1. A computer-implemented means for assessing brain health of a person based on the person's use of one or more electronic devices, wherein the computer-implemented means comprises a processing means, and wherein: a. the computer-implemented means receives inputs from a data collection module installed at the one or more electronic devices, the inputs received at the computer-implemented means comprising the processing means executing instructions for learning a function mapping, the inputs associated with one or more interactions of the person with the one or more electronic devices, the inputs recorded by the data collection module without requiring additional actions by the person while the inputs are recorded; b. computing, by the computer-implemented means, a brain health metric by learning the function mapping from the inputs to the brain health metric, wherein the brain health metric is a percentile rank relative to a population of users, the brain health metric indicating the person's likelihood of being in at least one of a cognitive state and a neuropsychological state; and c. outputting, by the computer-implemented means, the brain health metric.
7. The computer-implemented means of claim 1 , wherein to quantify an effect on the person's brain health of at least one of social interaction, mobility, physiology, cognitive stimulation, behavioral therapy, diet, medication taken and traumatic exposure, the method further comprises the steps of: a. recording at the one or more electronic devices inputs associated with a measurement of at least one of social interaction, mobility, physiology, cognitive stimulation, behavioral therapy, diet, medication taken and traumatic exposure; b. learning a measurement function mapping from said inputs associated with the measurement to the brain health metric; and c. outputting an attribution to the brain health metric that is explained by the inputs associated with the measurement.