A model was proposed as an alternative to current models for categorical perception, which refers to the apparent responding to stimuli only in absolute terms. The model proposed that a single (common) factor causes both a peak in the discrimination function and a categorical dichotomy and thus the correlation between the two. (Editor/RK)

Three experiments are reported that were designed to delineate the properties of the stimulus encoding stage in reaction time tasks of varying stimulus-response compatibility. (Editor)

Three experiments studied the effect of amount and type of concurrent memory load on the rate of readout from iconic memory. (Editor)

When asked to report the first digit that comes to mind, a predominant number (28.4 percent) of the respondents choose 7. Three further experiments sought to establish whether this predominance is due to an automatic activation process or to a deliberate choice. (Editor)

Research by Posner and Mitchell (1967) was used to investigate levels of noise processing in testing subjects' ability to "gate out" the processing of irrelevant and unwanted material. Three experiments are reported in which subjects had to judge whether two letters were the "same" or "different". Noise elements were included to test attention…

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)

Three experiments investigated the relationship in speech perception between the mechanisms that determine the source of speech sounds and those that analyze their actual acoustic contents and extract from them the acoustic cues to a sound's phonetic description. (Author/RK)

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

Demonstrates that categorization of speech sounds can be influenced by the phonetic structure of connected speech. (Editor/RK)

Two initial experiments demonstrated that direction aftereffects of potentiation in the extraocular muscles (induced through sustained versional rotation to the side) generally increase as a function of the magnitude and duration of the inducing ocular rotation and can be built up under conditions of varied as well as constant fixation. (Editor)

Two experiments examined the effect of concurrently holding 0, 2, 4, or 6 nouns in memory on the recognition of visual stimuli briefly presented to the left or right visual fields. (Editor)

A familiarity effect in these experiments is defined as a subject's ability to respond more rapidly to a familiar stimulus than to an unfamiliar stimulus. Evidence indicates that familiarity does not affect an initial encoding process, but it can affect a comparison process. (Editor/RK)

A phonetic confusion model and some procedural artifacts were eliminated as sources for individual differences in fusion rate. Results of these two experiments were consistent with the hypothesis that individual differences in fusion rate are due to differences in perceptual dependence on linguistic rules. (Editor/RK)

In four experiments involving blindfolded subjects, constant errors in the haptic judgment of extent in the horizontal plane were found to relate consistently to the time and velocity of limb movement. Taken together with additional information on judgments of movement duration, the results suggest that the illusion of extent is modulated by the…

To determine whether perceptual asymmetries for faces occur at early or late stages of stimulus analysis, subjects compared the members of a pair of faces which appeared in the right or left visual field, either to each other or to a previously presented sample. (Editor)