To study the relationship between cognitive intelligence and emotional intelligence in Thai youth. Eight hundred and sixty Thai students between 15 to 18 years of age from one high school, two vocational schools, and one university in central Thailand were given 2 measures assessing their general intelligence and emotional intelligence. General intelligence was assessed by Raven's Advance Progressive Matrices and emotional intelligence was assessed by a scale, based on the model of emotional intelligence developed by Mayer&Salovey (1997), constructed by the author. The results are as follows: 1. Cognitive intelligence is positively correlated with emotional intelligence (r=.435, p<.001). 2. Both cognitive intelligence and emotional intelligence are not significantly correlated with age, r=-.027 and r=.036 respectively for cognitive and emotional intelligence (p>.05). 3. Female subjects, emotional intelligence is higher than male's at the same age level, t=2.158(p<.05), t=1.974(p<.05), t=3.406(p=.001), and t=2.014(p<.05) respectively for ages 15, 16, 17 and 18. 4. The following factors have influences on emotional intelligence: cognitive intelligence, sex, field of education, level of education, family relation and the parent's occupation in creative and service fields, (R=.576, p<.001). 5. The following factors have influences on cognitive intelligence: sex, age, family relation, family income, parent's education and occupation (teacher, doctor/nurse, accountant, and unemployed), (R=.599, p<.001)
