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9 results for “number discrimination”
Data from: Does the number of functional olfactory receptor genes predict olfactory sensitivity and discrimination performance in mammals?
<p>The number of functional genes coding for olfactory receptors differs markedly between species and has repeatedly been suggested to be predictive of a species' olfactory capabilities. To test this assumption, we compiled a database of all published olfactory detection threshold values in mammals and used three sets of data on olfactory discrimination performance that employed the same structurally related monomolecular odor pairs with different mammal species. We extracted the number of functional olfactory receptor genes of the 20 mammal species for which we found data on olfactory sensitivity and/or olfactory discrimination performance from the Chordata Olfactory Receptor Database. We found that the overall olfactory detection thresholds significantly correlates with the number of functional olfactory receptor genes. Similarly, the overall proportion of successfully discriminated monomolecular odor pairs significantly correlates with the number of functional olfactory receptor genes. These results provide the first statistically robust evidence for the relation between olfactory capabilities and their genomics correlates. However, when analysed individually, of the 44 monomolecular odorants for which data on olfactory sensitivity from at least five mammal species are available, only five yielded a significant correlation between olfactory detection thresholds and the number of functional olfactory receptors genes. Also, for the olfactory discrimination performance, no significant correlation was found for any of the 74 relationships between the proportion of successfully discriminated monomolecular odor pairs and the number of functional olfactory receptor genes. While only a rather limited amount of data on olfactory detection thresholds and olfactory discrimination scores in a rather limited number of mammal species is available so far, we conclude that the number of functional olfactory receptor genes may be a predictor of olfactory sensitivity and discrimination performance in mammals.</p>
Data from: Keep numbers in view: Red-eared sliders (Trachemys scripta elegans) learn to discriminate relative quantities
<p><span>The ability to discriminate relative quantities, one of the numerical competences, is considered as an adaptive trait in uncertain environments. Besides humans, previous studies have reported this capacity in several non-human primates and birds.</span><span> Here, we test whether red-eared sliders (<em>Trachemys scripta elegans</em>) can </span><span>discriminate different relative quantities</span><span>. Subjects were first trained to distinguish different stimuli with food reward. Then, they were tested with novel stimuli pairs to demonstrate how they distinguished the stimuli. The r</span><span>esults show that most subjects can complete the initial training and use relative quantity rather than absolute quantity to make choices during testing phase. This study provides behavioural evidence of relative quantity</span> <span>discrimination in a reptile species, and suggests that such capacity may be widespread among vertebrates.</span></p>
Data from: Keep numbers in view: Red-eared sliders (Trachemys scripta elegans) learn to discriminate relative quantities
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Response to intruder number is related to quantity discrimination performance in a wild bird
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Data from: Does the number of functional olfactory receptor genes predict olfactory sensitivity and discrimination performance in mammals?
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Primitive quartic number fields of absolute discriminant at most 10^9
<p>Complete list of all primitive number fields of degree 4 and absolute discriminant at most 10<sup>9</sup>. Computed through a method similar to that of Belabas [1], but starting from Bhargava's bijection [2] instead of Davenport-Heilbronn's.</p> <p>File "raw": the following data are given for each field:</p> <ul> <li>Coefficients of a pair (F<sub>1</sub>, F<sub>2</sub>) of ternary quadratic forms corresponding to the field under Bhargava's bijection: F<sub>1</sub> = v<sub>0</sub> x<sup>2</sup> + v<sub>1</sub> x y + v<sub>2</sub> x z + v<sub>3</sub> y<sup>2</sup> + v<sub>4</sub> y z + v<sub>5</sub> z<sup>2</sup> and F<sub>2</sub> = v<sub>6</sub> x<sup>2</sup> + v<sub>7</sub> x y + v<sub>8</sub> x z + v<sub>9</sub> y<sup>2</sup> + v<sub>10</sub> y z + v<sub>11</sub> z<sup>2</sup>.</li> <li>Cubic covariant of (F<sub>1</sub>, F<sub>2</sub>): if M<sub>1</sub>, M<sub>2</sub> are the matrices representing F<sub>1</sub>, F<sub>2</sub>, then 4 det(x M<sub>1</sub> + y M<sub>2</sub>) = p<sub>0</sub> x<sup>3</sup> + p<sub>1</sub> x<sup>2</sup> y + p<sub>2</sub> x y<sup>2</sup> + p<sub>3</sub> y<sup>3</sup>.</li> <li>Resultant of F<sub>1</sub>(x, y, 1) and F<sub>2</sub>(x, y, 1) with respect to y: r<sub>0</sub> x<sup>4</sup> + r<sub>1</sub> x<sup>3</sup> + r<sub>2</sub> x<sup>2</sup> + r<sub>3</sub> x + r<sub>4</sub>. This is a defining polynomial for the field.</li> </ul> <p>Files "Ti.gp": the index i is the number of pairs of complex embeddings. The following data are given for each field:</p> <ul> <li>Discriminant.</li> <li>Coefficients of the canonical defining polynomial for the field, as given by PARI's function polredabs.</li> <li>Number of elements and cyclic decomposition of the class group, as given by PARI's function bnfinit.</li> </ul> <p>The following sanity checks have been performed:</p> <ul> <li>The number of totally real fields agrees with that computed by Malle [3] using Hunter's method.</li> <li>The list of discriminants (with multiplicities) agrees with that computed by PARI's function nflist using class field theory (conditionally on the generalised Riemann hypothesis).</li> </ul> <p>References:</p> <ol> <li>Karim Belabas. A fast algorithm to compute cubic fields. <em>Math. Comp.</em>, 66(219):1213–1237, 1997.</li> <li>Manjul Bhargava. Higher composition laws. III. The parametrization of quartic rings. <em>Ann. of Math. (2)</em>, 159(3):1329–1360, 2004.</li> <li>Gunter Malle. The totally real primitive number fields of discriminant at most 10<sup>9</sup>. In <em>Algorithmic number theory</em>, volume 4076 of <em>Lecture Notes in Comput. Sci.</em>, pages 114–123. Springer, Berlin, 2006.</li> </ol>
Data from: Discovery and characterization of a large number of diagnostic markers to discriminate Oncorhynchus mykiss and O. clarkii
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Data from: Honey bees use absolute rather than relative numerosity in number discrimination
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Data from: Pharmacological inactivation does not support a unique causal role for intraparietal sulcus in the discrimination of visual number
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.