Two methodological problems often arising in dyslexia research are considered. The first problem concerns the validity of experimental measures and the related problem of interpreting null results. The second problem involves the effects of sampling from a disabled population if the disorder under investigation has multiple unknown origins.…

Pigeons learned discrimination rapidly and responded differentially to pictures seen for the first time. The essential feature of a natural discrimination--which is the ability to cope with natural ranges of variation--was approached and earlier experimental results were extended using other classes of stimuli. (Author/RK)

Attempts to determine what effect, if any, a color's hue or value has on the elementary school child's perception of apparent weight. (Author/RK)

If a motive for cognitive consistency and the extravert's preference for the arousing and novel are opposing tendencies, one would predict that highly extraverted individuals will show less preference for states of cognitive consistency than those who are less extraverted. Two experiments test this prediction. (Author/RK)

The degree of relationship among measures of learning proficiency, cognitive development (following Piaget), school achievement in reading, mathematics, and spelling, and IQ among 79 low socioeconomic status black males attending the seventh grade in an inner-city school was examined. (Editor)

Focuses on the effect of verbal and pictorial stimuli on paired associate learning. The discussion centers on the traditional finding that learning is easier with pictures than with words as stimuli. Hypothesizes that this effect is caused by differential coding and storing strategies for words and pictures. (Editor/RK)

Piaget's theoretical position assumes that the ability to solve complete multiplication will be an earlier development in the child than partial multiplicative classification and his experimental findings support this hypothesis. The present experiment using 159 children aged 4:7 to 7:6 years re-examined the issue. (Editor/RK)

Deals with the relationship between attitudinal change and differences in environmental perception. (Author)

The validity of the Controlled Repression-Sensitization scale as an index of intellectualizing and repressive defenses was examined by a measure of affect cognition, which assesses the level of conceptualization and articulation of feelings in Ss' TAT stories. (Author/RK)

Investigates the locus of control expectancies and defensive styles of a group of Ss who might be expected to be overly internal, i. e., individuals with psychomatic disorders. (Author/RK)

Investigates a part of the typology presented by Jung, extraversion-introversion, as a possible contributor to a better understanding of the drug addicts' personality. (Author/RK)

Asks if current interference theory will also predict proactive inhibition in serial learning. Proactive inhibition is the result, at least in part, of a particular type of deficit in second-list learning. (Author/RK)

A lab study was conducted to test the effect of different kinds of instruction in copying tasks, which are considered to be a fundamental function in the area of psycho-motor skills. The study was organized as a two-way design with 24 eight-year-old Ss. (Editor)

Causal attributions of a person actually experiencing a success or failure (the actor) and someone who read about the situation (the observer) were compared. Results supported Jones and Nisbett (1971). (Editor)

Describes the initial attempt to develop a SPART, Self-Perceived Abilities Relevant in the Task, inventory, the results and discussion of that attempt including its predictive validity, and speculations on the practical and theoretical implications of the SPART construct and instrument. (Author/RK)