We are very pleased to introduce the proceedings of4th International Conference on Industrial and Organizational Psychology: Trends, Challenges, and Applications. This conference was held on the campus of Quaid-i-Azam University in Islamabad on 19th April, 2012, the home of a major state university amid pleasant surroundings, was a delightful place for the conference.

There were extensive contributions from about 550 participants including students, faculty members, and professionals from Isfahan University of Iran, University of Punjab (Lahore), Government College University (Lahore), Beaconhouse National University (Lahore), Lahore College for Women University, Lahore University of Management Sciences, Institute of Business Management (Karachi), International Islamic University (Islamabad), Bahaud-din-Zakaria University (Multan), Karachi University, Islamia University (Bahawalpur), Hazara University's Mansehra Campus, Hamdard Institute of Management Sciences, Bahria University, National University of Science and Technology, School of Administrative Sciences at Quaid-i-Azam University, University Institute of Management Sciences of PMAS, Arid Agriculture University, University of Gujrat, University of Sargodha, Peshawar University and the postgraduate colleges of Islamabad and Rawalpindi.