To evaluate the hypothesis that memories are related to operative levels, children were shown pictures involving seriation, horizontality, and verticality and were asked to reproduce them 1 week and 5 months later. Although memories and operative levels did correlate, the relations were quantitatively weak and were undermined by serious…

The purpose of this paper is to describe a new piece of apparatus for generating stimuli for what Michotte (1963) called 'the perception of causality'. (Author)

Rat received conditioning based upon a food unconditioned stimulus and then received manipulations designed to reduce the value of that food. The effects of these manipulations were assessed during extinction tests of the conditioned stimuli. (Editor/RK)

Three experiments are reported in which rats first received 50 escapable or inescapable signaled-shock trials. The results of the experiments are discussed in terms of a learned active-inactive predisposition to respond. (Editor/RK)

The effects of a visual distractor on vigilance task performance were examined in a sample of 35 learning disabled and 35 normal boys 8-12 years old. (Author/DB)

Forty infants, 3- to 12-months-old, participated in a study designed to differentiate the auditory response characteristics of normally developing infants in the age ranges 3 - 5 months, 6 - 8 months, and 9 - 12 months. (Author)

When stimuli differed on two dimensions (size and shape), either of which furnished enough information for a correct response, eight educable retarded adults were faster to discriminate than when stimuli differed only on dimension. (Author)

Suggests a way of using factor analytic techniques to supplement multidimensional scaling in such a way as to provide a firm basis for evaluating multidimensional representations. (Author/RC)

This experiment investigated the time course of recall (from 1/2 to 5 min.) for pictorial and verbal inputs. A hypermnesic (incremental recall) effect was found for pictures but not words, and was shown to be independent of multiple-recall trials. (Editor)

The present paper was an attempt to look upon word meaning as a process occurring within the individual's cognitive functioning. (Author/RK)

The objective of this investigation was two-fold; to examine systematically the importance of visual-holding cues during inter-response intervals, and to monitor concurrent visual behavior in an operant learning situation which incorporated a spatially displaced feedback locus. (Author)

Two experiments were carried out investigating the extent to which recognition responses to pictures are based on specific detail vs. general information. (Editor)