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Reliability and Validity

Reliability and Validity

Reliability and validity are two important considerations that must be made with any type of data collection. Reliability refers to the ability to consistently produce a given result. In the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways.

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Development of a Virtual Reality Assessment of Everyday Living Skills

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Reliability of remote self-administered digital cognitive assessments: preliminary validation study.

Duong Huynh¹, Siao Ye¹, Reza Hosseini Ghomi^1,2

¹Department of Clinical Development, BrainCheck Inc., Austin, TX, United States.

Frontiers in Digital Health

|July 18, 2025

Summary

Remote digital cognitive assessments (DCAs) using the BrainCheck platform show reliable results when self-administered. This validates BrainCheck for accessible cognitive impairment screening, overcoming healthcare access barriers.

Keywords:

BrainCheck dementia diagnosis digital cognitive assessment reliability self-administered testing

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Area of Science:

Neuroscience
Digital Health
Gerontology

Background:

Early diagnosis of cognitive impairment and dementia is crucial but often hindered by limited access to healthcare services and skilled providers.
Digital cognitive assessments (DCAs) offer a promising solution for remote and cost-effective cognitive evaluations.
Challenges in accessing traditional in-person cognitive assessments disproportionately affect individuals in underserved areas or facing socioeconomic hardships.

Purpose of the Study:

To validate the reliability of the BrainCheck platform for digital cognitive assessments when self-administered remotely.
To assess the feasibility of using BrainCheck for cognitive evaluations outside of a clinical setting.

Main Methods:

46 participants (aged 52-76) remotely completed a battery of six BrainCheck cognitive assessments twice.
Assessments were performed once self-administered and once by a research coordinator (RC) on the same device.
Inter-session intervals varied, and testing outcomes were compared between self- and RC-administered sessions.

Main Results:

Moderate to good agreement (intraclass correlation 0.59-0.83) was observed between self- and RC-administered cognitive assessments.
Mixed-effects modeling revealed no significant differences in performance based on self- vs. RC-administration.
Performance consistency was independent of testing order, inter-session interval, device used, or participant demographics.

Conclusions:

The BrainCheck platform demonstrates feasibility for reliable remote self-administration of cognitive assessments.
These findings support the use of BrainCheck as an accessible tool for cognitive screening, potentially improving early diagnosis of cognitive impairment and dementia.