2015年の研究を紹介します。出会ってすぐに交際を開始したカップルでは外見的魅力の「釣り合い」が強く見られた一方、知り合いの期間が長いカップルでは外見の釣り合いが有意に低下することがわかりました。
A study of 167 couples included measures of how long partners had known each other before dating and whether they had been friends before dating, as well as coders’ ratings of physical attractiveness. As predicted, couples revealed stronger evidence of assortative mating to the extent that they knew each other for a short time and were not friends before initiating a romantic relationship.
Leveling the Playing Field: Longer Acquaintance Predicts Reduced Assortative Mating on Attractiveness
つまり、時間をかけた関わりの中で、初期の「外見フィルター」が無効化されていくことが示されました。