attachment - key studies Flashcards
(118 cards)
why do we study animals?
-early research into attachment was usually done on animals as there is biological similarity between animals and humans
↳ if something was observed in animal attachment behaviour, it stands to reason that it could also be applied to humans
-research using animals are often seen as more ethical than when conducted with human participants
-researchers are often interested in seeing results over a life span → there are practical advantages of using animals since they breed faster than humans do
which animal studies were conducted?
-lorenz (1935)
-harlow (1959)
the aim of lorenz’s study:
to examine imprinting in animals
what is imprinting?
where the offspring follows and forms an attachment bond to the first large moving object they see after birth
the method of lorenz’s study:
-lorenz conducted an experiment where he randomly divided goose eggs into two batches
-one batch, the control group, was hatched naturally by the mother
-the second batch, the experimental group, were placed in an incubator (lorenz made sure he was the first large moving object that the goslings saw after hatching)
-whether the goslings followed lorenz or the mother goose was recorded
-lorenz then marked the goslings with the conditions they were in & put them in an upside down box
-the box was then removed and whether the goslings followed lorenz or the mother goose was recorded again
the results of lorenz’s study:
-lorenz found that straight after birth the naturally-hatched goslings followed their mother goose, whereas the incubator-hatched goslings followed Lorenz
-when the upside-down box was taken away, the naturally-hatched goslings moved immediately towards their mother, while the incubator-hatched goslings followed lorenz, showing no attachment to their biological mother
-the chicks who saw lorenz before anything else, followed him as if he was their mother
-when they were adult, they performed mating displays to him, and ignored other geese (sexual imprinting)
lorenz’s study: imprinting facts
-imprinting only occurred within a critical period (0-32 hours after hatching)
-this relationship persisted over time and proved to be irreversible
what has lorenz’s research told us about attachment in real life?
-there is a critical period when attachment should be formed, like the imprinting of geese (if the attachments aren’t formed within this time, they will be weaker / won’t form)
-attachment is biological & irreversible
-attachment in early life has an impact on adult relationships
criticisms of lorenz’s research:
-an issue with lorenz’s work is generalising the result to humans
-later research has cast doubt onto some of the conclusions
-it was questioned whether or not there actually was a critical period
-ethical issues
ao3 / criticism - an issue with lorenz’s work is generalising the result to humans
P - an issue with lorenz’s work is generalising the result to humans
E - lorenz only studied geese → we can’t generalise the results to humans since we can’t conclude that they would behave in exactly the same way
↳ attachment formation in mammals appears to be very different to bird species with parents, with the added ability of being able to form attachments beyond the first few hours after birth
L - whilst some of lorenz’s findings have greatly influenced our understanding of development and attachment formation, caution must be applied when drawing wider conclusions about the results
ao3 / criticism - later research has cast doubt onto some of the conclusions
P - later research has cast doubt onto some of the conclusions that lorenz drew from his research
E - guiton et al. (1966) found that chickens would imprint on yellow washing up gloves if that was the largest moving object they first saw after birth and that, in turn, they would then try to mate with that object in adulthood
↳ guiton et al. disagreed with lorenz’s predictions that this relationship persists and is irreversible since, with experience, the chickens could eventually learn to prefer mating with other chickens instead
L - suggests that the effects of imprinting may not be as permanent as initially thought
ao3 / criticism - critical periods were questioned
P - sluckin (1966) questioned whether there actually was a critical period
E - sluckin performed a replication of lorenz’s research, using ducklings, he successfully imprinted them onto himself, but kept one duckling in isolation well beyond lorenz’s reported critical period (up to five days)
↳ he found it was still possible to imprint this youngster
L - this suggests that the critical period is either longer than lorenz thought or a sensitive period
ao3 / criticism - ethical issues
P - ethical issues
E - once imprinting has occurred within a human, the geese believe they can only mate with lorenz (they performed mating rituals to lorenz rather than other geese)
↳ the experiment had prevented the geese from reproducing
L - there are therefore ethical issues which may affect the life of the geese
the aim of harlow’s study:
to examine the extent to which contact comfort and food influences attachment
behaviour in baby rhesus monkeys
the sample of harlow’s study:
8 baby rhesus monkeys
the caged conditions of harlow’s study:
1) wire mother dispensing milk and ‘cloth mother’ with no milk
2) wire mother with no milk and ‘cloth mother’ dispensing milk
the method of harlow’s study:
harlow constructed surrogate two mothers: one wire mother and a ‘towelling mother’
-baby rhesus monkeys were used across the conditions
-the amount of time the baby rhesus monkeys spent with each mother was recorded & how long they spent feeding at each one
stress:
↳ to test for mother preference during periods of stress, the monkeys were startled with a loud noise and their responses recorded
exploration:
a larger cage was used in some conditions to observe the degree of exploration by the baby rhesus monkeys
variations & findings of harlow’s study:
wire mother giving food vs cloth mother giving food:
-monkeys spent more time with the cloth mother (even if she had no milk). the infant would only go to the wire mother when hungry
↳ once fed it would return to the cloth mother for most of the day
scaring the monkeys:
–monkeys ran to cloth mother regardless of whether dispensing food
removing each mother:
-monkey cried more when the cloth mother was removed
exploration version:
-monkeys were too scared to explore when wire mother present, but found confidence to explore when cloth mother was present
rhesus monkeys: critical period
-harlow concludes that the critical period for a mother figure to be introduced to the baby monkey to form an attachment is 90 days
-if an attachment is not made with the mother figure during the critical period, then attachment is impossible and the damage of early maternal deprivation is irreversible
(bad behaviors were only seen in the monkeys left with the surrogate mothers for more than 90 days / for those left less than 90 days, the effects could be reversed if placed in a normal environment where they could form attachments)
define critical period:
a set time in which imprinting must occur or it never would do so
define sensitive period:
a time period best for imprinting
to perform, beyond this time attachments could still be formed
adult behaviours of the baby rhesus monkeys:
-those reared with just the wire mother were the most dysfunctional
-but even those with cloth mother had abnormal social behaviour in adulthood
-aggressive & less sociable
-neglectful parenting of young
-more shy
-unskilled mating behaviour
conclusion of harlow’s study:
-baby rhesus monkeys appear to have an innate drive to seek contact comfort from their parent
-this suggests that attachment is formed through an emotional need for security rather than food (which is in contrast to the learning theory explanation)
-contact comfort provided by the mother
→ more willing to explore their surroundings, lower levels of stress
what important point was found from harlow’s study?
the importance of bonding between caregiver and baby