Three classes of conceptual bugs presenting obstacles to all novice programmers and not related to any specific program--parallelism, intentionality, and egocentrism--are identified and exemplified through student errors. It is suggested these bugs are rooted in students' intuitive feeling that programming languages, like humans, have intelligent,…

Critical examination of reviews of the literature on computer-assisted instruction (CAI) compares and evaluates three traditional and 13 quantitative reviews. Synthesis of the findings indicates that typical effect of CAI is to raise outcome measures by 0.42 standard deviation units, placing average students at 66th percentile of control group…