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Edward Thorndike

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Edward Lee Thorndike was a famous American psychologist. He spent almost his entire career at Teachers College at Columbia University. His work helped create the science of how we learn. He is well known for his theory of connectionism. This idea explains how different things in the mind become linked together.

Original "Puzzle Box" Apparatus Design
Original "Puzzle Box" Apparatus Design

Thorndike also helped build the foundation for educational psychology. This is the study of how people learn in school. His ideas still help teachers in classrooms today.

Thorndike studied how living things learn by using special tools. He built puzzle boxes to test animals like cats.

Original "Puzzle Box" Apparatus Design
Original "Puzzle Box" Apparatus Design

These boxes were about 20 inches long and 12 inches tall. A cat inside the box had to press a lever or a button. Doing this would lift a weight and open the door. Once the door opened, the cat received a reward, usually food. This process is called instrumental learning. It means learning happens because an animal does an action to get a result.

Thorndike wanted to see if animals learned by watching others. He let some animals watch others escape the box. However, he found no difference in how fast they learned. This showed that animals learn through trial and error. They try many different things until one works. He used a learning curve to track this progress. A learning curve is a graph showing how much time it takes to finish a task. The graph often looks like an S-shape. The animals start slow but get faster as they practice.

Thorndike was born in Williamsburg, Massachusetts. His father, Edward R. Thorndike, was a Methodist minister. Edward went to Wesleyan University and later earned a degree from Harvard University. In 1898, he finished his PhD at Columbia University. He married Elizabeth Moulton in 1900, and they had five children. One of his daughters, Frances, became a mathematician.

Original "Puzzle Box" Apparatus Design
Original "Puzzle Box" Apparatus Design

He was a very important scientist in the 20th century. A survey in 2002 ranked him as the ninth-most cited psychologist of that century.

Many of his ideas connect to things we see every day. He created the law of effect. This law says that behaviors followed by good results are likely to happen again. He also had a law of exercise. This says that using a skill makes it stronger. If you do not use it, the skill becomes weaker. He also spoke about different kinds of intelligence. These include social intelligence for talking to people and mechanical intelligence for using tools.

Original "Puzzle Box" Apparatus Design
Original "Puzzle Box" Apparatus Design

His work helps us understand how our brains connect new information to old habits.

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File:Original "Puzzle Box" Apparatus Design.png
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