Estimated probabilities of a naive user randomly finding online cognitive behavioural therapy (CBT) from four websites where a knowledgeable user could find CCBT in three clicks
| Website | Number of choices available at each level (click) | Probability of finding online free access CBT | ||
| Level 1 | Level 2 | Level 3 | ||
| RCPsych | 7 | 20 | 1 in 140 | |
| http://www.rcpsych.ac.uk/mentalhealthinfoforall/problems/depression/depression.aspx | ||||
| NHS Choices | 21 | 6 | 15 | 1 in 1890 |
| http://www.nhs.uk/Conditions/Depression/Pages/Introduction.aspx | ||||
| Patient.co.uk | 12 | 36 | 7 | 1 in 3024 |
| http://www.patient.co.uk/health/Depression.htm | ||||
| Net Dr | 24 | 8 | 18 | 1 in 3456 |
| http://www.netdoctor.co.uk/depression/index.shtml | ||||
Websites are shown in order of ease of finding online free access CBT (website names hyperlinked).