I was raised by a lady that was crippled all her life but she did everything for me and she raised me. She washed our clothes cooked our food she did everything for us. I don't think I ever heard her complain a day in her life. She taught me responsibility towards my brother and sisters and the community.
I do believe that there are some universal cognitive tasks that are deep and profound - indeed so deep and profound that it is worthwhile to understand them in order to design our displays in accord with those tasks.