Correct Answer: D

Rationale: According to Jean Piaget, equilibrium is the balance between what children already know (internal structures) and the new information they encounter. Imitation (choice A) is not directly related to this concept. Adaptation (choice B) involves adjusting to new information and is part of Piaget's theory, but it does not specifically refer to the balance between internal structures and external information. Cognition (choice C) is a broader term that encompasses mental processes, including thinking, learning, and problem-solving, but it is not specifically about the balance between internal structures and external information as equilibrium is.

Correct Answer: B

Rationale: According to Erikson's theory of psychosocial development, despair is the stage that aging adults face when they reflect on their life and feel they have not achieved their goals, with little time left to correct their mistakes. Mistrust (choice A) is associated with infancy, stagnation (choice C) with middle adulthood, and isolation (choice D) with young adulthood, and are not relevant to the described scenario of aging adults reflecting on their life decisions.

Correct Answer: B

Rationale: According to Erikson's theory of psychosocial development, the major personality attainment of adolescence is identity. During adolescence, individuals go through a stage called 'Identity vs. Role Confusion,' where they explore different roles and develop a sense of self. Trust (choice A) is associated with the first stage of Erikson's theory, autonomy (choice C) is linked to the toddler stage, and intimacy (choice D) is a key aspect of the young adulthood stage.

Correct Answer: C

Rationale: By age 2, children are capable of adjusting their speech to fit the age of their listeners, showing early social cognition. Choice A is incorrect because taking turns in face-to-face interaction typically develops later in childhood. Choice B is incorrect as the ability to infer a speaker's indirectly expressed intention is a more advanced skill not typically seen at age 2. Choice D is also incorrect as children at age 2 are not developmentally ready to adjust their speech based on the social status of their listeners.

Correct Answer: A

Rationale: Vygotsky viewed make-believe play as the ideal social context for fostering cognitive development in early childhood. Make-believe play encourages children to explore various roles and scenarios, promoting cognitive and social development. Sensorimotor play focuses on physical interactions with the environment, while block play involves building and construction activities. Parallel play refers to children playing alongside each other without direct interaction, which is not the type of play Vygotsky emphasized for cognitive development.