| Examples of hypotheses (testable statements) | Non-testable statements (could be modified, so as to be testable) |
| Dogs are more social than are cats. | All first-degree murderers should be executed. |
| Some people experience text messages as a "voice" inside their head. | Sirena does not need to attend class because the lectures are all online. |
| Capital punishment is a deterrent to crime. | You shouldn't cram for exams. |
| Students who attend class do better than students who do not attend class. | Boys in junior high should be required to take home economics. |
| Drinkers are more likely to abuse their spouses than is the case for non-drinkers. | As I have gotten older, I find that I can't do more than one thing at a time. |
| Preadolescents with a history of secure attachment are more socially competent than those with insecure attachment histories. | I don't eat chocolate because it makes my face break out. |
| Animals can detect impending earthquakes ahead of time. | |
| In general, women will show a greater tendency to exhibit communication patterns of social interdependence (such as references to others, self-reference, supporting references, and emotional discourse) than will men. | |
| Hypericum (St. John's Wort) reduces depression. | |
| Traditional men disclose less to a girfriend than do nontraditional men. | |
| Eating chocolate results in pimples. | |
| Spaced study is better than cramming for exams. | |
| Tolerance of others increases with education level. | |
| Crime levels are higher during a full moon. | |
| The ability to multi-task declines with age. | |
| Teenage boys who have taken a course in home economics will exhibit significantly less sex-role-stereotyping behavior than those who have not. | |
| Schizophrenic patients with three or more hospital admissions in a year have more stressful family environments than a comparison group of diagnostically similar patients who were admitted to the hospital less frequently. |