| Term | Definition |
| OCD | obsessive-compulsive disorder, this is when obsessions compel someone to engage in a particular action |
| Somatoform disorders | this occurs when a person manifests a psychological problem through a physiological symptom |
| hypochondriasis | this is when a person complains of frequent physical discomfort for which doctors cannot explain |
| conversion disorder | this is when a person reports the existence of a severe physical problem for no biological reason |
| dissociative disorders | these disorders involve a disruption in conscious processes |
| psychogenic amnesia | this is when a person cannot remember things and no physiological basis for the disruption in memory can be identified |
| DID | dissociative identity disorder, this is called multiple personality |
| Aaron Beck | he believed that depression results from unreasonably negative ideas that people have about the cognitive triad |
| cognitive triad | oneself, one's world, and one's future |
| Martin Seligman | he came up with the idea of learned helplessness |
| disorganized schizophrenia | people with this experience odd uses of language |
| neologism | making up one's own words |
| clang association | stringing together series of nonsense words that rhyme |
| flat affect | having no emotional response |
| inappropriate affect | having inappropriate responses to situations |
| paranoid schizophrenia | people with this engage in odd movements |
| undifferentiated schizophrenia | people with this exhibit disordered thinking but no symptoms of other schizophrenia |
| dopamine hypothesis | the idea that high levels of dopamine are associated with schizophrenia |