A comparison of 28 mildly mentally retarded children with 28 children of average intelligence (mean mental age six years) in learning conservation skills found both groups benefited from Direct Instruction methods, but retarded children acquired only pseudoconservation from Observational Learning methods. Their learning was not tenacious and did…

Discussed are the results of interviews with 63 Australian children (interviewed in English) and 62 Nigerian children (62 interviewed in English and 60 interviewed in Yoruba) to determine how they used number concepts in discussing five demonstrations manipulating physical matter. Differences between the two groups are considered. (RH)

A longitudinal investigation on development of conservation skills in 31 learning disabled (LD) children suggested that delayed transition between preoperational and concrete operational thought may be an important factor in understanding the continued school failure of learning disabled children. (Author/CL)

Hypothesized that there would be no significant sex differences in the performance of conservation tasks on substance or volume, among 247 Ibo-speaking Nigerian children. Attributed confirmation of the hypothesis to social change and greater sexual equality in this developing society. (GC)

Studied 54 kindergarten children to investigate whether a common cognitive capacity underlies both homonym understanding and conservation status. Results indicated conservation status is significantly related to homonym understanding, over and above the rate of the child's general vocabulary level. (Author/CI)

Two experiments tested the assertion that development of quantitative knowledge follows a U-shaped course with an early stage of conservation based on functional significance. Tested three age groups of children from three to six years. Results suggest the assertion is unwarranted and reveal that performance in younger children is best interpreted…

Perceptual counterparts of a series of conservation of length tests were presented to subjects who were categorized as conservers or nonconservers conservation of length pre-tests, and to conservers and nonconservers given conservation length training. Perceptual performance of the untrained nonconservers was significantly worse than that of the…

Cadillac Desert is a four-part Public Broadcasting Service (PBS) video series on the remaking of America's West through startling feats of engineering and the consequences that this manipulation of water and nature has wrought. This guide is meant to serve as a resource for discussing the issues raised in the series. The first part of the guide…

Significant energy savings can be effected through stopping obvious waste of water, electricity, and heat; purchasing equipment with the correct voltage and horsepower; equipment maintenance; and redesigning or replacing obsolete or inefficient equipment. (Author/MF)

The huge oil corporations for many years have been using their political power at State, national, and international levels of government to control production and prices. (Author)

Open plan interiors in school design provide excellent opportunities for cutting costs by optimizing in construction and electric comfort conditioning. Important considerations to keep in mind when planning for the open concept. (Author)

Purpose of study was: (1) to obtain data in a cultural setting concerning the ability of children to conserve weight at the point of transition from primary to secondary education; and (2) to explore the relationship between performance or reasoning tasks of the kind employed in nonverbal psychometric tests and the presence or absence of ability…

The trend toward increased lighting has accelerated the acceptance of heat recovery systems. A heating-lighting-cooling system is a responsible and efficient use of energy for future school buildings. (Author/MLF)

On the basis of a conservation of substance experiment with 189 blind and partially sighted children, it is inferred that while the best of them are performing on a par with the best of their sighted peers, the age range in which conservation is attained is more extended for the visually handicapped. (Author)

In this study children between the ages of 3 and 6 years were each presented with six number problems in which length and density were varied according to the proposed composition rules. (Authors)