What is “maternal deprivation”? What research methods did he use? What did he do? Bowlby’s theory of maternal deprivation How many participants did he study? What did he find out? How valid is his study/findings? is his data reliable? Is there any bias? Why is his study called a Natural experiment? Who’s research supports Bowlby’s theory? 1. 2. What is the difference between privation and deprivation?