ABSTRACT
Introduction: A variety of biological, psychological, religious, and philosophical approaches have striven to define happiness and identify its sources. The evolutionary perspective offers an alternative approach to understand what happiness or quality of life is about. Aims and Objectives: Aim of this analytical and introductory research is to get validation and assessment of validity and reliability of happiness test among the university students of Tehran-the city of Iran. Method: The persons who had been assessed and analyzed in this research were 724 students. 116 persons were involved for administrative works of this research and 608 persons (304 girls, 304 boys) from various departments of university. Results: The measurement of validity coefficient of entire questionnaire at the stage of execution with the Cronbach’s alpha method was 0/8545 and the validity of subtest of positive thinking, optimism, extravert personality, less expectations, close relations, dropping the negative feelings, to get the perfect personality, realism and full of energy were 8219/0, 6608/0, 4661/0, 5705/0, 4969/0, 3518/0, 2934/0, 1816/0 respectively. Conclusion: we can say that happiness test has high construct reliability.