerontology
• Cognitive Neuroscience
• Digital Health

Background:

• Cognitive decline in aging populations necessitates reliable assessment tools.
• Smartphone-based cognitive tasks offer potential for accessible and frequent cognitive monitoring.
• Evaluating the validity and reliability of these digital tools is crucial for their clinical adoption.

Purpose of the Study:

• To determine the validity and reliability of two smartphone-based cognitive tasks: Symbol Search Task (SST-SP) and Dot Memory Task (DMT-SP).
• To assess these tasks in cognitively healthy older adults.
• To compare smartphone task performance with established computer-based cognitive tests.

Main Methods:

• Sixty participants (32 older, 28 younger adults) completed two testing sessions.
• Participants performed computer-based (SST-PC, DMT-PC) and smartphone-based (SST-SP, DMT-SP) tasks, alongside standardized cognitive tests.
• Test-retest reliability was assessed using the smartphone tasks in a second session one week later.

Main Results:

• Strong correlations were found between smartphone and PC versions for both tasks (SST: r=0.83, DMT: r=0.86).
• Smartphone tasks showed moderate correlations with relevant standardized tests (SST-SP: r=0.50, DMT-SP: r=-0.47).
• SST-SP demonstrated good reliability; DMT-SP showed moderate reliability. Older adults performed lower than younger adults on both smartphone tasks.

Conclusions:

• The Symbol Search Task (smartphone) and Dot Memory Task (smartphone) are valid and reliable for assessing processing speed and working memory in older adults.
• These digital tools can be effectively utilized in research and clinical settings for cognitive assessment.
• Smartphone-based cognitive assessments offer a promising avenue for monitoring cognitive function in aging populations.