Article Dual device user interface design: PDAs and interactive television Share on Authors: Scott Robertson Applied Research, US WEST, Advanced Technologies, 4001 Discovery, Dr.Boulder, CO Applied Research, US WEST, Advanced Technologies, 4001 Discovery, Dr.Boulder, COView Profile , Cathleen Wharton Applied Research US WEST, Advanced Technologies, 4001 Discovery, Dr.Boulder, CO Applied Research US WEST, Advanced Technologies, 4001 Discovery, Dr.Boulder, COView Profile , Catherine Ashworth Applied Research US WEST, Advanced Technologies, 4001 Discovery, Dr.Boulder, CO Applied Research US WEST, Advanced Technologies, 4001 Discovery, Dr.Boulder, COView Profile , Marita Franzke Applied Research US WEST, Advanced Technologies, 4001 Discovery, Dr.Boulder, CO Applied Research US WEST, Advanced Technologies, 4001 Discovery, Dr.Boulder, COView Profile Authors Info & Claims CHI '96: Proceedings of the SIGCHI Conference on Human Factors in Computing SystemsApril 1996 Pages 79–86https://doi.org/10.1145/238386.238408Online:13 April 1996Publication History 75citation2,454DownloadsMetricsTotal Citations75Total Downloads2,454Last 12 Months34Last 6 weeks5 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteGet Access

This research investigates how several characteristics of display-based systems support or hinder the exploration and retention of the functions needed to perform tasks in a new application.In particular it is shown how the combination of the type of interface action, the number of interaction objects presented on the screen, and the quality of the label associated with these objects interact in supporting discovery and retention of the functionality embedded in those systems.An experiment is reported which provides empirical evidence for Polson & Lewis's CE+ theory of exploratory learning of computer systems [11].It also extends this theory and therefore leads to a refinement of the cognitive walkthrough procedure tllat was derived from it.The study uses an experimental method that combines observations from realistically complex task scenarios with a dek'liled analysis of ilie observed perfonnance.

The Cognitive Walkthrough methodology was developed in an effort to bring cognitive theory closer to practice; to enhance the design and evaluation of use interfaces in industrial settings. For the first time, small teams of professional developers have used this method to critique three complex software systems. In this paper we report evidence about how the methodology worked for these evaluations. We focus on five core issues: (1) task selection, coverage, and evaluation, (2) the process of doing a Cognitive Walkthrough, (3) requisite knowlege for the evaluators, (4) group walkthroughs, and (5) the interpretation of results. Our findings show that many variables can affect the success of the technique; we believe that if the Cognitive Walkthrough is ultimately to be successful in industrial settings, the method must be refined and augmented in a variety of ways.

INTRODUCTION Letting users speak commands to the systems they are interacting with has been tried in various domains. Examples include a range of computer applications, as well as more narrowly defined domains such as aircraft systems. Using speech to control computers has never caught on in a big way, however, and in aircraft it has been limited to a few special applications. Why? Isn’t it appealing to be able to simply say “justify” when doing word processing (instead of having to give that command through pressing a command key or making a selection from a menu)? Doesn’t it make a lot of sense to let a pilot concentrate her/his attention on the main job of flying instead of fumbling for the radio and manually setting it to the new frequency?