The study of individual differences in positive characteristics has mainly focused on moral traits. The objectives of this research were to study individual differences in positive characteristics from the point of view of the layperson, including non-moral individual characteristics, and to generate a replicable model of positive factors. Three studies based on a lexical approach were conducted. The first study generated a corpus of words which resulted in a refined list of socially shared positive characteristics. The second study produced a five-factor model of positive characteristics: erudition, peace, cheerfulness, honesty, and tenacity. The third study confirmed the model with a different sample. The five-positive-factor model not only showed positive associations with emotional, psychological and social well-being, but it also accounted for the variance beyond that accounted for by the Big Five factors in predicting these well-being dimensions. In addition, the presence of convergent and divergent validity of the five positive factors is shown with relation to the Values-in-Action (VIA) classification of character strengths proposed by Peterson and Seligman (2004).

The primary objective of this research was to study the differences in positive traits between military and civilian college students and between cadets in their first and final years at a military academy. Second, the research aimed to study the relations between positive traits and the academic and military performance of cadets in their first and final years, according to the classification of positive traits by Peterson and Seligman (2004). To accomplish these objectives, a sample of university students from a military educational institution and a sample of civilian university students were studied. The instruments used were a 24-item self-report measure of positive traits, a measure of social desirability, and objective scores of academic and military performance. The results generally showed that when age and career stage were held constant, the scores of the military students were higher than the scores of the civilian students across various strengths. Military students reported higher levels of the character strength of spirituality than did civilian students. The relationships between strengths and performance differed for students in their first and final years at the military academy. In particular, cadets with the higher levels of academic or military performance in their last year, i.e., the cadets best adapted to the academy, reported higher levels of the character strength of persistence when compared to low-performing cadets in the same year of study.

Traditionally, models of positive personality traits have referred to moral characteristics. The High Five Model (HFM) is a factor model of individual positive traits based on an inductive psycho-lexical approach. Unlike other models, in the HFM the positive characteristics were freely determined by lay people, beyond any moral tones. The HFM comprises the following factors: erudition, peace, cheerfulness, honesty, and tenacity, known as “the high factors.” This model was shown to positively exceed the capacity of normal personality to predict emotional, social, and psychological well-being. Additionally, this model is negatively associated with non-transmissible diseases, psychopathological symptoms, and psychopathological personality traits. This study aimed to increase the validation of the HFM, by analyzing the relationships among this model and positive mental health, psychopathological symptoms, academic adjustment, and academic performance in university students. Another objective was to study the association between complete mental well-being (i.e., high well-being and low psychopathological symptomatology) and the high factors of the HFM. The sample consisted of 256 university students. Correlations were calculated, and the two-step cluster analysis was used to obtain profiles. The results showed that tenacity and erudition high factors are positively associated with academic achievement and academic adjustment. Finally, each of the high factors was positively associated with complete mental well-being. The HFM has a broad scope, as it is related not only to psychological variables (e.g., well-being or psychopathological symptomatology) but also to academic performance (e.g., adjustment and achievement) in university students.

Positive Psychology is the scientific study of the positive subjective experiences, positive individual traits, and positive institutions. Understanding positive individual traits consists of the study of the character strengths and virtues. After a long hiatus, the study of moral character has started up again in scientific psychology. The development of an assessment instrument of the character strengths and virtues based upon the Peterson and Seligman character