There’s been a good deal of discussion recently
about the possible effects of neglectful orphanage experiences on children’s
development, with some claims made about damage to brain development in the
proposed “Children in Families First” legislation. A recent publication is
bound to be made grist for this legislative mill, and I would like to go over
some aspects of the study before this happens. The paper is by Jamie L. Hanson
et al (“Early neglect is associated with alterations in white matter integrity
and cognitive functioning”) and was published in Child Development, Vol. 84(5), pp. 1566-1578.
Before I address the Hanson et al paper, let me
point out that I am far from claiming that neglectful care, whether in an
institution, a foster home, or the birth family, can possibly do infants and
toddlers any good! Nor am I about to say that Hanson et al are wrong in their
conclusions, and I will note that the paper’s discussion carefully lays out
cautions about the results. However, I am concerned that this paper’s technical
pizzazz and use of neuroimaging have the potential for convincing readers that
a clear statement about the relationship between experiences of neglect and
brain development has been made, whereas it seems to me for various reasons
that it has not.
Hanson et al looked at a measure of white matter
organization in the brain and compared 25 adolescents who had been adopted from
orphanages to 38 individuals in the same age range who apparently had not been
adopted (at least I don’t see a statement about this) and were growing up in
homes of about the same SES as the post-institutional adolescents. There were
15 males and 13 females in the post-institutional group and 23 males and 12
females in the comparison group. Nineteen of the post-institutional children
had been adopted from Romania and Russia, 3 from China, and 2 from Bulgaria,
while one family did not report the country of origin. The groups were not
different on measures of pubertal status. Neurological measures mapped brain
connectivity, not brain volume, and found associations between experience of
neglect, decreased white matter in the prefrontal and temporal cortex, and
increased problems on a spatial planning task and on a visual learning and
memory task. There were also developmental problems in other brain areas that
did not appear to be related to the behaviors measured.
This paper reported an enormous amount of difficult
work aimed at answering a question of real practical import. So, why do I think
it’s a problem if anyone rushes to make use of this study for political purposes?
It’s because I have a number of questions about the whole thing.
Most of my questions turn on the fact that adoptive parents
were the source of information about experiences of neglect. As far as I can
see, the paper fails to state how these parents were brought into the study. Were
newspaper advertisements used, or were there contacts with organizations of
adoptive parents? Or, is it possible that Hanson et al had a list of nearby
foreign-adopted children in the right age range and were able to contact parents
and find a reasonable number who were interested? In any of these cases, it is
likely that the parents’ own interests and beliefs determined their
participation in the study, and those interests and beliefs could also have
determined their recollection and reporting of details about the children’s
early experiences.
Hanson et al noted that “there was variability in
the duration and exact timing of the neglect suffered” as it was reported by
the parents, and that the parents’ reports were not correlated with brain or
behavioral findings. In other words, the expected dose-response relationship-- more neglect, more problems of brain and
behavior-- was not demonstrated. The
range of ages at which children had been adopted was from 3 months to 92
months, but the range of time spent in institutional care was 3 to 64 months,
suggesting that one or more children had not been placed in the orphanage in
the first months of life.
In the adoptive parents’ reports, they “consistently
reported [that in the orphanages children had] few one-to-one interactions with
caregivers, lack of toys or stimulation, and very little linguistic stimulation
before 2 years of age”. Objective reports about orphanages in the past suggest
that these are probably correct statements, but one wonders how the parents
were able to make such reports. How long did they spend at the orphanage, and
how much were they actually able to see of institutional life when no visitors
were present? Could it be that their descriptions of their children’s early
experiences were determined by what they had heard and expected about these
institutions, rather than their own experiences? The highly technical side of
the study gives us great detail about neurological and cognitive events, but
without clear evidence about experiences of neglect, it’s not possible to
conclude that neglect caused the problems.
What else could have caused the adopted children’s
developmental problems? Hanson et al point out that there was no information
available about prenatal history or about possible malnutrition. (Relevant to
this, I searched the paper for references to head size or weight and stature,
all measures potentially reduced by malnutrition, and did not find any—although
pubertal status ia also a useful measure.)
Hanson et al
noted that malnutrition and social neglect could play separate or interactive
roles in shaping development, but I would suggest that elements of social
neglect often cause malnutrition even though enough food is available. Most
family babies probably have occasional experiences of poor feeding because of
maternal distraction (I am thinking of a mother at a party who couldn’t get her
6-week-old to take a bottle as they stood in the middle of a crowded, noisy
room), and babies in medical care may be fed insensitively (I am thinking of a
NICU nurse who cleaned and diapered a preterm baby with terrible diaper rash,
then perched the screaming baby on the end of her knee and pushed a bottle into
the child’s mouth). But these events are probably intermittent and temporary
for most babies outside of institutions, whereas in an institution it may be a
consistent experience to have food spooned in too rapidly or a bottle that is
too hard to suck, when overworked and undertrained staff just try to get
through the task. A study of the feeding patterns that had been in place at the
children’s orphanages might give some very useful information, combining an
index of neglect with a view of nutrition.
One of my concerns about this paper is the ease with
which proponents of some system changes may jump to the conclusion that effects
of neglect on brain connectivity have actually been shown, rather than that a
method for looking at this issue has been created. A second concern is that readers will equate “orphanage”
with “neglect”. Given sufficient funding and well-trained staff, there is no
reason why group care has to be neglectful. And, if caregivers have few
resources and poor information, there is no reason to think that foster care or
adoption never involves neglect-- or even abuse.