Abstract
A group of Filipino seminarians (experimental group) had an intervention of Positive thoughts enhancement and Interpersonal skills developed by the researcher (11 modules) tailored fit for a Filipino culture seminarians and another group of Filipino seminarians (controlled group) had a normal setting lecture of formation. A pre-test and posttest of the seminarians’ psychosocial development with a Psychosocial Development measurement tool (The Modified Erikson Psychosocial Stage Inventory - MEPSI) was used to find out if there was an efficacy of the intervention. The posttest result of the experimental group was significantly higher than those of the control group which indicated that the intervention program (Positive Affirmation Skills Intervention – (PASI) was effective on the Psychosocial Development of the Seminarians. An incremental increase in the scores of the experimental group after exposure in the intervention and the participants in the experimental group experienced not only an enhancement of their psychosocial development attributes but had a high level of self-depth as compared to the control group which made an impact on their psychosocial development characteristics and attributes.