This study, which targeted students in Japanese universities, used a written questionnaire to examine student response behavior when their smartphones received a call or message during university lectures. Phone and message transmissions were taken as the transmission media and six types of caller/sender were set. Survey results showed differences in response behavior depending on the identity of the caller/sender. Additionally, the results showed a tendency for students to respond more to text messages during lectures. [For the full proceedings, see ED571335.]