Psychophysics is the general subject, but going more in depth as to detecting a low threshold of light or sound.
The project should be a general research project, where it provides an overview of the topic and explain its relation to the field of sensation and perception using research articles to illustrate relevant points.
This type of project should include a definition of what the topic is, including what sense (e.g., vision, hearing, etc.) it deals with and why it is important to our perception of the world. It is expected that the project will be well researched, detailed, accurate, and provide current information to adequately describe your topic.
Given that this is a sensation and perception class, try to include an example or a way in which the audience could experience the topic within the project. It needs at least 3 resources that are peer-reviewed journals and not articles.