Eucational psychologists have identified several principles of learning, also referred to as laws of learning, which seem generally applicable to the learning process. These principles have been discovered, tested, and used in practical situations. They provide additional insight into what makes people learn most effectively. Edward Thorndike developed the first three "Laws of learning:" readiness, exercise, and effect. Since Thorndike set down his basic three laws in the early part of the twentieth century, three additional principles have been added: primacy and recency, and intensity.