The present study is about the validation of the Young Schema Questionnaire 3^rd version and the Schema Mode Inventory 2^nd version on the Greek population. The participants were both male (58.7%) and female (41.2%). The participants were also without psychopathology, outpatients and inpatients, varied in ages from 19 to 62 years, with the majority being in the age group between 31 - 35. From the analysis conducted, both questionnaires’ factors had high internal consistency in all three participant’s groups. We have also conducted a Pearson analysis between the Early Maladaptive Schemas and Schema Modes, which produced some strong positive and negative correlations. Finally in the present study, we are presenting a Cohen analysis conducted between the three different groups of participants (non-patients, outpatients and inpatients).