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KMID : 0917520000070010065
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Journal of Speech Sciences
2000 Volume.7 No. 1 p.65 ~ p.75
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The Effect of Olfactory Stimulation on Word Retrieval Performance in Aphasics
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Jeong Ok-Ran
Lee Young-Mi
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Abstract
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The present study attempted to determine the effect of olfactory stimulation on word retrieval deficit in Korean aphasics. Eleven nonfluent and 9 fluen aphasic patients served as subjects. The 20 subjects´ age ranged from 14 to 65 with the mean of 43.0 (SD: 17.6). A neuroloist examined them and diagnosed that they had no visual, auditory, and olfactory impairment.
The study consisted of 2 experiments: Experiment I included visual stimulation while experiment II included visual and olfactory stimulation. The subjects were presented with 19 pictures for them to name in the experiment I, whereas they were exposed to the 19 pictures along with the corresponding olfactory stimulus in the experiment II. The 19 items included soy sauce, chilly pepper, kimchi, chewing gum, cigarette (smoked), soybean paste, lemon, banana, alcohol (wine), apple, fish, vinegar, cuttlefish (dried), milk, rose, sesame oil, melon,coffee, and perfume. The results were as follows: First, olfactory stimulation tended to improve aphasics´ word retrieval deficit although the improvement was not statistically significant. Second, the nonfluent aphasics seemed to take more advantage from olfactory stimulation compared to the fluent aphasics. Third, olfactory stimulation (olfactory + visual) did not produce a different naming performance compared to visual stimulation in the pre- and post-test when the pre- and post-test was composed of naming tasks through auditory + visual stimulation. Fourth, the fluent aphasics performed better with unpleasant olfactory stimulus while the nonfluent aphasics performed better with pleasant olfactory stimulus.
Keywords : olfactory stimulation, visual stimulation, word retrieval deficit
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