Spontaneous transfer of learning is often difficult to elicit. This finding may be widespread partly because pretests proactively interfere with transfer. To test this hypothesis, 7-year-olds' transfer was examined across 2 numerical tasks (number line estimation and categorization) in which similar representational changes have been observed. As predicted, children given feedback on numerical ...

We report a study of a class of 28 sixth graders engaged in an extended computer-supported argumentive discourse activity. Participants collaborated with a same-side peer in arguing against successive pairs of peers on the opposing side of an issue. Meta-level awareness was facilitated by conducting the dialogs via instant messaging software, which made available a transcript of the dialog that...

Attention Deficit Hyperactivity Disorder (ADHD) is the most common neurobehavioural disorder of childhood. Although graphomotor deficits are not listed as a diagnostic criterion for ADHD, they are very common. It remains unclear, however, whether this is caused by motor deficits or by problems in planning and organizing behavior. The experimental group consisted of 30 boys with ADHD. The contro...

Creative insight and mystical union differ as to depth of withdrawal, which is a way of saying how closely they are bound to the phenomenal world. The difference between the creative and the mystical reflects disparities in the descent. The similarities reflect the common process through which descent is achieved. Neuropsychology is critical in revealing the imaginal undersurface of veridical o...

This is a first study that experimentally tested the basic premise of microgenetic theory: existence of recurrent stages of information processing in the brain. The application of Independent Component Analysis (ICA) to a substantial number of individual multi-channel ERPs in two variants of the cued GO/NOGO task enabled us to decompose the sensory-related ERP waves into four functionally disti...

This work uses microgenetic study of classroom learning to illuminate (1) the role of pre-instructional student knowledge in the construction of normative scientific knowledge, and (2) the learning mechanisms that drive change. Three enactments of an instructional sequence designed to lead to a scientific understanding of thermal equilibration are used as data sources. Only data from a scaffold...

This paper expands upon previous work of the authors in the field of fiber tracking in diffusion tensor (DT) fields acquired via magnetic resonance (MR) imaging. Specifically, we now focus on tuningup a previously developed probabilistic tracking algorithm by making use of a novel genetic algorithm which helps to optimize most of the adjustable parameters of the tracking algorithm. Since the ad...