Which of the following research findings was not influential in Bowlby's development of his theory of attachment?
◦ Harlow (1958) found that infant monkeys preferred to spend time with a cloth "monkey mother" compared to a wire "monkey mother."
◦ Vygotsky (1972) found that children learn through social interaction with their parents.
◦ Spitz (1945) found that babies raised in institutions with proper physical care did not form attachments with nurses.
◦ Lorenz (1965) showed that newborn goslings bond to the first thing they see.