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Opposing effects of semantic diversity in lexical and semantic relatedness decisions.

Hoffman P, Woollams AM - J Exp Psychol Hum Percept Perform (2015)

Bottom Line: The latter result diverges from previous findings using homonyms, in which ambiguity effects have only been found for related word pairs.Greater variability in the orthography-to-semantic mappings of high SemD words resulted in a lower degree of similarity for related pairs of this type.These results support the view that polysemous variation in word meaning can be conceptualized in terms of graded variation in distributed semantic representations.

View Article: PubMed Central - PubMed

Affiliation: Centre for Cognitive Ageing and Cognitive Epidemiology (CCACE), Department of Psychology, University of Edinburgh.

No MeSH data available.


Total activation of semantic units during word processing.
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fig5: Total activation of semantic units during word processing.

Mentions: It is generally assumed that more rapid and robust activation of semantic representations has a beneficial effect on lexical decisions. We would therefore expect the model to produce greater activation for high SemD words, since Experiment 1 showed a small RT advantage for these words in lexical decision. Figure 5 shows the total activation of the semantic units at each time-step for high and low SemD words. We analyzed these results with 2 (Word Type) × 28 (Time-Step) ANOVAs. There was a main effect of SemD, F1(1,9) = 254, p < .001; F2(1,94) = 158, p < .001; favoring high SemD words, an effect of time, F1(27,243) = 3331, p < .001; F2(27,2538) = 120,812, p < .001; and an interaction, F1(27,243) = 226, p < .001; F2(27,2538) = 152, p < .001. This confirms that high SemD words elicited more rapid and robust activation of the semantic units overall, indicating that the model could account for the processing advantage for these words in lexical decision.


Opposing effects of semantic diversity in lexical and semantic relatedness decisions.

Hoffman P, Woollams AM - J Exp Psychol Hum Percept Perform (2015)

Total activation of semantic units during word processing.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4378535&req=5

fig5: Total activation of semantic units during word processing.
Mentions: It is generally assumed that more rapid and robust activation of semantic representations has a beneficial effect on lexical decisions. We would therefore expect the model to produce greater activation for high SemD words, since Experiment 1 showed a small RT advantage for these words in lexical decision. Figure 5 shows the total activation of the semantic units at each time-step for high and low SemD words. We analyzed these results with 2 (Word Type) × 28 (Time-Step) ANOVAs. There was a main effect of SemD, F1(1,9) = 254, p < .001; F2(1,94) = 158, p < .001; favoring high SemD words, an effect of time, F1(27,243) = 3331, p < .001; F2(27,2538) = 120,812, p < .001; and an interaction, F1(27,243) = 226, p < .001; F2(27,2538) = 152, p < .001. This confirms that high SemD words elicited more rapid and robust activation of the semantic units overall, indicating that the model could account for the processing advantage for these words in lexical decision.

Bottom Line: The latter result diverges from previous findings using homonyms, in which ambiguity effects have only been found for related word pairs.Greater variability in the orthography-to-semantic mappings of high SemD words resulted in a lower degree of similarity for related pairs of this type.These results support the view that polysemous variation in word meaning can be conceptualized in terms of graded variation in distributed semantic representations.

View Article: PubMed Central - PubMed

Affiliation: Centre for Cognitive Ageing and Cognitive Epidemiology (CCACE), Department of Psychology, University of Edinburgh.

No MeSH data available.