The terry cloth mother refers to a surrogate mother figure in Harlow's experiment that was made of soft terrycloth fabric.
The "cloth mother" concept is rooted in attachment theory, which is associated with developmental psychology. It emphasizes the importance of a caregiver's warmth and comfort for an infant's emotional development.
This term originates from Harry Harlow's 1950s experiments on attachment with rhesus monkeys, who preferred a cloth-covered surrogate mother over a wire mother that provided food, demonstrating the importance of secure attachment and contact comfort.