Study the perception of the world from the viewpoint of an animal. A 2003 article from TIME magazine discusses the perception of sheep in slaughterhouses, what they perceive and what we think they perceive. Focus on one animal or many animals and select how animals in the wild perceive the world in contrast to those in captivity or in a human's home.
In a 2009 article in Seed Magazine, author Greg Boustead writes about an artist who uses his being color-blind to create a different perception of art and architecture. For a thesis on perception, research the different ways people with visual impairments redesign the world around them. Do they perceive their impairments as handicaps or as special gifts? Focus on visual artists and architects to find physical examples of their creations based on the different ways in which they perceive the world, and draw out ways in which people with "normal" vision can benefit from this different perspective.
In the 21st century, people deal with a great deal of daily noise. Are we learning to perceive this noise differently or is it getting the better of us? In a 2007 Guardian article, columnist Alok Jha discusses a World Health Organization study that blames chronic noise exposure for 3,030 deaths out of 101,000 recorded coronary heart disease deaths in 2006. In the article scientist, Deepak Prasher states, "Until now, noise has been the Cinderella form of pollution and people haven't been aware that it has an impact on their health." For your thesis on perception, study how people think they perceive noise compared with how they actually perceive noise and draw some conclusions about how our perceptions are changing in this realm and what this change may means to our future.