English, and presumably any natural language, contains a small group of expressions referring to species of things found in nature. These species are defined by their internal structure, determined by genetics in the case of living things and by chemical or physical properties in the case of others. The reference of these terms is determined by…

In a recent study of conceptual combination, Estes (2003) presented evidence for the priming of relational information in the absence of shared constituents between the prime and target (e.g., "pancake spatula" was interpreted more quickly following "bacon tongs" than following "city riots"). He argued that these data support the view that…

Two kinds of perspectives governing the provision and preservation of knowledge, a universal and an ecological perspective, are discussed in this paper. In the first case, scientific observations are represented through a semantic interpretation of facts. This is illustrated with a series of experiments on semantic feature perception in the recall…

This article examines the concept of distributed leadership, drawing from a systematic review of relevant literature commissioned by the National College for School Leadership (NCSL) and jointly funded by NCSL and the Open University's Centre for Educational Policy, Leadership and Lifelong Learning (CEPoLL). The concept attracts a range of…

The paper explores origins of and behavioral science influences on three educational slogans: (1) structure, (2) learning by discovery, and (3) any subject can be taught. These slogans can be traced through four stages. Stage I consisted of practical reform projects of the early 1950s. These projects were marked by a wish to strengthen content and…