PROBLEM TO BE SOLVED: To evaluate a brain activity easily in an evaluation device for evaluating an extent of interest of an object person based on a brain activity.SOLUTION: An evaluation device 10 includes facial skin temperature acquisition means 20, brain activity estimation means 30, and evaluation means 200. The facial skin temperature acquisition means 20 acquires facial skin temperature data in a time-series manner. The facial skin temperature data include skin temperature data detected from the face of an object person, and position data on the detection region. The brain activity estimation means 30 estimates a brain activity of the object person based on a plurality of components acquired by breaking down the facial skin temperature data by singular value decomposition, principal component analysis or independent component analysis. The evaluation means 200 evaluates an extent of interest of the object person based on the brain activity of the object person estimated by the brain activity estimation means 30.SELECTED DRAWING: Figure 19
EVALUATION DEVICE, MARKET SURVEY DEVICE, AND LEARNING EVALUATION DEVICE