Experiments of displaying images to keep the motivation in e-learning. - Masakazu Takeue; Kazutoshi Shimada; Kenichi Takahashi; Michimasa Inaba (SMC, 2012)

Effects of Images Displayed for Praising or Scolding on Motivation in E-Learning. - Masakazu Takeue; Kenichi Takahashi; Michimasa Inaba (SMC, 2013)

Experiments on images displayed for praising and scolding in e-learning systems. - Kenichi Takahashi; Masakazu Takeue; Michimasa Inaba (IMCOM, 2017)