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Advances in Computer Vision and Pattern Recognition
We believe that every effectiveness evaluation should be replicated at least in order to verify the original results and to indicate evaluated e-learning system's advantages or disadvantages. This paper presents the methodology for conducting controlled experiment replication, as well as, results of a controlled experiment and an internal replication that investigated the effectiveness of intelligent authoring shell eXtended Tutor-Expert System (xTEx-Sys). The initial and the replicateddoi:10.1007/978-1-4471-6524-8_10 fatcat:zmat3qw5nvgzrbrd3lkpk35q2u