Investigates possible relations between the methods of quantification available to children and their performance on certain tasks requiring an understanding of number invariance. (Author/RK)

Investigates the effect of imagery ability upon performance in free recall and relates this effect to the distinction between primary and secondary memory. (Author/RK)

Most studies of memory emphasize the direct encoding of physical stimuli. In contrast, this research investigates memory for the internal stimuli that are generated during processing of a presented stimulus. (Editor)

Three experiments were conducted in which expectations of learning and transfer based on associative theory or frequency theory differed from those based on a theory of mental imagery. (Editor)

Three experiments were conducted to investigate whether semantic information presented to the unattended ear in a dichotic listening experiment has a memory effect after 30 seconds. (Editor)

In three experiments involving situations previously called upon in support of representativeness theory, questionnaire responses from 265 university students demonstrated systematic biases that deviated sharply from the obvious predictions of the theory. The implications for representativeness theory are discussed. (Editor/RK)

Scientific method marks the learning in a student flight center. (Editor)

Describes a physical chemistry experiment that uses dynamic nuclear magnetic resonance spectroscopy to determine the barrier to rotation in N,N-dimethylacetamide by measuring changes in line shapes as a function of temperature. (MLH)

Describes a kinetics experiment in which the student measures both a second-order rate constant and an overall third-order rate constant for the oxidation of benzoin to benzil in an alkaline medium. (MLH)

Examines the familiar serial to derived paired-associates transfer task in the light of expectations about the amount of positive transfer it should produce. Suggests, contrary to long-standing assumptions, that this paradigm cannot be expected to yield more than relatively moderate degrees of transfer because the utilization of response-produced…

Describes an experiment in which chemistry students determine the efficiency of a laboratory burner used to heat water. The reaction is assumed to be the complete combustion of methane, CH4. The experiment is appropriate for secondary school chemistry students familiar with heats of reaction and simple calorimetry. Contains pre-laboratory and…

Describes a laboratory exercise involving methylene blue and L-ascorbic acid in a simple clock reaction technique to illustrate the basic concepts of chemical kinetics. If stock solutions are supplied and each type of experiment takes no more than half an hour, the entire investigation can be completed in three practical sessions of three hours…

Explains the allium test in which roots are excised from onion bulblets grown in aqueous solutions of a test agent. Root tips are then isolated and stained with aceto-orcein, and chromosomal aberrations are microscopically observed. (Author/AIM)

Thermochromism is the reversible change of color of a solid when heated or cooled. Describes the preparation of thermochromic compounds that exhibit sharp thermochromic transitions. (DKM)