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Chris Chatham is a grad student at the University of Colorado, Boulder.

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December 31, 2007

Is Executive Function a Valid Construct?

Category: Cognitive Neuroscience

Originally posted on 12/16 2006: The term "executive function" is frequently used but infrequently defined. In attempting to experimentally define executive functions in terms of their relationship to age, reasoning and perceptual speed, Timothy Salthouse reviewed the variety of verbal...

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December 13, 2007

How The Brain Manages Conflict: Global and Local Conflict Adaptation Effects

Category: Cognitive Neuroscience

If you encounter a difficult situation, you may be extra careful afterwards, even in a different or unrelated situation. This intuitive statement has recently been confirmed in a laboratory task, and extended to show that such carry-over "conflict adaptation" effects...

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December 10, 2007

Dispute Over the Canonical Cortical Circuit: Structure-Function Dissociations in the Cortical Column

Category: Cognitive Neuroscience

Is there a basic "computational unit" of the neocortex? In contrast to subcortical regions, neocortical architecture seems fairly regular and matrix-like - leading to it's other name, "isocortex." While there are many contenders for the title of the "canonical circuit"...

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December 4, 2007

Memory in Moment-to-Moment Action: Reactive Control in Older Adults

Category: Cognitive Neuroscience

How does memory help to accomplish moment-to-moment goal-directed action? Classic accounts, such as Baddeley's working memory model, suggest that there are separate storage and processing ("executive") mechanisms, whereas newer accounts (proposed by a variety of researchers) propose that storage and...

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December 3, 2007

Does IQ Reflect Temporal Acuity?

Category: Cognitive Neuroscience

Your IQ can be reliably predicted by simple reaction time tasks - perhaps even more reliably than with much more complex cognitive tasks. This surprising psychometric fact has led to the belief in human "processing speed." In the same way...

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