Science and Education Publishing American Journal of Educational Research 2333-4770 2 11 2014 11 19 What Matters Most? Determinants of Administrative Effectiveness 1088 1090 EN Khuda Bakhsh Assistant Professor, GC University, Faisalabad Azhar Mumtaz Saadi Shafqat Rassol EDUCATION201421113 10.12691/education-2-11-13 2014 10 20 2014 11 07 2014 11 19 The study focused on certain factors influencing the effectiveness of Heads of Departments in public sector universities. The researcher developed a questionnaire to measure the determinants and the effectiveness was measured by Leadership Practices Inventory LPI. A sample of five hundreds teachers from twenty one randomly selected universities participated in the study. Regression analysis of the collected data was made to answer 'How well the selected factors influence the administrative effectiveness of Heads of Departments (HoDs)'. It was found that all the selected factors are positively correlated with administrative effectiveness. Personality Traits proved as strongest determinant followed by organizational climate with significant predictive powers.