Registration for this round started in January 2018 and ended in October 2018.
After discarding bad and invalid entries (for example, those using disposable email addresses), this round had 2958 entries that were matched into 1479 pairs.
The matching survey for this round had 50 personality questions and 20 knowledge questions that were used to compute scores on 13 traits (11 of personality and 2 of knowledge). The goal for matching was to put all persons into pairs so that the similarity in psychological traits between the members of each pair was maximized.
Similarity was measured as the Pearson correlation between the pairs traits. So a similarity score of 1 means that the scores were the exact same, and a score of -1 means that scores were the exact opposite.
The graph below shows the distribution of similarity scores for all the matched pairs that were mailed out this round, versus what similarity scores would have been if the matches had been made at random.
Data from round two has now been deleted from the server to protect user privacy, the email alias system used for people to get in contact with each other will remain up for two more weeks. Last round there were problems with lots of the emails going to spam, hopefully that problem has been corrected. A new version of the matching survey is up and the third matching round is now accepting registration.
I know this round took a while to get finalized; sorry about that. Hopefully in the future I will do better.