| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| evolutionary theory of sleep psychology | 1.14 | 1 | 2310 | 18 | 39 |
| evolutionary | 0.81 | 0.7 | 8048 | 58 | 12 |
| theory | 1.69 | 0.2 | 774 | 94 | 6 |
| of | 1.85 | 0.2 | 2162 | 11 | 2 |
| sleep | 0.77 | 0.7 | 2459 | 48 | 5 |
| psychology | 1.13 | 0.2 | 9372 | 17 | 10 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| evolutionary theory of sleep psychology | 1.22 | 1 | 7674 | 67 |
| evolutionary hypothesis about sleep | 1.62 | 0.6 | 2671 | 23 |
| theories of sleep psychology | 0.07 | 1 | 9939 | 78 |
| evolutionary function of sleep | 1.55 | 0.1 | 8893 | 71 |
| the evolution of sleep | 1.37 | 0.2 | 449 | 95 |
| evolutionary insights into sleep evolution | 1.48 | 0.6 | 6457 | 33 |
| adaptive theory of sleep psychology | 1.98 | 0.2 | 600 | 77 |
| evolution of sleep in humans | 1.47 | 0.8 | 3288 | 3 |
| the origins and evolution of sleep | 1.08 | 0.7 | 8731 | 67 |
| what theories explain the function of sleep | 0.06 | 0.8 | 6393 | 88 |
| sleep theories ap psychology | 1.38 | 0.5 | 3943 | 11 |
| the role that sleep plays in evolution | 0.22 | 0.6 | 5262 | 89 |
| theories of why we sleep | 1.39 | 0.2 | 8630 | 64 |
| two theories explaining the purpose of sleep | 0.64 | 0.5 | 4123 | 68 |
| theories about sleep duration | 0.9 | 0.2 | 5608 | 26 |
