Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Eric's career includes extensive work in ...

Physicists have known for decades that the process of observing and measuring phenomena changes those very phenomena—the so-called “observer effect." It does not even matter whether the “observer” is ...

Data from a variety of sources are used to explore the relation between emotions and cognitions. Instead of positing the relation between cognitions and emotions, we explore the variety of ways that ...