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R L Duchnicky

Publications and source records attributed to R L Duchnicky.

4 recordsLinked to original sources
PubMed1985

Size in the visual processing of faces and words.

We studied the influence of variations of stimulus size upon recognition of words and faces. Size played an important role in the recognition of faces but was irrelevant to the recognition of words, over a range of sizes. More detailed analysis revealed that although irrelevant to recognition, size of words was nevertheless encoded, with some consequences similar to those for recognition of faces. The results were interpreted in terms of stimulus-specific analyses, and this view was contrasted with other notions of mental representation.

Face↗
PubMed1985

Discontinuity in cognitive skill.

Skill at reading geometrically transformed text improves as a function of practice across pages. A belief in continuity of learning must suppose a proportionate improvement in skill within pages. We tested for continuity of learning by comparing performance within pages with performance between pages, varying timing of text presentation and quantity of text presented for the purpose. Reanalysis of some published data and three new experiments indicated that skill is acquired continuously as a function of practice but is expressed discontinuously. We conjecture that the expression of skill requires perceptual segregation of tasks into task units to which skill is transferred, whereas acquisition of competence occurs as a strict function of practice.

Adult↗