I’m studying and need help with a Psychology question to help me learn.

Please contribute something helpful, beneficial and/or interesting that you have found related to the topic of sensation and perception. Youtube video links, online articles, and other relevant materials are acceptable. Make sure you include a brief explanation of the resource you chose and explain why you found it relevant or useful. Please be conscientious of your contributions and use appropriate discretion. Anything that appears offensive or extreme will be immediately removed and the contributor may be penalized. The same deadline will apply to each of these chapter threads in order to earn the points for that chapter.