CAPTCHAs are difficult for humans to use, causing frustration. Alternatives have been proposed, but user studies equate usability to solvability. We consider the user perspective to include workload and context of use. We assess traditional text-based CAPTCHAs alongside PlayThru, a ‘gamified’ verification mechanism, and NoBot, which uses face biometrics. A total of 87 participants were tasked w...

This study examines the potential applications of the rational expectations hypothesis (REH) and adaptive learning theory in information technology (IT) investment and adoption decision-making. Although REH has been widely used in other areas of microeconomics and macroeconomics, we have not yet seen common use of the related theory in the Information Systems (IS) field. Despite the fact that r...

Besides the research results achieved it is the registrations of inventions and patents granted that are an important gauge of the competency of our institute. Also in the year 2004 IFW was able to continue its successful activities in this field. As at 31 December 2004 the institute can boast of a total of 135 patents registered within Germany and 109 patents granted abroad. In the year 2004 a...

Our research is part of an ongoing project to provide tools to support the individual learning needs of lifelong professional learners. In the advanced learning technology research community there is an increasing interest in personalizing learning technology according to the evolving knowledge needs of the learner and the changing knowledge within their profession. In this paper we propose an ...