https://www.cambridge.org/core/journals/psychological-medicine/article/abs/relationship-between-happiness-and-intelligent-quotient-the-contribution-of-socioeconomic-and-clinical-factors/852640AC984DB7EC623D9D2C1A2D0A5A
The relationship between happiness and intelligent quotient: the contribution of socio-economic and clinical factors - Volume 43 Issue 6
intelligent quotientrelationshiphappinesscontribution