Modeling end-users' acceptance of a knowledge authoring tool.
OBJECTIVE
Knowledge bases comprise a vital component in the classic medical expert system model, yet the knowledge acquisition process by which they are created has been characterized as highly iterative and labor-intensive. The difficulty of this process underscores the importance of knowledge authoring tools that satisfy the demands of end-users. The authors hypothesize that the acceptability of a knowledge authoring tool for the creation of medical knowledge base content can be predicted by an accepted model in the information technology (IT) field, specifically the Technology Acceptance Model (TAM).


METHODS
An online survey was conducted amongst knowledge base authors who had previously established experience with the authoring tool software. The Likert-based questions in the survey were patterned directly after accepted TAM constructs with minor modifications to particularize them to the software being used. The results were analyzed using structural equation modeling.


RESULTS
The TAM performed well in predicting endusers' behavioral intentions to use the knowledge authoring tool. Five out of seven goodness-of-fit statistics indicate that the model represents the behavioral intentions of the authors well. All but one of the hypothesized relationships specified by the TAM were significant with p values less than 0.05.


CONCLUSIONS
The TAM provides an adequate means by which development teams can anticipate and better understand what aspects of a knowledge authoring tool are most important to their target audience. Further research involving other behavioral models and an expanded user base will be necessary to better understand the scope of issues that factor into acceptability.
Hulse
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Department of Biomedical Informatics, University of Utah, Salt Lake City, Utah, USA. nathan.hulse@intermountainmail.org
Del Fiol
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Rocha
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D001290:Attitude; D003625:Data Collection; D005103:Expert Systems; D006801:Humans; D051188:Knowledge Bases; D008490:Medical Informatics; D012984:Software; D014481:United States