J Med Assoc Thai 1999; 82 (6):604

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Medical Student Selection: Which Matriculation Scores and Personality Factors are Important?
Chanob T Mail, Boonyanaruthee V

Sixty-five from a total of 160 medical students were administered the California Psychological
Inventory (CPI) to identify which of all 18 scales can be used as a predictor for academic
performance. The entrance examination scores of six subjects were also combined with the CPI
variables for the purpose of the study. Students' performances were determined by Grade Point
Average (GPA) collected between 1993-1997 (year I to year 5). Data was analyzed by descriptive
and stepwise method of multiple linear regression analysis. The results showed that mathematics.
biology and English language were positively correlated with all year GPAs-r2 value was I 0-18
per cent. Scales of "dominance", "flexibility" and "socialization" were positively correlated to the
GPA, while "sociability" and "sense of well-being" were negatively correlated. R2 value was
increased to 16-59 per cent as prediction of GPA when the CPI variables were combined with
scores of entrance examination. A comparison of this finding with other studies was conducted.
Key word : California Psychological Inventory (CPI), Medical Students, Personality, Performance, Achievement, Prediction

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