Usability Evaluation of Online Courses Service Platform Based on Extenics: Using "Machine Principle" Course as an Example

Abstract

In this paper, based on the usability evaluation system of online courses service platform, the content experience dimension is quantified by means of professional teachers' subjective scoring on the quality and arrangement of teaching content, and the interface experience dimension is quantified by means of performance measurement, the task completion of the subjects in the learning process is measured by making a series of learning tasks on the completion platform, the subjects who completed the performance measurement experiment were invited to participate in the self-report questionnaire survey, then the emotional experience dimension is quantified by means of self reporting measurement. On this basis, through the establishment of the matter element and the correlation function, an extension evaluation model of the service platform for online courses is developed based on Extenics. Using the quantitative data of each indicator as inputs, the proposed extension evaluation model is used to calculate the correlation degree of each indicator, and the usability of the service platform for online courses is evaluated. The result shows that the usability level of the service platform for online course which is using in Harbin Institute of Technology is in the third level, and it is at a medium level.