Subjects were required to discriminate previously learned "standard" versions of angular shapes from randomly perturbed "distrator" versions that varied in similarity to the standard. (Editor)

The rate of speaking in words per minute is a function of three independent variables, namely, articulation rate and the number and durations of pauses. The present study varies each of these components separately in a factorial design in order to determine how the listener combines them into a global impression of speech rate. (Editor)

Examines an alternation effect and a repetition effect in a two-choice reaction time task. Two further experiments examine the roles of subjective expectancy and an automatic facilitation in determining these effects. (Editor/RK)

Two new experimental operations were used to distinguish between auditory and phonetic levels of processing in speech perception: the first based on reaction time data in speeded classification tasks with synthetic speech stimuli, and the second based on average evoked potentials recorded concurrently in the same tasks. (Editor)

To investigate human visual identification of different-sized objects as identically shaped, matching reaction times were measured for pairs of simultaneously presented random figures. (Editor)

This article examined the effect of allocation of attention on adaptation to displacement when proprioception and vision conflict and considered whether more effective procedures to insure that attention is directed in the prescribed manner would cause adaptation to be confined strictly to the unattended modality. (Author/RK)

Studies employing schematic faces of three features explored the role of the left hemisphere as an analytic processor in difficult discriminations and the role of the right hemisphere in easy gestalt matches. (Editor)

Two experiments were designed to test a number of finite-state self-terminating memory-scanning models for choice reaction times. (Editor)

This paper reports some experimental evidence on the viability of the preliminary letter recognition hypothesis. (Author)

These experiments suggested that human subjects perceived velocity and acceleration directly and accurately. As well, they suggested that extrapolation of velocity is performed accurately through a direct extension of the movement that was seen. (Author/RK)

Attempts to provide empirical evidence for a functional correspondence between perception and imagination. Includes a perceptual-control condition in examining visual memory and imagery. (Author/RK)

Four experiments are reported investigating previous findings that speech perception interferes with concurrent verbal memory but difficult nonverbal perceptual tasks do not, to any great degree. (Editor)

From experiments showing that subjects differentially attend to parts of the visual field, psychologists have inferred a limitation on human visual information processing capacity. The model presented describes an optimal way to allocate a limited quantity of "cognitive resources", "attention" or "mental effort". An experiment tests this model.…

Examines the hypothesis that the identification of a briefly presented visual target is impeded by a patterned mask that immediately precedes and/or follows it. (Author/RK)

Measures the phenomenal and the functional durations of visual stimuli differing in informational value. (Author/RK)