Accession Number : ADA292443

Title :   A Formative Evaluation of CU-SeeMe.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : Bibeau, Michael

PDF Url : ADA292443

Report Date : FEB 1995

Pagination or Media Count : 148

Abstract : CU-SeeMe is a video conferencing software package that was designed and programmed at Cornell University. The program works with the TCP/IP network protocol and allows two or more parties to conduct a real-time video conference with full audio support. In this paper we evaluate CU-SeeMe through the process of Formative Evaluation. We first perform a Critical Review of the software using a subset of the Smith and Mosier Guidelines for Human-Computer Interaction. Next, we empirically review the software interface through a series of benchmark tests that are derived directly from a set of scenarios. The scenarios attempt to model real world situations that might be encountered by an individual in the target user class. Designing benchmark tasks becomes a natural and straightforward process when they are derived from the scenario set. Empirical measures are taken for each task, including completion times and error counts. These measures are accompanied by critical incident analysis 2 7 13 which serves to identify problems with the interface and the cognitive roots of those problems. The critical incidents reported by participants are accompanied by explanations of what caused the problem and why This helps in the process of formulating solutions for observed usability problems. All the testing results are combined in the Appendix in an illustrated partial redesign of the CU-SeeMe Interface.

Descriptors :   *COMPUTER PROGRAMS, *VOICE COMMUNICATIONS, *CONFERENCING(COMMUNICATIONS), TEST AND EVALUATION, SCENARIOS, SYMPOSIA, MODELS, REAL TIME, INTERFACES, COUNTING METHODS, THESES, OPTICAL COMMUNICATIONS, ERRORS, STANDARDS, USER NEEDS, MAN COMPUTER INTERFACE, VIDEO SIGNALS, TARGET CLASSIFICATION, AUDIO TONES, VIDEO NETWORKS.

Subject Categories : Computer Programming and Software
      Radio Communications
      Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE