• Knowledge acquisition and conceptual models: A Cognitive analysis of the interface

      Dillon, Andrew; Diaper, Dan; Winder, Russell (Cambridge: Cambridge University Press, 1987)
      This item is not the definitive copy. Please use the following citation when referencing this material: Dillon, A. (1987) Knowledge acquisition and conceptual models: a cognitive analysis of the interface. In: D. Diaper and R.Winder (eds.) People and Computers III. Cambridge: Cambridge University Press, 371-379. Abstract: Understanding how users process the information available to them through the computer interface can greatly enhance our abilities to design usable systems. This paper details the results of a longitudinal psychological experiment investigating the effect of interface style on user performance, knowledge acquisition and conceptual model development. Through the use of standard performance measures, interactive error scoring and protocol analysis techniques it becomes possible to identify crucial psychological factors in successful human computer use. Results indicate that a distinction between "deep" and "shallow" knowledge of system functioning can be drawn where both types of user appear to interact identically with the machine although significant differences in their respective knowledge exists. The effect of these differences on user ability to perform under stress and transfer to similar systems is noted. Implications for the design of usable systems are discussed.
    • Navigation in hypertext: A Critical review of the concept

      Dillon, Andrew; Richardson, John; McKnight, Cliff; Diaper, Dan; Gilmore, David J.; Cockton, Gilbert; Shackel, Brian (Amsterdam: North Holland, 1990)
      This item is not the definitive copy. Please use the following citation when referencing this material: Dillon, A., Richardson, J. and McKnight, C. (1990) Navigation in Hypertext: a critical review of the concept. In D.Diaper, D.Gilmore, G.Cockton and B.Shackel (eds.) Human-Computer Interaction-INTERACT'90. North Holland: Amsterdam, 587-592. Abstract: With the advent of hypertext it has become widely accepted that the departure from the so-called "linear" structure of paper increases the likelihood of readers or users becoming lost. In this paper we will discuss this aspect of hypertext in terms of its validity, the lessons to be learned from the psychology of navigation and the applicability of the navigation metaphor to the hypertext domain.
    • The Psychology of designer style

      Dillon, Andrew; Sweeney, Marian; Herring, Val; John, Phil; Fallon, Enda (DTI/IED Publications, 1988)
      This item is not the definitive copy. Please use the following citation when referencing this material: Dillon, A., Sweeney, M., Herring, V., John, P. and Fallon, E. (1988) The psychology of designer style. The Alvey Conference 1988. DTI/IED Publications, 323-327. 1. INTRODUCTION: Underlying the notion of style is a basic premise that all designers are not the same and that the manner in which any designer tackles a problem and proposes a solution may be qualitatively different from other designers. If this is shown to be the case and the concept of designer style can be meaningfully discussed then any model of the process of design should allow for such variation at the level of the group or individual. This basically describes the starting point of the HUSAT team's investigation of the concept.
    • A Survey of usability evaluation practices and requirements in the European IT industry

      Dillon, Andrew; Sweeney, Marian; Maguire, Martin; Alty, James L.; Guest, S.; Diaper, Dan (Cambridge: Cambridge University Press, 1993)
      This item is not the definitive copy. Please use the following citation when referencing this material: Dillon, A., Sweeney, M. and Maguire, M. (1993) A survey of usability evaluation practices and requirements in the European IT industry. In. J. Alty, S. Guest and D. Diaper (eds.) HCI'93. People and Computers VII. Cambridge: Cambridge University Press. Abstract: The present paper reports on a survey of current practices in usability engineering and requirements for support within European I.T. organisations. Responses were obtained from 84 individuals working in nine European countries. The data were analysed in terms of four themes: respondents' background, their interpretation and appreciation of the concept of usability, current practice with regard to usability evaluation, problems and requirements for support in conducting usability evaluation. Results suggest widespread awareness but only superficial application of Human Factors methods in Industry.