Question

Some scientists propose that thumb sucking in children is a habit which is developed at random, and a recent theory suggests that it is neurologically and genetically based. What is the main argument of the recent theory about thumb sucking in children?

1) Thumb sucking in children is a habit developed due to random factors.
2) Thumb sucking in children is neurologically and genetically based.
3) Thumb sucking in children has no specific cause.
4) Thumb sucking in children is a learned behavior.

Answer 1

The recent theory proposes that (2) thumb sucking in children is based on neurological and genetic factors, relating it to innate reflexive behaviors such as the sucking and grasping reflexes crucial for an infant's survival.

Step-by-step explanation:

The main argument of the recent theory about thumb sucking in children is that it is neurologically and genetically based. Contrary to the idea that it is a habit developed due to random factors, this theory suggests that thumb sucking is an innate behavior, akin to the sucking and grasping reflexes observed in newborns.

These reflexes, such as the sucking reflex, the grasp reflex, and the rooting reflex, are important for a baby's survival, as they facilitate feeding and promote a baby's ability to find nourishment from the mother's nipple. The theory posits that thumb sucking is an extension of these natural reflexive behaviors, potentially influenced by neural development and genetic factors.