This paper reports on two experiments in mapping the affordances of mobile devices in supporting teaching and learning. The first argues for personally imagined rather than fixed affordances of educational technologies--what a technology "affords" is not static but is rather how an individual imagines a technology's use and how this is…

A descriptive analysis of research practices and a meta-analysis of control group effect sizes are used to address Hawthorne effects in educational experiments. The analysis of 86 studies and 256 treatment/Hawthorne/no-treatment control group effect size comparisons indicate that artifact controls have limited utility in dealing with the Hawthorne…

According to the ACT theory of skill acquisition, cognitive skills are encoded by a set of productions, which are organized according to a hierarchical goal structure. People solve problems in new domains by applying weak problem-solving procedures to declarative knowledge they have about this domain. From these initial problem solutions,…