Clay is hiding under his blanket so that he is invisible. he believes that if he cannot see his parents they cannot see him. clay is demonstrating:

Egocentrism

Explanation:

 Egocentrism is one of the type of cognitive development that refers to the children inability to differentiate the given situation with the others point of views. It is the lack of see the situation and also differentiate between the others and self points.

 The ego-centrism child believes that that they are main center of attraction and they always assume that the other person thought the same they thought about the given situation.

The ego-centrism is the lack of self awareness and also lack of understanding. Therefore, clay is demonstrating about the ego-centrism problem.

"harry t. moore (1905-1951) – civil rights activist, leader, and the first martyr of the civil rights movement. fannie lou hamer (1917–1977) – leader in the american civil rights movement; co-founder of the national women's political caucus and freedom democratic party. james farmer (1920–1999) – congress of racial equality."