Classification of exploratory procedures by haptic perception MURATA, Kayoko; ARAI, Tetsuya; KOMATSU, Hidemi ...
The Proceedings of the Annual Convention of the Japanese Psychological Association,
2010/09/20, 2010-9-20, Volume:
74
Journal Article
We made a solid three-dimensional object of the Redies-Spillmann figure and found two kinds of completely different phenomena. First, transparent color-spreading was observed in the empty space ...around the object. Second, another perceptual organization occurred: observers perceived a cross as a cross-shaped slit through which to see, and then they perceived spreading color disappear entirely. They reported an apparent opaque occluding surface which was localized at the same depth as the slit but was in fact the background. They also reported a colored circle which was mostly occluded by the surface with a cross-shaped slit. We interpreted the circle as being amodally completed in the sense described by Kanizsa in 1955. Even when the figure was drawn on a piece of paper, we observed these two perceptions. We examined whether other stimuli causing neon color-spreading lead to reports of the perception for the Redies-Spillmann figure and found that all the stimuli we examined led to reports of the same kind of perception. Interestingly, the shape of color-spreading was the same as that of the amodal completion.
A configuration of 5 Munsell neutral gray squares on a gray and white background and a modulus were haploscopically presented to 12 Ss. Each S made brightness estimates for the squares, their ...background, and the illumination of total field when illuminance was varied in 3 steps over 1.2 log units. Linear brightness functions were obtained on a log-log plot, where brightness estimates were plotted against illuminance. Mean slopes systematically decreased as the reflectance of test region became lower, but none were negative. The failure to find negative slopes would be a difficulty for Jameson and Hurvich's opponentprocess model. Some problematic issues concerning brightness constancy and contrast were discussed.
Trichobezoars (hair bezoars) are primarily observed in adolescent girls who pull their hair followed by its ingestion. Endoscopic removal of trichobezoars is challenging, and these masses often ...require surgical removal. Recently, although it has been reported that Coca‐Cola could effectively dissolve persimmon phytobezoars, it was ineffective in dissolving trichobezoars. We report a case in which Coca‐Cola was directly injected into a trichobezoar followed by successful endoscopic removal of the mass. A 9‐year‐old girl visited our hospital with abdominal pain and nausea, wherein abdominal radiography revealed a mass in the stomach. Her mother witnessed her pulling and ingesting her hair 6 months previously. An upper endoscopy was performed for diagnosis of the trichobezoar. Endoscopic removal of the mass was performed under general anesthesia following oral administration of Coca‐Cola at a dose of 100 mL thrice a day for 10 days. Initially, we attempted endoscopic extraction using grasping forceps and a radiofrequency snare. However, the bezoar could not be fragmented and did not pass through the cardia. Thus, Coca‐Cola was injected directly into the bezoar using a local injection needle, which facilitated the separation of the bezoar and allowed the grasping forceps to fragment it to a size that could pass through the cardia. Owing to the large size of the bezoar, we could remove 180 g of it without complications. The patient received psychological counseling after the procedure, to prevent recurrence. In conclusion, direct injection of Coca‐Cola was effective in the complete endoscopic removal of trichobezoars.
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