Three experiments examined what happens to reaction time to verify easy items when they are mixed with difficult items in a verification task. Subjects verification of simple arithmetic equations and sentences took longer when placed in a difficult list. Difficult sentences also slowed the verification of easy arithmetic equations. (Author/RD)

Four commissurotomy patients were tested for ability to match tachistoscopically presented stimuli with pictures in free vision, according to either structural appearance or functional/conceptual category. (Editor)

A series of experiments tested a recent suggestion that vertical symmetry of a stimulus display can serve as a visual diagnostic for responding "same" in a letter-matching task. The data of chief interest were same reaction times to vertically symmetric (e.g., AA) and asymmetric (e.g., LL) displays, each composed of two side-by-side uppercase…

Attempts to establish the degree of perspective convergence, which the Western observer will accept as a realistic portrayal of objects drawn in perspective, and to determine the relationship between acceptable convergence and viewing conditions. (Author/RK)

This article reported the development of a method aimed at exploring the relations among covert muscle behavior, mental imagery, and the perception of external stimulation. (Author/RK)

Three experiments assessed the effect of visual familiarity of words on "same-different" reaction times (RTs) in a simultaneous-matching task. All three studies showed visual familiarity to be responsible for differences in slope over sequence length between words and nonwords. (Editor/RK)

The physical identity reaction time task used in this study was designed to further test the effect of processing mode uncertainty on visual field asymmetries that Swanson et al. (1974) reported, and to determine the effects of location uncertainty in a cognitive task. (Author/KC)

The experiments reported here are aimed at exploring in more detail the possibility that context can improve perception itself. In particular, they are concerned with clarifying the conditions under which context might aid perception and with localizing the stage of processing at which context would have its effects. (Author)

These experiments were designed to assess the linguistic performance of the right hemisphere by using reaction time (RT) to measure the flow of information in the normal brain. RT to lateralized stimuli has proved to be a powerful tool for detecting functional differences between the hemispheres on a variety of cognitive tasks. (Author/RK)

Studies the processing of pictures and words as symbols. Shows that the superiority of pictures results from the fact that pictures are interpreted more quickly than words, but that after the interpretation is made, processing is the same. Also gives evidence that pictures and words are both processed in terms of linguistic codes rather than…

Three experiments were conducted to evaluate the P300 component of the human evoked response as an index of bisensory information processing. Data shows that the P300 promises to be a valuable tool for assessing brain processes during complex decision making. (Editor/RK)

In 1974 Wood proposed a hybrid serial-parallel model to account for the within-stimulus interactions between the acoustic cue of "pitch" and the phonetic cue of "place". These experiments found Wood's research independent of his subjects' experience, the order of cue presentation, and whether the cues are presented simultaneously or sequentially.…

Considers listener expectancies based on timing redundancy in continuous speech and the interaction between the effects of segmental and suprasegmental cues during ongoing perception. (Editor/RK)

Subjects were asked to decide if a pair of visually presented letter strings were both words (lexical decision task). Results supported an automatic spread of excitation model of associative facilitation. (Editor/RK)

This research investigated the extent to which three suggested divided- attention effects--time delay, noise addition, and response bias change, as assessed by three cross-over-model parameters--were manifest when a manual, compensatory tracking task was performed concurrently with two secondary tasks. (Author/RK)