To estimate an attention level on the basis of microsaccade.SOLUTION: A model storage unit 10 stores information indicating a reference attention level and information indicating a decrease in an attention level. An eyeball information acquisition unit 11 acquires a dynamic change in an eye of a subject. A microsaccade detection unit 12 detects a time of occurrence of a microsaccade from the dynamic change in the eye. An estimation unit 13 estimates the attention level from the time of the occurrence of the microsaccade on the basis of the information indicating the reference attention level and the information indicating the decrease in the attention level.SELECTED DRAWING: Figure 2
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