Five-month-old babies can’t be judged to be smart, but are generally assessed at this stage of neuropsychological development through some common manifestations, such as being able to stand up straight with the help of their parents at home and producing words and syllables, and other manifestations of motor and language development. 1. Motor development. 5-month-old babies are able to stand up gradually with the help of their parents due to the gradual improvement of their motor development. At the same time, they are able to grasp toys with both hands, but at this time they are not yet able to sit up, turn over, or crawl. 2. Language development. Usually, due to the gradual improvement of language development, they are able to pronounce words and syllables by themselves, but they are not able to recognize the faces of acquaintances and strangers, so infants will not be afraid of people other than their parents at this time. Secondly, they are not able to call their parents or understand their own names. Parents are often advised to help their child’s motor development when the child is 5 months old, for example, to help the child to stand up when there is time to do so. It is also important to train the child’s ability to grasp objects, and to help the child develop language development, such as articulation.