Method and apparatus for sending a message to a subject

1. A method of sending a message to a subject, the method comprising:

obtaining measurements of one or more physiological characteristics of a subject,

wherein the measurements are taken over a first plurality of time periods;

determining a psychological state of the subject during each of the first plurality of time periods; and

determining that the subject is in a psychological state of interest in a first time period,

determining that the subject is not in the psychological state of interest in a second time period subsequent to the first time period, and

automatically sending a message to the subject in the second time period,

wherein the message requests that the subject identify an emotion state of the subject in the first time period.

2. The method as in claim 1 , wherein the method further comprises:

determining baseline values of measurements of the one or more physiological characteristics associated with a baseline psychological state,

wherein the determining of the baseline values comprises:

comparing a current set of the measurements of the one or more physiological characteristics to the baseline values; and

determining that the subject is in a psychological state of interest if the current set of measurements of the one or more physiological characteristics deviate from the baseline values.

3. The method as in claim 2 , comprising determining that the subject is in a psychological state of interest if the current set of measurements deviate from the baseline values by more than a predetermined amount.

4. The method as in claim 2 , comprising determining that the subject is in a psychological state of interest if the current set of measurements deviate from the baseline values for longer than a predetermined minimum amount of time.

5. The method as in claim 1 further comprising:

obtaining movement measurements of the movements of the subject over a second plurality of time periods;

obtaining environmental measurements of one or more environmental parameters over a third plurality of time periods; and

determining the psychological state of the subject for each of the second plurality of time periods and each of the third plurality of time periods.

6. The method as in claim 5 , wherein the determining the psychological state of the subject comprises determining that the subject is not in a psychological state of interest if at least one of the movement measurements or the environmental measurements indicate that the subject is performing a physical activity.

7. The method as in claim 5 , wherein the determining the psychological state of the subject comprises determining that the subject is not in a psychological state of interest if at least one of the movement measurements or the environmental measurements indicate that the subject is physically stressed due to environmental factors.

8. A non-transitory computer readable medium comprising computer readable code, wherein the computer readable code is configured such that, on execution by a suitable computer or processor, the computer or processor is caused to perform the method of claim 1 .

9. An apparatus for sending a message to a subject, the apparatus comprising:

a processing circuit, the processing circuit configured to:

obtain measurements of one or more physiological characteristics of a subject,

wherein the measurements are taken over a first plurality of time periods;

determine a psychological state of the subject during each of the first plurality of time periods;

determine that the subject is in a psychological state of interest in a first time period;

determine that the subject is not in the psychological state of interest in a second time period subsequent to the first time period; and

automatically send a message to the subject in a second time period;

wherein the message requests that the subject identify an emotional state of the subject in the first time period.

10. The apparatus as in claim 9 , wherein the processing circuit is further configured to:

determine baseline values of measurements of the one or more physiological characteristics associated with a baseline psychological state,

wherein the processing circuit is configured to determine a psychological state of the subject by:

comparing a current set of the measurements of the one or more physiological characteristics to the baseline values; and

determining that the subject is in a psychological state of interest if the current set of measurements of the one or more physiological characteristics deviate from the baseline values.

11. The apparatus as in claim 9 , wherein the processing circuit is further configured to:

obtain movement measurements of the movements of the subject over a second plurality of time periods; and

obtaining environmental measurements of one or more environmental parameters over a third plurality of time periods,

wherein the processing circuit is configured to determine a psychological state of the subject by determining the psychological state of the subject for each of the second plurality of time periods and each of the third plurality of time periods.

12. The apparatus as in claim 11 , wherein the processing circuit is configured to determine the psychological state of the subject by determining that the subject is not in a psychological state of interest if at least one of the movement measurements or the environmental measurements indicate that the subject is performing a physical activity.

13. The apparatus as in claim 9 , wherein the apparatus further comprises a physiological characteristic sensor for measuring one or more physiological characteristics of the subject over time.

14. The apparatus as in claim 11 , wherein the processing circuit is configured to determine the psychological state of the subject by determining that the subject is not in a psychological state of interest if at least one of the movement measurements or the environmental measurements indicate that the subject is physically stressed due to environmental factors.

15. The apparatus of claim 9 , wherein the processing circuit is configured to:

store a record of the psychological state of the subject;

receive a response to the message from the subject; and

annotate the record based on the response.

16. The method of claim 1 , comprising:

storing a record of the psychological state of the subject;

receiving a response to the message from the subject; and

annotating the record based on the response.