Various on -
line dating sites claim that their methods for pairing individuals produce more frequent, higher
quality, or longer lasting marriages, but the evidence underlying the claims to
date has not met conventional standards of scientific evidence including: (i) sufficient methodological details to permit independent replication; (ii) open and shared data to permit a verification of analyses; (iii) the presentation of evidence through peer - reviewed journals rather than through Internet postings and blogs; (iv) data collection
free of artifacts, such as expectancy effects, placebo effects, and confirmatory biases by investigators; and (v) randomized clinical trials (3, 9).
Be sure that completely
free on -
line dating sites, as a rule, provide low
quality services, so paying a fee for the effective work is normal.)