With practice, keyboard shortcuts become faster than menu selection: A crossover interaction.

Abstract

It is widely believed that a graphical user interface (GUI) is superior to a command line interface (CLI) for novice users, but less efficient than the CLI after practice. However, there appears to be no detailed study of the crossover interaction that this implies. The rate of learning may shed light on the reluctance of experienced users to adopt keyboard shortcuts, even though, when mastered, shortcut use would reduce task completion times. We report 2 experiments examining changes in the efficiency of and preference for keyboard input versus GUI with practice. Experiment 1 had separate groups of subjects make speeded choice responses to words on a 20-item list either by clicking on a tab in a dropdown menu (GUI version) or by entering a preassigned keystroke combination (CLI version). The predicted crossover was observed after approximately 200 responses. Experiment 2 showed that following training all but 1 subject in the CLI-trained group chose to continue using shortcuts. These results suggest that frequency of shortcut use is a function of ease of retrieval, which develops over the course of multiple repetitions of the command. We discuss possible methods for promoting shortcut learning and the practical implications of our results.

Older adults’ use of mobile device: usability challenges while navigating various interfaces

“…Consistent with previous studies, this study confirmed that older adults have a major problem with using semantically distant or complex icons due to difficulties in building and applying accurate mental models between the graphical item and its operational meaning (Action 8,(19)(20)(21)(22)(23) (Leung, McGrenere, and Graf 2011;Remington, Yuen, and Pashler 2016). Specifically, most of the difficulties occurred when participants did not understand the graphical meaning of icons.…”

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