Each day we experience new things and situations, and these experiences change us temporarily and permanently. Psychologists call these changes learning, and have studied the psychological processes that sustain it since the time of Pavlov and John B. Watson. Memory and Cognition . We would be literally lost without our memories. Testing and intelligence .
People are surprisingly similar to each other.
We all eat, drink, think deep thoughts, plan excursions, and seek our goals. Some are taller than others. Some are more artistic than others. Some might even be more intelligent than others. Psychologists have long been intrigued by individual differences, and they have developed an array of tests to try to measure these differences.