Theoretical considerations indicating the effects of bereavement and orphanhood are offered to explain the relationship between achievement and parental loss as well as that between the genius and the disturbed psychotic. (Author)

This paper isolates various properties of theoretical models which are conducive to the successful fulfillment of the functions of theory in the progress of scientific research. Also examines two selected examples of models proposed in the psychological literature that illustrate their usefulness in furthering research. (Editor/RK)

In an effort to define literacy the authors list and discuss three routes: (1) Literacy defined by its opposite, (2) literacy defined by its properties, and (3) arriving at a definition, concluding that a definition depends upon the point of departure and the intended destination. (MF)

Two studies examined infants' understanding of spatial relations during the period following attainment of active search for hidden objects. (Author/SB)

A procedure for teaching concepts to elementary grade students includes the following four steps: (1) provide the definition and label; (2) present examples and nonexamples; (3) incorporate both instruction and practice; and (4) use a diagnostic classification test. (DB)

Examined and evaluated procedures for facilitating the development of relative thinking in retarded adults. (DP)

Reports five studies of children's attention to various characteristics or attributes relating to concept formation. (ST)

Originally given as the Giff Edmunds Memorial Lecture for 1967. (RS)

As analytic philosophy shows no sign of being abandoned or superseded in the English-speaking world, the prospects of continued conceptual clarification of nonphilosophical disciplines must be regarded as highly favorable at this point in time. (60 references) (Author/MM)

A group of 20 6-year-old children were examined to find out their concept of "flower" and the amount of detailed knowledge they possessed about flowers. Data was collected on the techniques teachers use to introduce such information. (AJ)

A review of Learning, Memory, and Conceptual Processes (New York: Wiley, 1970) by Walter Kintsch. (DB)