Which of the following is NOT one of Erikson's stages of psychosocial development?

The correct choice is learning and exploration, as it does not align with Erikson's established framework of psychosocial development stages. Erik Erikson proposed eight stages that individuals progress through, each characterized by a specific conflict that must be resolved for healthy psychological development.

The stages include trust and mistrust, which focuses on the infant's basic needs being met by caregivers, and identity vs. role confusion, which primarily pertains to adolescents developing a sense of self and personal identity. Another significant stage is intimacy vs. isolation, where young adults explore relationships and emotional connections with others.

In contrast, learning and exploration, while important aspects of human development, are not formally recognized as a distinct stage within Erikson's theory. Thus, this choice stands apart from his well-defined stages.