Final answer:
Self-regulation, joint attention, and perceiving goal-directed behavior are important social cognitive accomplishments established at the end of the first year.
Step-by-step explanation:
Social Cognitive Accomplishments at the End of the First Year:
- Self-regulation: By the end of the first year, infants begin to develop the ability to regulate their emotions and behavior.
- Joint attention: Infants also become capable of sharing their attention with others and following another person's gaze or point.
- Perceiving that the behavior of others is goal-directed: At the end of the first year, infants start recognizing that other people's actions are purposeful and goal-oriented.
These achievements are scaffolded by the sensorimotor stage, the first stage in Piaget's theory of cognitive development. During this stage, an infant learns about the world primarily through their senses and motor interactions with the environment.