Inhibition of return (IOR) is modulated by task set and appears later in discrimination tasks than in detection tasks. Several hypotheses have been suggested to account for this difference. We tested three of these hypotheses in two experiments by examining the influence of cue and target level of processing on the onset of IOR. In the first…

Psychological research has placed great emphasis on inhibitory control due to its integral role in normal cognition and clinical disorders. The stop-signal task and associated measure--stop-signal reaction time (SSRT)--provides a well-established paradigm for measuring response inhibition. However, motivational influences on stop-signal…

Using a continuous tracking task, the authors examined whether stopping is resistant to expectancies as well as whether it is a representative measure of response control. Participants controlled the speed of a moving marker by continuously adjusting their response force. Participants stopped their ongoing tracking in response to auditory signals…

In order to examine the degree to which form perception affects the formation of apparent-motion experience, subjects were presented with nine ambiguous apparent-motion situations, where the elements of each single flash were various figures. (Editor)

The purpose of the present work was to investigate the relation between pattern goodness and accuracy of reproduction in backward masking. It may be hypothesized that good patterns, being easier to encode as wholes, will be reproduced more easily than poorer patterns. Four experiments were performed. (Author)

The purpose of the present experiment was to compare auditory with visual perception of rhythmic temporal patterns. (Author)

This study investigates detrimental perceptual effects of adding extraneous stimuli to a tachistoscopic pattern. In two experiments, a general inhibitory effect on reproduction accuracy was found, along with a local effect on elements spatially close to the extraneous stimuli. (Editor)

The main objective of the present investigations was to determine whether or not young human infants see the physical spectrum in a categorical fashion as human adults and animals who possess color vision regularly do. (Author)

Sense of direction was studied as a verbal expression of people's estimation of their own spatial orientation ability, rather than as a special mental faculty. Relates sense of direction to cognitive ability and to self concept. (Editor/RK)

Investigations of the relation between judged length and measured length have concentrated on determining the form of the psychophysical function. The process by which the observer arrives at his judgment has not been described. An exploratory experiment was carried out in an attempt to identify the process. (Author)

Article investigated the pattern of results for three series of tests in which monkeys were deprived of sight of their limbs from birth. (Author/RK)

The primary concern in this study has been to interpret the ways in which perception of a letter depends on properties of other letters present in the same display. (Author)

Human visual recognition on the basis of shape but regardless of size was investigated by reaction time methods. Results suggested two processes of size scaling: mental-image transformation and perceptual-scale transformation. Image transformation accounted for matching performance based on visual short-term memory, whereas scale transformation…

Attempts to determine if imagination could replace physical color and pattern in adaptation stimuli known to produce orientation-specific color aftereffects. (Editor/RK)

In feature search tasks, uncertainty about the dimension on which targets differ from the nontargets hampers search performance relative to a situation in which this dimension is known in advance. Typically, these cross-dimensional costs are associated with less efficient guidance of attention to the target. In the present study, participants…