MANUAL WISC III VERSION CHILENA PDF

The sample for the study consisted in children obtained from a ramdomized stratified sampling considering the regions of Chile. Results show a great coincidence with those obtained in the original north-american sample: we obtained the same four intelligence factors and high internal consistencies. Nevertheless, the subscales included in the factors differ slightly from the north-american results. Esta escala fue estandarizada en Chile en por Campazzo. Al respecto, en Estados Unidos diversas investigaciones muestran que en los mismos individuos, los CI. Muchos peritajes judiciales utilizan esta prueba.

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By Jessica Griggs. Some people in the US may have been wrongly executed because of inaccuracies in the IQ tests used to assess them. But the inaccuracies may also have seen some escape execution if they scored lower on the tests than their real IQ.

An IQ of 70 is generally considered the threshold — making Teresa Lewis IQ 72 , who was executed in September last year, a borderline case. Whitaker says that setting a cut-off point at 70 is too simplistic, given that his results suggest IQ tests may provide inaccurate results at this end of the IQ scale. He offers a simple explanation for the wide error margins in IQ readings at the low end of the scale.

The statistics used to arrive at the 95 per cent confidence level for the tests are based on the IQs of a representative sample of the population. In performing his calculation, Whitaker considered other sources of error such as the differences that may arise between scores an individual achieves if they take the IQ test several times.

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Inaccurate IQs could be a matter of life and death

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