Insightful theory of learning is given by-

Wolfgang Kohler, a German psychologist, proposed the ‘Insightful Theory of learning’.

Key Points

According to Kohler, insight doesn't take place with trial & error, rather than it is a sudden reorganization of experience.

‘Insightful Theory of learning’ implies that:

• The solution to a problem arrives ‘all of a sudden’ flash of insight when a person is struggling. 
• Insight enhances an individual's ability to perceive and understand something or someone instinctively.
• Insight doesn't rely on behavior or observation, it is the sudden realization of a problem's solution using intuition.

For this, Kohler demonstrated the following experiment:

• He kept chimpanzees in a closed room where food was kept out of their reach, and items like boxes, stick was there.
• The chimpanzee would roam inside the room to reach the food.
• They would ‘suddenly’ stand on a box and use the stick to bring food close to them.
• It should be noted that it was not the result of trial and error instead, the chimpanzee suddenly came up with the idea to use boxes and stick.

Hence, we conclude that the Insightful Theory of Learning was given by Kohler.