There are many factors involved in juvenile delinquency. Bowlby acknowledged this, however it wasn’t included in the theory. Farrington ( 2009 ) conducted a longitudinal study and found that the most important risk factors for offending at a young age were family history of criminality, daring or risk taking personality ( Eysenck ), low school attainment, poverty, poor parenting ( psychodynamic ). This shows that that more can be included in the approach.