Final answer:
Haptics is the form of nonverbal communication involving touch, significant in child development for emotional bonding and often lessened in dysfunctional families.
Step-by-step explanation:
The type of nonverbal behavior that refers to touching and is related to how babies in dysfunctional families are touched less often and less affectionately compared to those in healthy families is called haptics. Haptics is a form of nonverbal communication involving touch to convey a message, which can include how often and in what manner someone is touched or held. This form of communication is crucial for emotional development and bonding, especially in the early stages of a child's life.