Nuņez, Domingo B.  4  0   <br/><br/>
Cross validation of the Brainard Occupational Preference Inventory (BOPI) /        6 
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Domingo B. Nuņez. 
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<br/><br/>   Thesis (M.A.) -- Pamantasan ng Lungsod ng Maynila, 1981.;A thesis presented to the faculty of the Graduate School of Arts, Sciences and Education in partial fulfillment of the requirements for the degree Master of Arts in Psychology. 
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<br/><br/> ABSTRACT:  This investigation aimed to cross validate the BOPI among selected secondary school students. Specifically, it attempted to obtain the school norms for the BOPI, to establish its concurrent validity as criterion measured by the grades in the basic school subjects, and to determine its reliability.  With the BOPI as the principal tool administered to 740 secondary school students selected through the combined purposive and systematic random sampling techniques and with the school grades of the participants in the basic subjects during the 3rd grading period of the school year 1979-1980, the data were statistically treated using means, standard deviations, percentile, quintiles, Pearson r, Spearman-Brown formula and the t-test for coefficients of correlations.  The school norms of the BOPI are presented in the form of means, standard deviations, percentiles, and quintiles. The concurrent validity of the BOPI test scores with school grades in the basic subjects did not provide consistent trends, although a considerable number of the coefficients of correlation proved significant either positively or negatively at the .05 or .01 level. An internal test of validity as provided further by the intercorrelations between and among field scores indicated high independence of each occupational field from the others. Results of the split-half reliability tests corrected by the Spearman-Brown prophecy formula gave an average of the coefficients of correlations at .82, manifesting a moderate to high consistency of the BOPI test scores with local samples.       
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