A child's intelligence is measured by intelligence tests. These are a series of different tasks that the child has to solve at a certain age.
There are many factors that affect the development of intelligence in children, these are some of the most important.
The infant's first signs of intelligence can be observed after its behavior, expressed primarily in motor and later in speech.
Intelligent behavior is adaptability to change when one reaches a conclusion in a situation of emergence. Тhe same principle goes for children's.