The University awarded honorary doctorates to four distinguished individuals at the graduation ceremonies last week.
Philip Johnson-Laird is the Stuart Professor of Psychology at Princeton University and the author of several renowned books on human reasoning and cognition.
Professor Johnson-Laird was a visiting member of the Institute of Advanced Study at Princeton in 1971. From 1973 until 1981 he was on the faculty at Sussex in the Laboratory of Experimental Psychology. He then moved to the Medical Research Council's Applied Psychology Unit in Cambridge and returned to Princeton in 1989.
His recent research has focussed on functional magnetic resonance imaging (fMRI) to examine the regions of the brain underlying deductive reasoning.
Professor Georgina Mace, Director of the Natural Environment Research Council's Centre for Population Biology at Imperial College, is a leading authority in conservation biology.
Professor Mace began her academic career with a BSc in zoology, followed by a DPhil at Sussex on the evolutionary ecology of small mammals. She worked at the Smithsonian Institution in Washington DC, at the University of Newcastle and at University College London before joining the Zoological Society of London, where from 2000 until 2006 she was Director of Science and Head of the Institute of Zoology.
Sir Nicholas Stern carried out the most comprehensive review ever on the economics of climate change. Published in October 2006, the influential review was commissioned by the Chancellor of the Exchequer.
Sir Nicholas is a former chief economist for the World Bank and for the European Bank for Reconstruction and Development.
Before 1994, Sir Nicholas' roles were mostly academic: he taught and researched at a number of institutions in the UK, USA, France, India and China. He has now returned to academia as a professor of at the London School of Economics.
His research and publications have focused on economic development and growth, economic theory, tax reform, public policy and the role of the state and economies in transition.
Polly Toynbee is regarded as one of Britain's foremost opinion makers. Currently the political and social commentator of the Guardian, and former social affairs editor of the BBC, she is also the author of several books.
Ms Toynbee, who lives in Lambeth, has a close association with Brighton and is chair of the Brighton Dome and Festival.