Describir: Theories of perception and the concept of structure :

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