On the other hand, it shows moderate range of number of chambers (range 9.79-10.71; average 10.36) and dextrality (range 53.84-75.00%; average 64.83%) within Cluster B.
The correlation coefficient between the morphological variations (average test size, proloculus size, number of chambers, and dextrality) and the ecological parameters, namely, SST, SSS, nitrate content, phosphate content, total nutrient (nitrate + phosphate), and dissolved oxygen, was performed (Tables 3(a) and 3(b)).
Moreover, in our study, it is recorded that an increase in phosphate leads to a rise in dextrality and number of chambers.
SST dextrality ([degrees]C) (%) A 70.31 14.61 B 67.32 20.55 [B.sub.1] 54.29 21.27 [B.sub.2] 82.85 21.11 [B.sub.3] 64.83 19.27 Clusters Subclusters Ecological parameters Avg.
The results for the spelling test showed superior performance of the most dextral individuals, poorest performance of the most sinistral, and intermediate performance by the groups with intermediate dextrality. On the test of non-verbal intelligence (the Cattell), the most sinistral of the four groups had the lowest scores, while scores of the other groups were essentially comparable to one another.
The primary purpose of the present study was to test the hypothesis that degree of dextrality, as defined by Annett's hand preference classes, would be negatively related to visuospatial ability.
This indicates that dextrality was associated with better visuospatial performance in males.
Spatial ability appears to be at risk in the presence of bias to dextrality
in left-handers and in right-handers (Annett, 1992b).
Predictions about which abilities should show linear trends (positive or negative) or quadratic trends with increasing bias to dextrality will become clearer as the hypothesis of a BP + HA is further developed.
Right handers with the weakest bias to dextrality (class 4, who were outstanding for spatial ability in children and students) had more left-handed children than right-handers with the strongest bias to dextrality (class 2, who had the lowest scores for spatial ability) (Annett, 1992d, in press).
A double dissociation between specific deficits for auditory versus visual memory for words and the absence of the shift to dextrality versus its strong presence.