In this study, the influence of gender and age in the importance allocated to several factors in the decision process was investigated from a naturalistic perspective. For this purpose, the Decision-Making Questionnaire, DMQ was administered to a sample of 589 participants (294 men and 295 women) of ages between 18-80 years old, who were grouped into three developmental stages: youths 18-25 years (n= 207; 97 men and 110 women); adults 26-65 years (n= 205; 110 men and 95 women), and retired persons 66-80 years (n= 177; 87 men and 90 women). The statistical analyses revealed significant differences due both to gender and age in participants¿ perception of the factors that determine their decision processes.