| 摘要 |
There are provided an attention-time measuring unit 4 that specifies an attention area from a user's visual line and measures an attention time T that is a time period during which the attention area is overlapping with a display area indicated by presentation information acquired by a presentation-information acquiring unit 3; a minimum recognition-necessary-time specifying unit 6 that specifies, from a type of a presentation object indicated in the presentation information, a minimum recognition-necessary time Tmin that is a minimum necessary time for recognizing the content of the presentation object; and a user's recognition-degree determination unit 7 that makes a comparison between the time T and the time Tmin, and determines from that comparison result, a recognition degree of the user for the presentation object; wherein a presentation-mode selecting unit 8 presents the presentation object in a presentation mode corresponding to the recognition degree determined by the determination unit 7. |
