A controlled experiment on the effects of forced delay between computer interactions. Twenty subjects of varying experience used JOSS in solving a planning problem. Twelve were locked out between trials --i.e., after receiving a current set of results. The experimental findings call into question some common beliefs about man-computer interaction. Subjects with a 5-min lockout did better work in less time and used less computer time than those with free access. An 8-min lockout proved disruptive, especially to experienced users. Other findings suggest that self-imposed restraint can also improve problem solving efficiency, that users' acceptance of the system is not necessarily a valid predictor of system effectiveness, and that users were inaccurate in recalling their problem solving behavior. There was also evidence that some online users felt pressured by the system to interact prematurely. These findings should aid in evaluating interactive systems. (See also R-520, R-573, R-584, RM-6132.) 54 pp. Ref.
This report is part of the RAND Corporation Report series. The report was a product of the RAND Corporation from 1948 to 1993 that represented the principal publication documenting and transmitting RAND's major research findings and final research.
Our mission to help improve policy and decisionmaking through research and analysis is enabled through our core values of quality and objectivity and our unwavering commitment to the highest level of integrity and ethical behavior. To help ensure our research and analysis are rigorous, objective, and nonpartisan, we subject our research publications to a robust and exacting quality-assurance process; avoid both the appearance and reality of financial and other conflicts of interest through staff training, project screening, and a policy of mandatory disclosure; and pursue transparency in our research engagements through our commitment to the open publication of our research findings and recommendations, disclosure of the source of funding of published research, and policies to ensure intellectual independence. For more information, visit www.rand.org/about/principles.
The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.