Biomedical subjects

M A Stadler

Publications and source records attributed to M A Stadler.

3 recordsLinked to original sources

PubMed1990

On imaging and seeing: repetition priming and interactive views of imagery.

The interaction between perceptual and imaginal processes was investigated, with the use of the repetition-priming paradigm. The idea is that the overlap between processes employed in imagery and processes employed in perception will be reflected in the amount of transfer from one encounter with an item that engages perception or imagery and a second encounter that engages perception or imagery. The greater the overlap between perception and imagery, the greater the transfer between them should be. The results showed that perceptual and imaginal processes transferred maximally to themselves; that is, maximum transfer occurred when an item was processed in the same way on both encounters. Further, prior use of perceptual processes transferred to the use of imaginal processes, but not vice versa. These results are discussed as they relate to the interactive view of imagery, which holds that imagery relies on many of the same mental structures and processes as perception.

Adult↗

PubMed1989

On learning complex procedural knowledge.

Lewicki, Czyzewska, and Hoffman (1987) demonstrated learning without awareness in a visual search task. Rules determined target location on every seventh trial on the basis of target locations in the preceding six trials. Learning was demonstrated by negative transfer effects when the rules were changed. When questioned afterwards, the subjects could not describe the rules and denied awareness of them. This experiment was designed to replicate that of Lewicki et al. and to test several hypotheses about this apparent learning without awareness. Transfer conditions were included to determine whether rule learning was primarily perceptual or motor. The present assessment of awareness was based on an objective definition of awareness, rather than a subjective definition as in Lewicki et al.'s study. Their effect was replicated, and the transfer conditions revealed that learning relied on perceptual aspects of the task. The objective measure of awareness provided further evidence that subjects were unaware of the rules.

Adult↗

PubMed1989

Is there a search in fixed-set memory search?

We discuss the hypothesis that structural factors in the fixed-set memory-search task may contribute to the standard linear set-size effect typically observed in this task. We constructed a lexical decision task that contained the same structural factors as the memory-search task. Two structural factors are discussed: (1) the priming of the probe by the memory set, and (2) the confounding of repetitions per item with set size. Our experiment demonstrated that these structural factors play a role in the set-size effect. The implications of these effects for the memory-search task and for models proposed to account for memory-search data are discussed.

Adult↗