'प्रभाव का नियम' (Law of Effect) किसके द्वारा प्रतिपादित किया गया था?

Which psychological theory of learning is based on the 'sudden flash of understanding' or 'Aha!' experience, as demonstrated by Wolfgang Kohler's experiments on Sultan the chimpanzee?

Which of the following principles asserts that learning happens instantly when a stimulus and response occur together, without needing gradual reinforcement over multiple trials?