Attachment Studies
Basic outline of some Attachment studies including procedure, findings, conclusions, strengths and weaknesses
- Created by: Rajvir
- Created on: 11-05-14 17:49
Schaffer and Emerson - Formation of Attachment
Procedure
- 60 babies in Glasgow
- Seperation anxiety and stranger distress behaviour measured via observation and interviews (triangulation)
- Observed in own home - mother asked to rate response to seperation and other everyday situations
Findings
- Seperation anxiety at 6-8 months indicates attachment
- Fear of strangers followed a month later
- After first attachment was formed, multiple attachments were formed with people they saw regularly
- First attachments:
65% - mother
3% - father
27% joint attachment
Schaffer and Emerson - Formation of Attachment
Conclusions
- Attachment behaviours develop in stages which are loosely linked to age - created stages...
* Asocial Stage (0-6 weeks) - baby has same response for people and objects
* Indiscriminate Attachment (6 weeks to 6 months) - sociable but nonspecific
* Specific Attachment (7 months+) - seperation anxiety and stranger distress
* Multiple Attachment (10/11 months+) - many attachments form
Strengths
- High eco validity - carried out in own home - natural behaviour - less stressful and more comfortable - familiar environment - less ethical issues - minimal psychological harm
Weaknesses
- Small sample size - hard to generalise - lacks population validity - Glasgow participants - hard to generalise - historical/era dependent - carried out in 1960s where women were house wives and men had jobs - times have changed
Dollard and Miller - Operant Conditioning
Findings
- Hungry child feels uncomfortable which creates a drive to reduce this discomfort
- When fed, discomfort is reduced and a feeling of pleasure is produced = rewarding
- Food becomes primary reinforcer as it reinforces the behaviour to avoid discomfort and the person supplying the food is associated with avoiding discomfort (secondary reinforcer)
Conclusions
- Attachment occurs because child seeks the person who can supply the reward
Strengths
- Supports learning theory
Harlow and Harlow - Comfort vs Food
Procedure
- 8 infant rhesus monkeys were reared in isolation and deprived of mothers until 8 months old
- In each cage there were 2 surrogate mothers, one made of wire who supplied milk, other made of cloth
- Measured time spent with each mother
- Checked to see if an attachment had been formed by putting a noisy mechanical toy in the cage to frighten the baby monkeys and see which mother they cling to
Findings
- Baby monkey spent a lot more time with cloth mother than wire mother
- Babies used cloth mother as safe base when frightened but only used wire mother for food
Conclusion
- Comfort is important in forming attachments than just food and rewards
Weaknesses
- Used monkeys - cannot generalise to humans - animal study
Lorenz - Imprinting
Procedure
- Lorenz made sure he was the first moving object to be seen by new born geese
Findings
- They formed a rapid attachment to Lorenz - imprinting
Conclusion
- Critical period for attachments to be formed - 32 hours in geese, 2.5 years in humans
- Attachment behaviour is innate
Tronick et al - Monotropy
Procedure
- Studied African tribe who live in extended family groups
- Infants looked after and breastfed by different women but sleep with mother at night
Findings
- At 6 months the infants still showed one primary attachment with mother
Conclusion
- Supports the idea that attachment and caregiving is universal and involve monotropy
Hazan and Shaver - Continuity Hypothesis and IWM
(IWM = Internal working model)
Procedure
- Love quiz where people reported to the local paper experiences and feelings about romantic relationships and childhood relationships with parents
- 215 men and 415 women selected randomly from newspaper, 108 Uni students
Findings
- Strong relationship between childhood attachment type and adult attachment type
- Secure types expressed a belief in lasting love, thought they were lovable and found others trustworthy
- Avoidant types were doubtful of love, didn't believe it existed - didn't want relationships
- Ambivalent types - fell in love easy and rarely found true love - insecure in relationships
Conclusion
- Childhood attachments influence adulthood attachments
Bowlby - Evolutionary Theory
- Innate - born with attachment behaviours
- Social releasers - behaviours that force reciprocal interaction
- Monotropy - single attachment to one person who is most important to baby
- Continuity Hypothesis - the Internal Working Model says first attachment provides a template for future relationships
- Sensitive Period - attachment formed within first 2.5 years
Strengths
- Continuity Hypothesis support from Hazen and Shaver
- Monotropy support from Tronick
- Innate support from Lorenz
Weaknesses
- Ignored multiple attachments - Schaffer and Emerson
Ainsworth - Strange Situation
- 100 infants 12-18 months old were observed through cameras in a lab playroom
- Measured seperation anxiety on mother's departure and stranger distress when interaction with stranger occured - examined behaviour towards mother in strange environment
Procedure
1. Mother and infant enter room - mother sits on chair and reads - infant free to play with toys
2. After 3 mins, stranger enters
3. Stranger approaches infant, attempts to interact
4. Mother leaves - stranger attempts to comfort the baby
5. After 3 mins, mother returns and stranger leaves
6. After 3 mins, mother leaves so baby is alone
7. Stranger enters and offers comfort
8. Mother returns and stranger leaves
Ainsworth - Strange Situation
Findings
- 3 broad types of attachment behaviour in infants:
* Secure infants (type B) - seperation anxiety when mother leaves, stranger offers comfort, on joy on reunion baby is happy (70%)
Insecure avoidant (type A) - no seperation anxiety, no stranger distress, on reunion baby shows no interest (15%)
Insecure ambivalent/resistant (type C) - seperation anxiety intense, distress shown, avoids stranger - seeking comfort from mother to wanting distance (15%)
Strengths
- High control - lab - EVs minimised - establish cause and effect - replicatable - mundane realism
Weaknesses
- Lacks validity - artificial and unfamiliar nature of playroom - results subjective
De Wolf and Ijzendoorn - Parental Sensitivity
- Meta-analysis
Findings
- Positive correlation between sensitivity and attachment
Conclusion
- Mothers who are less sensitive or responsive to babies are likely to have insecure attached infants
- Mothers who are sensitive to infant's needs are likely to produce secure attachments with child
Thomas and Chess - Temperament
3 types of temperament:
- easy
- slow to warm up
- difficult
Fox - Temperament
- Strong relationship between the attachment types of a child to both parents
- Attachments are related to inbuilt temperaments
Ijzendoorn - Cultural Variations in Attachments
Procedure
- Meta analysis of 32 seperate case studies carried out in 8 different countries using Ainsworth's Strange Situation
- 2000 babies were studied
- In each study, babies were classified as Type A, B or C
Findings
- Secure attachments were most common in all cultures with lowest proportion 50% in China and highest at 75% in UK
- Avoidant attachment most common in West Germany and rare in Israel and Japan
- Ambivalent attachment most common in Israel, China and Japan but rare in Scandinavian countries like Sweden
- 3 studies within Germany showed very different findings and 2 Japanese studies varied where one had no type A and the other had 20%
Ijzendoorn - Cultural Variations in Attachments
Conclusion
- Intra cultural variations (within cultures) was 1.5 times the cross cultural variations (between cultures)
- It is an oversimplification to assume all children are brought up in the same way in a particular culture or country
Strengths
- Large sample size - representative of true population - population validity - can generalise results
Weaknesses
- Method is culture specific - developed in USA - invalid
Schaffer and Callender - Seperation & Age
Procedure
- 76 babies aged between 3 and 51 weeks who were admitted to a children's hospital
Findings
- Children younger than 7 months showed minimal upset, adjusted to hospital well and weren't clingy
- Between 7 months and 18 months, strength of response was larger due to language skills and ability to understand that attachment figure will return
Koluchova - Privation - Czech Twins
Procedure
- Case study of Czech twins whose mother died after giving birth
- Twins went to children's home for 11 months, 6 months with aunt and stayed with father (low intelligence) and stepmother (cruel) at 18 months
- Father& stepmother never let twins out of house - left in small unheated closet - found age 7
Findings
- Twins could hardly walk, had rickets, were fearful and had poor speech
- After hospital and foster home placement, twins formed strong bond with adopted parents
Conclusion
- With good & loving care, recovery from privation is possible - taking into account age
Strengths
- Valuable info on effects of privation on childrens development
Weaknesses
- Single study = hard to generalise - not representative to population - lack of informed consent
Curtiss - Privation - Genie
Procedure
- Case study of Genie who was found at age 13
- Isolated, neglected, abused, physically restrained - couldn't walk, talk - malnourished
Findings
- Never achieved good social adjustment or language skills despite being fostered
Conclusion
- Recovery can not always happen after privation - due to length of privation or age found
Strengths
- Provides valuable info about effects of privation
Weaknesses
- Case study - one case - cannot generalise - lack of informed consent
Robertson - Short term effects of Seperation - PDD
Procedure
- Natural observations of various infants who were seperated from their attachment figure during hospitalisation
- Case study of John (17mths) placed in residential nursery for 9 days whilst mum at hospital
- At the time of the study only 25% hospitals allowed daily visiting and 12% prohibited visitors
Findings
- Child response to seperation: Protest (secure attachment), Despair, Detachment (insecure avoidant attachment)
Strengths
- Natural experiment - observations free from investigator effects & demand characteristics - high ecological validity
- Lead to change in instiutional care for children visiting hours to increase
Weaknesses
- Few case studies - small sample - hard to generalise - lacks validity
Robertson - Long term effects of Seperation
DEPRIVATION
Procedure
- Observations of infants who were seperated from attachment figure for long time
Findings
- Extreme clinginess when parent leaves
- Child detached from caregiver - refuses comfort (insecure avoidant attachment)
- Alternate between clinginess and detachment - unpredictable behaviour (insecure ambivalent)
Strengths
- Natural experiment - free from investigator effects and demand characteristics - high ecological validity
Weaknesses
- Few case studies - hard to generalise - lack population validity - small sample
Bowlby - Maternal Deprivation
Procedure
- Interviewed a group of 44 juvenile theives of which 16 were affectionless psychopaths
- Compared to 44 children who had not committed crimes but had emotional difficulties
Findings
- 86% of affectionless psychopaths had prolonged periods of seperation
- 17% of theives had experienced seperation
- 4% of non-theives had experiences of seperation
Conclusion
- Correlation between maternal deprivation and emotional/behavioural disorders leading to anti-social behaviour
- Supports maternal deprivation hypothesis
Tizard and Hodges - Privation
Procedure
- 65 children brought up in a childrens home from 1 week old
- No attachments - didn't form any with carers due to constant staff changes (24 carers by age 2, 50 by age 4)
- Had good physical and intellectual care
- At age 4, 25 children restored to parents, 33 adopted, rest remained in care => assessed at 8
- At age 16, children did interview and teacher and peers completed questionnaires
Findings
- At age 2, there was disinhibited attachment - no stranger distress - showed seperation anxiety towards any stranger who gave them attention
- By age 8, adoptees formed close attachment with parents
- At aged 16, more adoptees than restored children were close with parents
- Restored group had worst sibling relationships - were argumentative also
- All had bad peer relationships and seeked attention from adults at school
Tizard and Hodges - Privation
Conclusion
- If you put a child in an institution at a young age - long term effects occure on emotional and social development
Strengths
- Longitudinal study - development over time - without making assumptions of previous events
- Natural experiment - less demand characteristics - natural behaviour - high validity
- Triangulation of methods used - detailed and rich data
Weaknesses
- Longitudinal study - sample size decrease over time due to right to withdraw - sample unrepresentative - hard to generalise findings
- Natural experiment - low control - more EVs - difficult to establish cause and effect - lacks validity
Rutter - Institutionalisation
Procedure
- Romanian orphans put in institutions with poor conditions after civil war
- 58 adopted before 6 months (early), 59 adopted between 6-24 months, 48 adopted between 2-4 years (late)
- Compared to UK adoptees who were adopted before 6 months
- Followed up at age 6 and 11 using interview and observation
Findings
- At age 6 - disinhibited attachment - marked disinhibited attachment most common in late adopted Romanians with 26.1%, rare in UK 3.8%, early adopted Romanians 8.9%
- At age 11 - disinhibited attachment- 54% Roms showing mild or marked disinhibited attachments - at age 11 many Romanians had special education and mental support
Conclusion
- Disinhibited attachments are more likely in children who have experienced longer periods in institutions - can affect mental and educational development
Rutter - Institutionalisation
Strengths
- Triangulation - rich and detailed data
- Natural experiment - less demand characteristics and more natural behaviour - high validity
- Longitudinal study - takes place over time
Weaknesses
- Interviews and observations are subjective - interpretation - investigator effects present - less natural behaviour - less internal validity
- Natural experiment - low control - cannot manage EVs - difficult to establish cause and effect
- Longitudinal study - sample size decrease - unrepresentative - findings cannot be generalised - lack of population validity
Campbell et al - Daycare
Procedure
- 48 Swedish participants aged 18 months to 3.5 years
- 9 in family based care, 30 in nursery, 9 switched between both
- At 18 months, child observed at home - standard of care assessed using Caldwells home inventory method
- Observed in a day care setting - gives baseline measurement to see abilities of child before care
- Assessments repeated at 2.5 years and 3.5 years
- At 6.5 years social competence assessed based on caregiver descriptions
- At 8.5 years teachers gave perceptions of childs social behaviour
- At 15 years, completed 2 self-reports measurements on friendship quality and social style
Findings
- Children who spent long days in daycare under 3.5yrs were less socially competent
- Children who attented more days a week but shorter times were more socially competent
- Long days = child tired = frustrated = negative interactions
- High quality care before 3.5yrs developed better social abilities
- Social competence was stable between 3.5 and 15yrs
Campbell et al - Daycare
Conclusions
- Good quality early care at least up to the age of 3.5yrs is important in the development of socially skilled children - level of competence persists through childhood
- Length of time spent in day care affects social development
Strengths
- Prospective as participants were contiuously studied from age 18 months to 15 yrs - reliable - can see long term effects
- Triangulation - rich and detailed info
- Natural experiment - no demand characteristics - high internal and ecological validity - generalise
Weaknesses
- Small sample - culturally bias - unrepresentative - hard to generalise findings - lack of population validity
- Methods used were subjective - interpretation and opinion - unreliable
Shea - Positive effects of Daycare
Procedure
- Natural observation - see if sociablity increased with attendance at day care
- 3 to 4 years old - filmed in playground for first 10 weeks after they started nursery
Findings
- Sociablity increased over the 10 weeks as frequency of peer interaction increased
- Decrease in aggressive behaviour over 10 weeks
- Increase in social behaviour was greater for those attending 5 days a week compared to 2 days
Conclusion
- Daycare increases sociability
Clarke Stewart - Positive effects of Daycare
Procedure
- Observed 2 to 3 year olds from various backgrounds in Chicago
Findings
- Peer relationships were more advanced in children who had attended daycare
- Daycare children learned earlier how to cope with social situations and how to negociate with peers
Conclusion
- Daycare increases sociability
Belsky - Negative effects of Daycare
Procedure
- Babies under the age of 1 in a daycare
Findings
- 43% had insecure attachment to mother if attended more than 20 hours a week of daycare
Conclusion
- Daycare at an early age can affect attachment formation
NICHD - Negative effects of Daycare
Findings
- Daycare can increase aggressive behaviour in children who had more than 10 hours of day care each week as they became irritable and had to compete for space, toys and attention
- Overcrowding increases aggression levels and stress levels
Conclusion
- Daycare increases aggression
Lamb - Negative effects of Daycare
Findings
- Children in daycare have increased levels of stress hormone cortisol
- Stress is linked to higher levels of aggressive behaviour
Conclusion
- Day care increases aggression and stress
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