Yandex from the report on the CIKM2013 have become publicly known following behavioral factors of ranking of Yandex:
QueryDomCTR is the average CTR of all documents on this query domain
QueryUrlCTR is the average CTR on this query to a particular instrument.
QDwellTimeDev — standard deviation (deviation) of the average time spent on the document on request.
QDwellTime is the average time a visitor on the document on request.
AvSatSteps — the average number of satisfied steps on the site. He is moving on after 30 seconds the internal link in the document.
AvDwellTime is the total average time visitors on the document for various search terms.
DwellTimeDev — standard deviation (deviation) time spent on the site.
90thDwellTime is the top decile, the 90th percentile of the average time spent on the site.
10thDwellTime is the bottom decile average time spent on the site.
TimeOnDomain is the total time spent on the site. All requests for any documents.
CumulativeDev — standard deviation (deviation) of the average time spent on the site
Personally, I absolutely cannot understand the emergence of PF QueryDomCTR-factor, beyond the request document.
90thDwellTime and 10thDwellTime are obviously factors for “cutting” random transitions and twisting PF, and probably out of doorways.