In Flowers For Algernon What was the first thing that charlie refused to do for the doctors?

In "Flowers for Algernon," the first thing Charlie refused to do for the doctors was to participate in the repetitive tests that he found humiliating. Initially compliant and eager to please, he began to recognize that the experiments were dehumanizing and questioned their purpose as his intelligence increased. This marked a significant turning point in his journey toward self-awareness and dignity.