A communication terminal for communicating with a counterpart communication terminal includes a receiver that receives image data including an eye image of a user operating the counterpart communication terminal from the counterpart communication terminal, the eye image of the user being captured at the counterpart communication terminal while the user is viewing a predetermined position on a counterpart display and circuitry that specifies a sightline position indicating a sightline position of the user operating the counterpart communication terminal based on the received image data every time the image data is received by the receiver, determines a frequency of changes in the specified sightline position for a predetermined time period, and displays information indicating the frequency of changes in the specified sightline position on a display.
