This research studied the relation between mastery of the words "and" and "or" and performance on the conjunctive and disjunctive tasks. A definition test was used to measure level of mastery of the linguistic terms and a traditional logical test to measure logical task performance. Results are related with ability to solve logical tasks.…

A broader approach to research in human development is proposed that focuses on the progressive accommodation, throughout the life span, between the growing human organism and the changing environments in which it actually lives and grows. The approach emphasizes the use of rigorously designed experiments, both naturalistic and contrived,…

Subjects learned lists of words under conditions of high, medium, or low expectations concerning test-phase cheating and were then tested for recall with cheating precluded. Test performance of subjects expecting to be able to cheat was unexpectedly better, rather than worse, than subjects with low expectations, even when cheating was precluded.…

It has been demonstrated that instructions to learn have no effect on immediate recall in the incidental learning paradigm used by Jenkins (1974). This research further investigated this finding by factorially manipulating recall instructions (incidental vs. intentional learning), presentation rate of materials, retention interval, and type of…

Studies the processing of pictures and words as symbols. Shows that the superiority of pictures results from the fact that pictures are interpreted more quickly than words, but that after the interpretation is made, processing is the same. Also gives evidence that pictures and words are both processed in terms of linguistic codes rather than…

Three experiments were conducted to evaluate the P300 component of the human evoked response as an index of bisensory information processing. Data shows that the P300 promises to be a valuable tool for assessing brain processes during complex decision making. (Editor/RK)

Two experiments investigated the relationship between social influence and the number of persons attempting influence. Findings suggest that the manner in which persons are initially organized into groups and aggregates of individuals affects their persuasive impact on observers. (Editor/RK)

Three experiments investigated the influence of positive and negative affect manipulations on children's preferences for small immediate versus large delayed rewards. (Editor)

Students are challenged to investigate a simple electric motor and to build their own model from a battery, wood block, clips, enameled copper wire, bare wire, and sandpaper. Through trial and error, several discoveries are made, including a substitute commutator and use of a radio to detect motor armature contact changes. (DH)

Presents activities and experiments that can be performed with mirrors to illustrate the nature and behavior of light. Includes diagrams, directives and investigative questions. (ML)

Discusses four different methods for measuring self-inductance based on the definition of inductance, the alternative definition, phase difference and LC resonance. Provides circuit diagrams and typical oscilloscope traces. (YP)

Describes a science activity designed for undergraduate biochemistry classes. Provides background, a list of materials, experimental procedures, and the results of this experiment. (CW)

Presents a practical exercise that enables students to measure flux control coefficients in a metabolic pathway in vitro, to verify the summation property, and to compare the differences in the distribution of these coefficients in different steady states. Discusses background, materials, methods, and results of the activity. (CW)

A discussion of issues related to direct practice and clinical dissertations in social work recommends experimental outcome studies that evaluate the efficacy of social work interventions and proposes a national research agenda for social work doctoral programs. (Author/MSE)

Considers the origins and development of the textbook view of causality and experiment by examining the various editions of Woodworth's PSYCHOLOGY (1921-1947). Examining the gradual emergence of the experiment-causality relationship, Winston contends that introductory textbooks oversimplify the concept of causality and he explores possible…