is the founder and President of UserWorks. Dr. Horst is an experimental psychologist and human factors engineer with extensive experience in applied behavioral research, systems development, and usability engineering. He founded UserWorks, as Man-Made Systems Corporation in September, 1989, and since then has been involved in all aspects of the company's technical work, business development, and management. Over the last several years, Dr. Horst's consulting activities have included usability testing of a variety of information technology products for clients such as ALPS Electric, Bell Atlantic Video Services, Inc., IBM, the IRS, NASA, Nynex Corporation, and Thomson Technology Consulting Group. He has also conducted heuristic usability evaluations (usability audits) for Century Computing (on a project for NASA), HOME Account Network, IBM, Lockheed Martin (on a project for the U.S. Dept. of Defense), the National Association of Securities Dealers, and Nynex. A recent project has involved the support of Quantum Research Corporation in planning an evaluation of NIH web sites and pilot testing evaluation methodologies. Dr. Horst has also supported the development of usability laboratories and testing procedures for the U.S. Census Bureau, Maryland Information Technology Center, and the IRS Document Processing Systems Development Center, and he led the development of a course on usability testing for the IRS. Over the last five years, Dr. Horst has worked closely with Norm Wilcox Associates in developing and marketing that organization's portable video data acquisition systems and ObServant observational data logging software.

Dr. Horst's other UserWorks' projects have also spanned a wide range of technologies and human factors concerns. These have included a market survey and human factors analysis of driver alertness monitors for a NHTSA-funded study of human factors issues in the design of in-vehicle, crash avoidance warning systems, the design and specification of enhancements to the COGSCREEN computerized cognitive test battery for the FAA, the integration of an electrophysiological data acquisition and analysis system for use in computerized performance evaluation, recommendations to a client for implementing eye tracker measures of usability, and support of a government intelligence agency research project investigating methods for studying the performance of image analysts.

Previously, as Director of Applied Behavioral Research at ARD Corporation, Dr. Horst developed and managed numerous contract R&D projects. These projects reflected his interests and background in physiological measures of performance. The products resulting from these efforts included proprietary data analysis software, a PC-based battery of cognitive tests, and specifications for a PC-based performance measurement workstation At ARD, Dr. Horst also conducted human factors reviews and analyses of user-computer interfaces, nuclear power process control rooms, computer graphic displays, and the training programs in a manufacturing plant. Other previous positions involved human electrophysiological research in several university laboratories. While conducting his dissertation research in the Cognitive Psychophysiology Lab at the University of Illinois, Dr. Horst participated in this research group's study of electrophysiological measures of human performance with applications to human engineering. He was responsible for laboratory studies of visual information processing, auditory signal detection, and computer-assisted instruction. He was also the Project Coordinator at the University of Maryland Medical School for a large study of "neurometrics," relating electrophysiological indices to children's psychometric performance and nutritional status.