Psychology Today's online self-tests are intended for informational purposes only and are not diagnostic tools. Psychology Today does not capture or store personally identifiable information, and your ...

A personality test is an instrument designed to elicit a response that may reveal someone's "personality"—that is, their patterns of behaving and thinking across different situations. These tests can ...

Where mood disorders can cause temporary or fluctuating changes in mood, personality disorders cause symptoms that remain consistent over time and across a range of situations. For example, bipolar ...

Paranoid personality disorder involves a persistent suspicion and mistrust of other people. This can lead to difficulties with functioning socially and in relationships. Treatment for paranoid ...

Is it possible to spot personality dysfunction from someone's everyday word use? My colleagues and I have conducted research that suggests you can, and often sooner than you might expect. Whether in a ...