Abstract: A sightline-position determination device includes: a sightline-position input unit to which a position of a sightline of a user is inputted; a determination region setting unit which sets a determination region; a determination unit which determines whether or not the position of the sightline inputted from the sightline-position input unit falls within the determination region; and an output unit which outputs feedback to the user when the determination unit has determined that the position of the sightline falls within the determination region.

Abstract: A determination device includes an acquisition unit, a first determination unit, a second determination unit, and an output unit. The acquisition unit is configured to acquire a sightline direction of a user and a sightline direction of at least one facing person facing the user. The first determination unit is configured to determine whether a sightline of the user is directed to the facing person based on the sightline direction of the user acquired by the acquisition unit. The second determination unit is configured to determine whether a sightline of the facing person is directed to the user based on the sightline direction of the facing person acquired by the acquisition unit. The output unit is configured to output a feedback to the user and/or an executor based on a result of a determination of the first determination unit and a result of a determination of the second determination unit.