White matter disruption is an important determinant of cognitive impairment after brain injury, but conventional neuroimaging underestimates its extent. In contrast, diffusion tensor imaging provides a validated and sensitive way of identifying the impact of axonal injury. The relationship between cognitive impairment after traumatic brain injury…

A longstanding and fundamental debate in developmental science is whether knowledge is acquired through domain-specific or domain-general mechanisms. To date, there exists no tool to determine whether experimental data support one theoretical approach or the other. In this article, we argue that the U- and N-shaped curves found in a number of…

Gestalt psychologists proposed two distinct learning mechanisms. Associative learning occurs gradually through the repeated co-occurrence of external stimuli or memories. Insight learning occurs suddenly when people discover new relationships within their prior knowledge as a result of reasoning or problem solving processes that re-organize or…

The time course of the spread of activation in lexical memory was studied using naming latency as the measure of activation in a variable-duration priming paradigm. (Editor)

Both acquisition and retention were better when the hierarchy was learned graphically rather than as a list of associations, although the effect was greater on acquisition than on retention. (Authors)

A rationale was developed for researching reading comprehension based on information gain. Previous definitions of comprehension which were reviewed included operational vs. nonoperational and skills vs. processes. Comprehension was viewed as an informational processing event which includes a constellation of cognitive and learning processes. Two…

The notion of strength is defined in several alternative ways for chains of associations connected in series and in parallel. Network strength theory is extended to handle retrieval dynamics for a network of associations, in a manner that permits various degrees of serial versus parallel manner that permits various degrees of serial versus…

Much recent cognitive and artificial intelligence research has focused on the development of "schema theory." This theory supposes the existence of knowledge and memory structures that encode prototypical descriptions of familiar concepts. Schema theory has developed in a scientific environment that stresses interdisciplinary approaches…