This dissertation describes an experiment to investigate how learners with different levels of background in computer science learn core concepts of computer science, in particular, algorithms. We designed a study to focus on cognitive task analysis for eliciting the empirical mental elements of learning two graph algorithms. Cognitive workload…

Introduction: Under the influence of Vygotsky, dynamic assessment (DA) has recently crept into the realm of L2 testing to assess learners' cognitive modification through the concept of mediation and zone of proximal development (ZPD) (Ableeva, The Effects of Dynamic Assessment on L2 Listening Comprehension 2008; Lantolf, Sociocultural theory and…

On belief-desire reasoning tasks, children first pass tasks involving true belief before those involving false belief, and tasks involving positive desire before those involving negative desire. The current study examined belief-desire reasoning in participants old enough to pass all such tasks. Eighty-three 6- to 11-year-olds and 20 adult…

The design and architecture of two user-controlled, computer-based problem analysis environments in classical mechanics are discussed. In the expert-like environment, the user analyzes problems according to a hierarchical concept schema consistent with how experts analyze novel problems in physics. In the second environment, the user searches a…