Method and system for monitoring stress conditions
First Claim
1. A computer-implemented method of assessing a mental state of a subject, the method comprising:
- receiving, as input, a heartbeat record of the subject, which comprises a sequence of heartbeat data samples obtained over a time span which includes a pre-sleep period, a sleep period having a sleep onset time and a sleep conclusion time, and a post-sleep period;
identifying, within the heartbeat record, at least the sleep onset time and the sleep conclusion time;
accessing a knowledge base comprising data obtained via expert evaluation of a training set of subjects and embodying a computational model of a relationship between mental state and heart rate characteristics;
using information in the knowledge base, applying the computational model to a computed at least one metric associated with the mental state of the subject, to generate an indication of mental state based upon the metric, wherein the knowledge base comprises a template heart rate characteristic obtained by averaging scaled and normalised heart rate characteristics of subjects in the training set who have been assessed by an expert assessor as experiencing normal or low levels of stress; and
providing, as output, the indication of mental state.
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Abstract
A computer-implemented method of assessing a stress condition of a subject (106) includes receiving (302), as input, a heartbeat record (200) of the subject. The heartbeat record comprises a sequence of heartbeat data samples obtained over a time span which includes a pre-sleep period (208), a sleep period (209) having a sleep onset time (224) and a sleep conclusion time (226), and a post-sleep period (210). At least the sleep onset time and the sleep conclusion time are identified (304) within the heartbeat record. A knowledge base (124) is then accessed (306), which comprises data obtained via expert evaluation of a training set of subjects and which embodies a computational model of a relationship between stress condition and heart rate characteristics. Using information in the knowledge base, the computational model is applied (308) to compute at least one metric associated with the stress condition of the subject, and to generate an indication of stress condition based upon the metric. The indication of stress condition is provided (310) as output.
110 Citations
18 Claims
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1. A computer-implemented method of assessing a mental state of a subject, the method comprising:
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receiving, as input, a heartbeat record of the subject, which comprises a sequence of heartbeat data samples obtained over a time span which includes a pre-sleep period, a sleep period having a sleep onset time and a sleep conclusion time, and a post-sleep period;
identifying, within the heartbeat record, at least the sleep onset time and the sleep conclusion time;accessing a knowledge base comprising data obtained via expert evaluation of a training set of subjects and embodying a computational model of a relationship between mental state and heart rate characteristics; using information in the knowledge base, applying the computational model to a computed at least one metric associated with the mental state of the subject, to generate an indication of mental state based upon the metric, wherein the knowledge base comprises a template heart rate characteristic obtained by averaging scaled and normalised heart rate characteristics of subjects in the training set who have been assessed by an expert assessor as experiencing normal or low levels of stress; and providing, as output, the indication of mental state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A computer-implemented system for assessing a mental state of a subject, the system comprising:
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at least one microprocessor; at least one non-volatile storage device containing a knowledge base comprising data obtained via expert evaluation of a training set of subjects and embodying a computational model of a relationship between mental state and heart rate characteristics; at least one computer-readable memory device operatively associated with the microprocessor; and an input/output interface operatively associated with the microprocessor, wherein the memory device contains computer-executable instruction code which, when executed via the microprocessor, causes the microprocessor to effect a method comprising steps of; receiving, via the input/output interface, a heartbeat record of the subject, which comprises a sequence of heartbeat data samples obtained over a timespan which includes a pre-sleep period, a sleep period having a sleep onset time and a sleep conclusion time, and a post-sleep period; identifying, within the heartbeat record, at least the sleep onset time and the sleep conclusion time; using information in the knowledge base, applying the computational model to a computed at least one metric associated with the mental state of the subject to generate an indication of mental state based upon the metric, wherein the knowledge base comprises a template heart rate characteristic obtained by averaging scaled and normalised heart rate characteristics of subjects in the training set who have been assessed by an expert assessor as experiencing normal or low levels of stress; and providing, via the input/output interface, the indication of the mental state of the subject. - View Dependent Claims (16, 17, 18)
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Specification