Why eHarmony Should Be More Like Google

by David Evans on September 30, 2008 in Personality Testing

A while back Fernando Ardenghi took issue with my statement “eHarmony is innovating, continuously updating the site and matching algorithm.” Fernando argues that as it updates its matching algorithm, eHarmony should recalculate compatibility between prospectives mates in its entire big database. He seems to be saying that dating sites won’t re-index their databases in order to take advantage of improved matching capabilities.

All of a sudden it hit me. Dating site compatibility assessment systems need to be more like Google.

Think about the Google web index, which is updated every so often to improve search results. When Google publishes a new index, people who are negatively affected in the organic search results tend to get upset. If you’re a company spending thousands of dollars a month in SEO fees to show up on the first page of Google’s search results and all of a sudden you’re on page six, you’re going to understandably freak out.

I like to think of eHarmony as being somewhat like Google, in that they are very secretive about their matching system, it evolves over time, and for a certain number of singles, works well. The main difference is that we know a lot more about Google’s indexing systems than we do eHarmony.

eHarmony is slowly becoming more transparent though a series of blogs and the eHarmony Labs. (although the labs blog hasn’t been updated in a month.) I for one would like to see them talk more about the matching system. How does it work, how has it evolved, what are they learning and how is that knowledge fed back into the matching system? Part of the beauty of eHarmony is that they do most of the work, but still, I’d like to know what my $50 is doing for me each month. I’m all for protecting intellectual property, but part of me thinks increased transparency into the matching process would actually be more helpful.

The marketing people at eHarmony are grinning right now, they know it’s all about ad spend. As long as more people visit and become paying members, the “better” the service becomes. If there are more members, more people will get married, regardless if the matching system improves or not.

And pretty soon, They’ll have to answer to the SEC and then it’s all about preserving shareholder value. That’s when eHarmony jumps the shark. They’re really in a difficult place right now if you think about it. Visitors are basically flat from a year ago and I assume they are spending even more money on marketing.

If they go on this acquisition spree that everyone is talking about, are they going to buy a site for the traffic, the revenue or the cross-sell, like Match promoting Chemistry (but not the other way around?)

What happens if/when eHarmony tweaks their matching system? Do people that are potential matches get disconnected? Is there a feedback loop in place where someone says, “whoa, we just lost 134,000 matches based on that last algorithm change.” Are the matches at eHarmony improving over time, staying the same, or getting worse? How can we measure improvement? I don’t want to rely on an increase in marriages per day, it’s not nuanced enough to use as a realistic measurement.

Dr. Houran and others talk a lot about the science of matching, but it really comes down to math when you’re talking about matching millions of members. What is that threshold for “connect them they are a great match” and being right on the line between a match and not? My online dating neurosis occurs when I think about the women that I’m not connecting with because my dating services are not putting them in front of me for some reason or another. Shudder. This is the stuff that drives me crazy, the potential for missed matches. My personal example on Match is when I say I want kids, and I see a million women, but if I say I’m not sure about kids, the dating pool dries up considerably. How many of those women that say they want two kids are just saying that and would be fine without kids? I meet a TON of women in that situation.

I would love to hear from someone at eHarmony who is allowed enough leeway to talk about how they run these amazingly complex matching systems, fascinating stuff.

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{ 6 comments… read them below or add one }

Fernando Ardenghi September 30, 2008 at 3:25 pm

Any serious online dating site offering compatibility matching should be more like … Coca Cola than Google.
The Coca Cola formula is so good, there is no need to change it.
(there were only minor corrections through last 100 years, and there are local versions with sugar or corn syrup.)

Kindest Regards,

Fernando Ardenghi.
Buenos Aires.
Argentina.
ardenghifer@gmail.com

Reply

David Evans September 30, 2008 at 3:57 pm

Coke has tried several different styles, some work, some didn’t.

I get your point about localism, but sugar or corn syrup is a lot different than adjusting a testing mechanism to reflect local cultures.

At least Coke has an ingredient label!

I disagree 100% that testing should be static and never change. Why avoid making the test better (Hence my Google reference.) the science you guys reference is less than 75 years old and how long have we been on this planet? Like you have it figured out already?

Don’t forget, if you put a nail in a bottle of coke, in a week it has disappeared :-)

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Fernando Ardenghi September 30, 2008 at 6:33 pm

“My online dating neurosis occurs when I think about the women that I’m not connecting with because my dating services are not putting them in front of me for some reason or another ….. I meet a TON of women ….”

Great News!!!
You are over connected with more women than you should!!! You are not missing any of them because actual online dating sites offering compatibility matching methods could reach “as low as” 3 / 4 persons high compatible per 1,000 persons, so in a 1,000,000 women database, you have as many as 3,000 / 4,000 women to contact (nearly at the same time).

I think you will want to receive an email like this:
“Hi Dave.
Over 1,000,000 million women database, here is the list of the 12 more compatible with you. Notice that woman#1 is the most compatible but she could be more compatible with other men right now.
woman#01 is 95.58476277% compatible
woman#02 is 95.56224356% compatible
woman#03 is 95.52998273% compatible
woman#04 is 94.18354278% compatible
woman#05 is 93.00453871% compatible
woman#06 is 93.00007524% compatible
woman#07 is 92.99738452% compatible
woman#08 is 92.37945551% compatible
woman#09 is 92.29779173% compatible
woman#10 is 92.27114287% compatible
woman#11 is 92.19515551% compatible
woman#12 is 92.12249558% compatible”

Many sites like YahooPersonals (WeAttract), Chemistry and others could receive feedback from their clients/users to make minor changes or slightly corrections, but not great improvements nor they recalculate compatibility between prospectives mates in its entire big database. They are still providing as many prospective partners as before.

If eHarmony really wants to improve its matching method, its owners should discard Dyadic Adjustment Scale and adopt a high precision quantitative method to compare quantized patterns like the one I had invented.

Kindest Regards,

Fernando Ardenghi.
Buenos Aires.
Argentina.
ardenghifer@gmail.com

Reply

Markus October 1, 2008 at 2:09 am

No one cares how compatible you are with someone on the other side of the world, or country. No dating site is ever going to take that approach unless they want to go bankrupt. Dating is local, and that is never going to change.

Reply

Alex October 19, 2009 at 12:32 pm

I’m totally agree with Markus.Only local could work ,and all of this compatibility stuff never works , just waisting time

Reply

David Evans October 19, 2009 at 3:52 pm

“all of this compatibility stuff never works”
Did you carve that on a rock while driving your horse and buggy?

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