Konrad Lorenz demonstrated which concept that may be used to understand early human psychological development?

The concept demonstrated by Konrad Lorenz that is essential for understanding early human psychological development is imprinting. Lorenz's work with ducklings illustrated how certain animals have a critical period shortly after birth during which they form attachments to the first moving object they encounter, commonly their mother. This process of imprinting is crucial for survival, as it influences the offspring's social behavior and interactions throughout their lives.

In human development, the concept of imprinting extends to the attachment theory, which posits that early interactions with caregivers significantly shape an individual's emotional and relational behaviors in later life. Lorenz's findings highlight the importance of early experiences, suggesting that infants are predisposed to seek connection and security, thereby influencing their social and emotional development.

Other concepts listed do not pertain to the critical period of attachment formation in the same way. Sensory deprivation focuses on the effects of lack of sensory input and its impact on development. Altruism relates more to selfless behavior and moral development, while stress syndromes pertain to responses to traumatic experiences rather than the formative attachment process demonstrated by imprinting.