Answer: Temperament
Step-by-step explanation:
Temperament is terms of psychology is defined as different emotions and reaction that a person tends to show in situations .Behavior of the person is studied in different events.
Gender effect on temperament is the study that defined that a person has different behavioral response in case of male and female personality.This reaction is caused due to different emotion and feeling a person persist for different gendered people.
Therefore,the reaction of mothers towards crying girl child and crying boy child is different as gender is playing role of producing different emotion in mother's mind as thus different results are obtained.