CAN-4, an advanced author language for CAI,computer-based testing and psychological experimentation: PDP-9 implementation

The effective use of computers for tutorial (programmed instruction) teaching and on-line testing requires that curriculum authors have powerful special-purpose languages. One such language, CAN-4, has been designed and implemented to run on the PDP-9. The language includes advanced scoring, data recording, computation, timing, and file control facilities. The language and its implementation are described in relation to the instructional problems which the facilities are designed to meet.     

THE STRUCTURE OF ABILITIES IN THE RETARDED

The ability structure in retarded women was studied on the same lines as with men (Kebbon, 1965). The women, 89 in number, were between 17 and 54, their IQ's between 40 and 90. Factor analysis was done of their scores on 16 tests measuring four factors—verbal, spatial-inductive, numerical and psychomotor. Comparison with the corresponding scores from 89 matched men and 92 normal men indicated that, in terms of these factors, retarded women have the same ability structure as retarded men, and that both have a similar structure to that of persons of average and superior intelligence.     

Infant recall memory and communication predicts later cognitive development

This longitudinal study investigates the relation between recall memory and communication in infancy and later cognitive development. Twenty-six typically developing Swedish children were tested during infancy for deferred imitation (memory), joint attention (JA), and requesting (nonverbal communication); they also were tested during childhood for language and cognitive competence. Results showed that infants with low performance on both deferred imitation at 9 months and joint attention at 14 months obtained a significantly lower score on a test of cognitive abilities at 4 years of age. This long-term prediction from preverbal infancy to childhood cognition is of interest both to developmental theory and to practice.