Describir: Theories of perception and the concept of structure :

 ______    _    _     ______     ___      _  _     ______   _    _    _    _   
|      \\ | || | ||  /_   _//   / _ \\   | \| ||  /_   _// | || | || | || | || 
|  --  // | || | ||    | ||    | / \ ||  |  ' ||   -| ||-  | || | || | || | || 
|  --  \\ | \\_/ ||   _| ||    | \_/ ||  | .  ||   _| ||_  | \\_/ || | \\_/ || 
|______//  \____//   /__//      \___//   |_|\_||  /_____//  \____//   \____//  
`------`    `---`    `--`       `---`    `-` -`   `-----`    `---`     `---`