Final answer:
Konrad Lorenz demonstrated the concept of Imprinting, which is a critical behavioral phenomenon observed in young animals and has implications for understanding human psychological development.
Step-by-step explanation:
Konrad Lorenz is renowned for demonstrating the concept of Imprinting during his work with animals. Imprinting is a form of learning in which a very young animal fixes its attention on the first object with which it has visual, auditory, or tactile experience and thereafter follows that object. In Lorenz's work with geese, he found that they would follow him as if he were their mother, as he was the first moving object they saw after hatching. This concept can be related to early human psychological development as it shows the significance of early bonds and interactions in shaping behavior.
In summary, while Harry and Margaret Harlow's work with rhesus monkeys highlighted the importance of social comfort over sustenance, and Watson and Rayner's experiments with Little Albert illustrated stimulus generalization, it was Konrad Lorenz who is notably associated with the concept of imprinting in animal behavior.