Final answer:
According to Kenneth Dodge, the first step in processing social information in children is the sensorimotor stage, which lasts from birth to about 2 years old. During this stage, children learn about the world through their senses and motor behavior, and develop object permanence.
Step-by-step explanation:
The first step that children go through in processing information about their social world, according to Kenneth Dodge, is the sensorimotor stage. This stage lasts from birth to about 2 years old and involves children learning about the world through their senses and motor behavior. During this stage, children develop object permanence, which is the understanding that even if something is out of sight, it still exists.