Table 5.

List of sensors and their respective domains and metrics.

Sensor	Metrics	Sense—Domain	Results	Reference
Altoida App	Digital biomarkers	Mild cognitive impairment (MCI) detection	AUC = 0.92	[79,80,81]
VR (Smart Aging Serious Game-SASG)	Cognitive health assessment	MCI and Vascular Cognitive Impairment (VCI) diagnosis	Diagnostic sensitivity and specificity (AUC > 0.80), Accuracy: 75–91%	[83,84]
VR (Virtual Supermarket Test) and Wearable EEG	EEG rhythms	Cognitive decline in MCI	Elevated EEG rhythms associated with cognitive tasks in VR	[85]
VR (Virtual Supermarket Test) and System Usability Scale (SUS)	Usability assessment	Usability and cognitive assessment accuracy	SUS score: 83.11/100, Correlation between SUS score and VST performance: r = −0.496	[86]