User performance effects with graphical icons and training for elderly novice users: A case study on automatic teller machines.

This study investigated the effects with training and graphical icons on task performance for elderly novice users on automatic teller machines (ATMs). 124 elderly novice users who had no prior ATM experience participated in the training and test of ATM usage. Participants in the control group (n = 62) were training to use the traditional text-based ATM interface meanwhile those in the experimental group (n = 62) were training to use the alternative ATM interface with graphical icons. They were asked to learn how to perform three major tasks of ATMs. A test immediately following the training and a test one month after training was carried out. Task completion score was used for measuring user performance. The results showed although training could help elderly novice users succeed in learning to use ATMs, they still had a significant decline in user performance in the test one month later compared with the immediate test. Participants of the experimental group outperformed those of the control group in both the immediate test and one month test after training, especially in the latter. The finding suggested graphical icons could help to improve the learning and retention of ATM usage for elderly novice users, especially the latter, which would compensate for the drawback of training and reduce forgetting rate to some extent. Well-designed graphical icons could benefit elderly novice users much from learning phase to retention phase. The findings of this study can be applied to guide the design and development of ATMs or other public technology devices considering elderly novice users.