weaknesses/criticisms

• lacks internal validity 


  -the artificial mothers varied the 2 hears were different

  the 2 hears were different

  -cofounding variable

  -monkeys could've preferred cloth monkey because it had a more attractive head

  -
• cannot generalise to humans


  -humans are capable of more complex thought processes

  -human behaviour governed by conscious decisions
• ethical issues 


  -study created lasting emotional harm to monkeys

  > found it difficult to form relationships with peers

  -could be argued the experiments necessary as could never be carried out on humans?

  > rely on rare case study of Genie who was abandoned in a room in her house for first 13 and a half years of her life