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biserial correlation coefficient |
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biserial correlation coefficient [¦bī¦sir·ē·əl ‚kär·ə′lā·shən ‚kō·ə‚fish·ənt] (statistics) A measure of the relationship between two qualities, one of which is a measurable random variable and the other a variable which is dichotomous, classified according to the presence or absence of an attribute; not a product moment correlation coefficient. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Figure 1 shows that a point biserial correlation between subjective difficulty rating and correct selection of functional hypothesis exists for only one case, while for 5 out of 10 cases difficulty ratings correlate with treatment selection accuracy. The point biserial correlation coefficients shown in Tables 1 and 2 indicate the correlations (-1 to +1) between each item score and the cumulative score obtained from the remaining items across the test subject sample. The top 10 factors (of 14 possible) from the Pearson and point biserial correlation matrices were used in the all-possible regression. |
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