Patent ID: 8382483

Claim:
A service providing system comprising: an output section for presenting a question to a user, and further presenting sequentially a plurality of options as candidate answers to the question; a signal detection section for measuring an event-related potential of electroencephalograms of the user for each of the plurality of options in a predetermined period after each option is presented; a determination section for determining an option from among the plurality of options that the user has thought to be a correct answer, based on the event-related potentials in the predetermined period after each option is presented; a database storing a plurality of questions as well as options which are correct answers to the plurality of questions and options which are not the correct answers; and a selection section for, when the option which is determined by the determination section to have been thought to be the correct answer by the user corresponds to an option described as a correct answer option in the database, selecting a question of a genre different from that of the question presented by the output section, wherein the output section presents an option which is the correct answer in a first half of the presented plurality of options.