The reasons for this change are complex, but are due in part to a loss of respect for visual communication in educational settings - whether secondary schools or art colleges.

• 造成此现象的原因是复杂的,一部分原因可归咎于从教学角度来说对视觉交流丧失了原有的尊重,不论是在中学里或是在艺术高等学校。