44 thieves study is flawed as Bowlby carried out family interviews and assessments for affectionless psychopathy
Left open to bias as he knew which teenagers he expected to show signs of psychopathy
Other evidence asw
Influenced by the findings of Goldfarb's research on the development of deprivedchildren in wartimeorphanages
Problems of confounding variables as the children experienced trauma, institutional care + prolonged separation from their caregivers
Sources of evidence had serious flaws wouldn't be taken seriously as evidence now
COUNTERPOINT:
A new line of research has provided some modest support for the idea that maternal deprivation can have long-term effects
Lévy et al.(2003) showed that separatingbabyrats from their mother for as little as a day had a permanent effect on their social development though not other aspects of development.
This means that, although Bowlby relied on flawed evidence to support the theory of maternal deprivation, there are other sources of evidence for his ideas.
X
idea of a criticalperiod
Bowlby damage was inevitable if a child had not formed an attachment in the first 2 1/2 years of life
Critical period
However evidence suggests that good qualityaftercare can prevent most or all of this damage
IE Koluchová reported case of CzechTwins
Experienced severe physicalabuse from of 18 months-7 years old
Severely damaged emotionally by their experience they received excellent care and by their teens they had recovered fully
Lasting harm is not inevitable even in cases of severe privation 'critical period' is better seen as a 'sensitive period