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| Questionnaire Name | Median Length | Participants |
|---|---|---|
| Eye colour survey | ... | ... |
| Eye colour survey | ... | ... |
| Eye colour survey | ... | ... |
| Self | ... | ... |
| Relationship Behavior | ... | ... |
| Parenting | ... | ... |
| Competition among fellow men | ... | ... |
| Competition among fellow women | ... | ... |
| Hormones & Menstrual Cycle | ... | ... |
| Adult Sibling Relationship Questionnaire II | ... | ... |
| Adult Sibling Relationship Questionnaire I | ... | ... |
| Attitudes | ... | ... |
| Ranking Mate Preferences | ... | ... |
| Mate Preferences | ... | ... |
| Life History Questionnaire | ... | ... |
| Altruism | ... | ... |
| Personality | ... | ... |
| Personality traits | ... | ... |
| Empathizing - Short Form | ... | ... |
| Systemizing - Short Form | ... | ... |
| Drive | ... | ... |
| Obsessive Behaviour | ... | ... |
| Future Discounting | ... | ... |
| Personality | ... | ... |
| Family | ... | ... |
| Demographics | ... | ... |