A head-mounted display (HMD) system includes an HMD device worn on a head of a user. The HMD device incorporates electroencephalography (EEG) interfaces for monitoring the brain of the human subject during interaction with the HMD device. Fluctuations in electrical potential that are observed via the EEG interfaces may be used to detect event-related potentials (ERPs). The HMD system may programmatically perform one or more operations in response to detecting ERPs.
User input validation and verification for augmented and mixed reality experiences