The experiments reported here investigate the effects of different kinds of set on hemisphere differences, and confirm that, in some conditions, the hemispheric asymmetry in a particular task may shift when cuing establishes an attentional set. (Author)

To what extent does prior knowledge of a superordinate category facilitate recognition of an instance of that category? The results of this study reveal that the facilitating effect of a category prime on perceptual processing is inversely related to the quality of the stimulus information available. (Author/RK)

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…

While responses permitting no change in location are learned very slowly, responses that allow unambiguous flight from a dangerous location are learned very rapidly. Two experiments examine the possible reinforcing properties of the flight response in avoidance acquisition. (Author/RK)

Recent laboratory work on the recall of pictures has produced a pattern suggesting that memory for certain classes of stimuli may be hypermnesiac rather than amnesiac (Ebbinghaus, 1885/1964), increasing over time and recall attempts. This research tries to determine the magnitude of memory growth over significant time intervals, e.g., a week…

In an attempt to assess the validity of the distinction between episodic and semantic memory, this research examined the influence of two variables on sentence verification (presumably a semantic memory task) and sentence recognition (presumably an episodic memory task). ( Editor)

A perspective, based on an elaboration of Underwood's (1969) attributes model of memory, is advanced which proposes that for all types of information both detailed and thematic attributes are stored. Two experiments using prose passages as stimulus materials test this proposal. (Editor/RK)

In two experiments, recognition accuracy was compared between subjects who made frequency judgments and subjects who made recognition judgments. Results indicate that at least partially different information in memory is evaluated when judging frequency than when making recognition judgments and that this information facilitates recognition…

The paradigm producing recognition failure of recallable words was investigated in a series of three experiments. Results indicate that retrieval asymmetry: (a) exists in the recognition failure paradigm directly following list study, (b) increases significantly following a free-association task aimed at generation of the target words from the…

An experiment examined the mnemonic effects of initial testing with semantic, orthographic, temporal, and recognition cues. Results were interpreted within a levels-of-processing framework in which the nature of the information used in retrieval, rather than the speed or difficulty of retrieval determines subsequent accessibility. (Editor/RK)

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

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…

The salience of encoding attributes in instances of differing levels of category membership was examined using the release from proactive interference (PI) task with college students. Results are discussed in terms of providing converging evidence for Rosch's (1973,1975) theory of semantic category structure. (Editor/RK)

Two experiments demonstrate that individuals are limited in the number of unrelated words they can apprehend and assign to a particular semantic dimension and also that retrieval from long-term memory is subject to the same kind of limitation. (Author/RK)