Estimation device, estimation method, and estimation program

An estimation method executed by an estimation device, the estimation method comprising:

• acquiring a pupil diameter of a subject whose work performance is to be estimated at a time of work and a luminance of a gaze target of the subject;
• calculating a variation amount of the pupil diameter of the subject from time-series data of the pupil diameter of the subject;
• determining whether or not the luminance of the gaze target of the subject is equal to or higher than a predetermined value;
• and
• determining that a correlation between a magnitude of the variation amount of the pupil diameter of the subject and a deterioration in the work performance of the subject is low in a case where it is determined that the luminance of the gaze target of the subject is equal to or higher than a predetermined threshold, determining that the correlation between the magnitude of the variation amount of the pupil diameter of the subject and the deterioration in the work performance of the subject is high in a case where it is determined that the luminance of the gaze target of the subject is lower than the predetermined threshold, and estimating the work performance of the subject based on a result of the determination and the variation amount of the pupil diameter of the subject.

A non-transitory computer-readable recording medium storing therein an estimation program that causes a computer to execute a process comprising:

• acquiring a pupil diameter of a subject whose work performance is to be estimated at a time of work and a luminance of a gaze target of the subject;
• calculating a variation amount of the pupil diameter of the subject from time-series data of the pupil diameter of the subject;
• determining whether or not the luminance of the gaze target of the subject is equal to or higher than a predetermined value;
• and
• determining that a correlation between a magnitude of the variation amount of the pupil diameter of the subject and a deterioration in the work performance of the subject is low in a case where it is determined that the luminance of the gaze target of the subject is equal to or higher than a predetermined threshold, determining that the correlation between the magnitude of the variation amount of the pupil diameter of the subject and the deterioration in the work performance of the subject is high in a case where it is determined that the luminance of the gaze target of the subject is lower than the predetermined threshold, and estimating the work performance of the subject based on a result of the determination and the variation amount of the pupil diameter of the subject.