Staff and Professors who may have experience in using similar system. The targeted user population range from novices who have not used any of similar system, users who have used similar system and experts. This population includes managerial cadre, sales persons, students, and faculty. The staff and professors who own similar systems can be considered as targeted users themselves. Experts refers to the users who have used the PDA for fairly long time.
Developers match the experts to a higher extent as they have extensive understanding of the system.
Back to Table of Contents 8.0 Possible confounding variables Confounding variable is a factor that is allowed to vary along with the treatment or independent variable. The independent variables in our system are the features of the PDA interface. Following are potential confounding variables with the resulting modification required in the experimental design. It is necessary to form the groups of these subjects such that their effect is successfully controlled. This can be done by first forming groups that have subjects with similar learnability metrics.