PAPER "Quantifying the association between personality similarity and marital adjustment .. "

"Are spouses who are more similar in terms of their personalities more satisfied with their marriages?" Short answer, yes.


NEW PAPER
"Quantifying the association between personality similarity and marital adjustment using profile correlations: A cautionary tale"

Profile correlations are sometimes used to quantify personality trait similarity between relationship partners. These coefficients are then used to test whether similar couples are happier couples. The current paper describes several different methods of calculating profile correlations and outlines procedures for testing whether these coefficients are related to marital adjustment in a sample of 1643 couples. There was little evidence that profile correlations were related to marital adjustment after accounting for normativeness (i.e., the degree to which an individual's profile matched the typical personality profile) and when accounting for each individual's personality attributes. Results suggest that researchers using profile correlations should be cautious given that the interpretation and psychological meaning of results often depend on how the coefficients are calculated.

"... research about similarity informs how psychologists evaluate online dating services that often claim personality compatibility is an important ingredient in successful relationships" (I add Actual matching algorithms used by eHarmony, Chemistry, PlentyOfFish and others, even behavioural recommender systems, can not be improved, they need to be discarded NOW.)

The above paper is also related to the paper "Is spousal similarity for personality a matter of convergence or selection?"


First thing I do when receiving any paper is to read the title, then the abstract and check bibliography cited.

In this case I was surprised to see some importants papers not even cited like:

"Only the congruent survive - Personality similarities in couples. Personality and Individual Differences" 2008 Rammstedt and Schupp.

"Personality influences on marital satisfaction: Integrating the empirical evidence using the Actor-Partner Interdependence Model (APIM) model" 2009 Charania and Ickes.

"Personality Similarities Predict Relationship Satisfaction in 23 Countries" Erina Lee, Gian Gonzaga, and Emily M. Maywood (from eHarmony Labs)

"Similarity predicts relationship satisfaction in Brazil" 2011 Erina Lee, Gian Gonzaga.

"Partner Preferences of the Intellectually Gifted" 2012 Pieternel Dijkstra, D. P. H. Barelds et al.

"Relationship Compatibility, Compatible Matches, and Compatibility Matching" 2011 Susan Sprecher.

"Generalization in mate choice copying in humans" 2012 Robert I. Bowers, Skyler S. Place, Peter M. Todd, Lars Penke, and Jens B. Asendorpf.

"Personality, Partner Similarity and Couple Satisfaction: Do Opposites Attract or Birds of a Feather Flock Together?"  2011 Adrienne Kaufman

"Personality similarity between self, partner and parents" 2011 D. P. H. Barelds and Pieternel Dijkstra.

"Perceptions of Ideal and Former Partners' Personality and Similarity" 2010 Pieternel Dijkstra / D. P. H. Barelds.

"Personality similarity, perceptual accuracy, and relationship satisfaction in dating and married couples" 2011 Mieke Decuyper, Marleen De Bolle and Filip De Fruyt.

"It's that time of the month: The effects of hormonal shifts on female mate value, depressive symptomology, and short term mating orientation." 2011 Heather Adams and Victor Luévano.

From the paper "METHODOLOGICAL AND DATA ANALYTIC ADVANCES IN THE STUDY OF INTERPERSONAL RELATIONSHIPS: INTRODUCTION TO THE SPECIAL ISSUE"

At page 413 says: "It is vital for the study of personal relationships, as for any scientific discipline, to develop methodologies that are specifically designed to address the questions posed by the discipline. The articles in this special issue represent an effort in that direction. Perhaps equally important is the need for individuals who are involved in relationships study to learn these new techniques and to apply them in their research. It is also important for investigators to challenge statisticians to create new analytic techniques when existing ones are inadequate. These tasks are left to you, the reader."

That is because I had invented a new quantitative method to calculate similarity.


In compatibility matching algorithms there are 2 steps:
1) to measure personality traits or other variables.
2) to calculate compatibility between prospective mates.

The 3 milestone discoveries of the 2001 - 2010 decade for Theories of Romantic Relationships Development are:
I) Several studies showing contraceptive pills users make different mate choices, on average, compared to non-users. "Only short-term but not long-term partner preferences tend to vary with the menstrual cycle"
II) People often report partner preferences that are not compatible with their choices in real life. (Behavioural recommender systems or other system that learns your preferences are useless)
III) What is important in attracting people to one another may not be important in making couples happy. Compatibility is all about a high level on personality similarity between prospective mates for long term mating with commitment.

Also there is a similarity trilogy between genetic, mate choice and personality based recommender systems.

Personality Based Recommender Systems are the next generation of recommender systems because they perform FAR better than Behavioural ones (past actions and pattern of personal preferences)

WorldWide, there are over 5,000 -five thousand- online dating sites
but no one is using the 16PF5 (or similar) to assess personality of its members!
but no one calculates similarity with a quantized pattern comparison method!
but no one can show Compatibility Distribution Curves to each and every of its members!
but no one is scientifically proven! The only way to revolutionize the Online Dating Industry is using the 16PF5 normative personality test, available in different languages to assess personality of members, or a proprietary test with exactly the same traits of the 16PF5 and expressing compatibility with eight decimals (needs a quantized pattern comparison method, part of pattern recognition by cross-correlation, to calculate similarity between prospective mates.)
High precision in matching algorithms is precisely the key to open the door and leave the infancy of compatibility testing.
It is all about achieving the eighth decimal!
With 8 decimals, you have more precision than any person could achieve by searching on one's own, but the only way to achieve the eighth decimal is using analysis and correlation with quantized patterns.
Without offering the NORMATIVE16PF5 (or similar test measuring exactly the 16 personality factors) for serious dating, it will be impossible to innovate and revolutionize the Online Dating Industry All other proposals are NOISE and perform as placebo.