[Quantitative analysis of spatial ventricular gradient. 1. Spatial ventricular gradient in normal subjects].
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We analyzed detection asymmetry, using openand closed squares as target and contextelements. It was found that varying density, regularity, and target eccentricity not only can modulate the amount of asymmetry, but also can produce a reversal in the direction of the asymmetry. The results suggest that the different stimuli are processed with different grains of analysis,consisting of in some cases, single elements and their properties and, in other cases, larger units of the stimulus array and more globalproperties. A detection task that can utilize the properties that are available with a given grain of analysis would show an advantage over a task for which the given grain of analysis is not as favorable, resulting indetection asymmetry in one direction or another.
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The present study was aimed at assessment of a degree of regional differences in hospitalized morbidity in Poland for some of diseases considered to be related to environmental contamination and its relationship with general environmental characteristic of the regions. The performed analysis has shown that however in recent years there have been substantial differences in the discharge rates between provinces of Poland, these differences are not well explained by differences in general environmental factors. The possible reasons of these results have been discussed.