Topic E: Developmental psychology A2

Attachment theories explain a lasting emotional bond in different ways. Learning accounts emphasise consequences and models; Bowlby proposed an evolved attachment system whose early relationship becomes a template for later relationships.

Bowlby's 44 Juvenile Thieves study compared 44 referred thieves with 44 clinic controls. Fourteen thieves were classified as affectionless, and 12 of these had experienced prolonged early separation. Detailed interviews and an independent social worker added depth, but Bowlby interpreted his own cases and separation may be confounded with the conditions that caused it.

Ainsworth operationalised attachment through an eight-episode structured observation involving a caregiver, stranger, separation and reunion. The most diagnostic behaviour is how the infant uses and responds to the caregiver, especially on reunion.

The caregiver-sensitivity hypothesis proposes that caregivers who notice a child's signals and respond promptly and appropriately are more likely to have securely attached infants. Sensitivity concerns the fit of the response to the child's cue, not constant indulgence.

Development can be explained as active construction, socially supported learning, learned speech or an innate language capacity. These accounts answer different questions and need not be treated as mutually exclusive.

Early communication moves from cooing and babbling to one-word speech, two-word combinations and telegraphic speech, then increasingly complex grammar and vocabulary. Piaget links object permanence to sensorimotor representation, egocentrism and non-conservation to pre-operational thought, and logical conservation to concrete operations.

Social and emotional development involves resolving changing interpersonal demands, learning through other people and regulating attention and emotion. Erikson, Vygotsky and mindfulness describe different levels of this process.

Vygotsky treats development as culturally mediated: dialogue with a more knowledgeable other is internalised, and scaffolding makes a task achievable within the ZPD. Mindfulness programmes teach present-moment attention, breathing and non-reactive awareness; this may improve attentional control, emotion regulation and relationships when delivery is appropriate.

Van IJzendoorn and Kroonenberg (1988) used meta-analysis to ask whether Strange Situation attachment distributions differed between and within cultures.

They selected infant-mother studies using the Strange Situation and A/B/C classifications, excluded special samples, overlapping samples, groups below 35 and children aged two or over. The final dataset contained 32 samples from eight countries and 1,990 Strange Situations. Ainsworth's US distribution was initially considered as a baseline.

Cassibba et al. (2013) tested whether Italian child and adult attachment distributions followed international norms or showed culture-specific patterns.

A systematic search of 1990-2009 SSP and Adult Attachment Interview research included peer-reviewed and suitable unpublished work to reduce publication bias. Overlapping samples were excluded and reliable coding was required. Seventeen SSP studies supplied 23 samples and 627 participants; 50 AAI studies supplied 72 samples and 2,258 participants.

Ashdown and Bernard (2012) investigated whether explicit social-emotional learning through the You Can Do It! Early Childhood Education programme improved well-being, competence, behaviour and reading.

The study involved four teachers and 99 five- to six-year-olds from one low-socioeconomic-status Catholic school in Melbourne; about two-thirds used English as a second language. One preparatory and one Grade 1 class were randomly selected for the ten-week teacher-led programme, with the other classes as comparisons. Teachers rated pupils before and after using established well-being and social-skills instruments; reading level and implementation observations were also recorded.

Ding et al. (2014) used a longitudinal design to examine whether infant attachment related to later attachment, cognitive development and behavioural problems.

The Shanghai sample began with 160 healthy, firstborn, full-term infant-mother pairs assessed by the Strange Situation at 12-18 months. At about age three, 118 returned. Attachment was reassessed with video coding and a 90-card Attachment Q-set; blinded professional assessors used the BSID-II for mental and psychomotor development, while mothers completed a behaviour checklist. Attachment coding agreement was 95%.

Developmental research must fit children's changing communication, dependence and context. Method choice determines whether the evidence describes age-group differences, within-person change or a child's lived world.

Punch (2002) used extended ethnographic work with rural Bolivian young people, including drawings, photographs, diaries, worksheets and participatory rural appraisal. These child-friendly methods revealed how location, family expectations and opportunities shaped school-to-work choices.

Cross-cultural research compares psychological patterns across cultural settings. In attachment research it asks whether classifications are universal features, culturally shaped responses, or artefacts of applying one procedure everywhere.

Van IJzendoorn and Kroonenberg found Type B modal across eight countries but greater variation within than between countries. Cassibba found both broadly shared secure attachment and Italian distribution differences. These results support nature-and-nurture interaction more than a culture-free norm.

The UN Convention on the Rights of the Child (1989) requires research to treat children as rights-holders. Protection from harm and respect for privacy must be balanced with the child's right to express a view and have it taken seriously.

Researchers can use play, drawings, simple choices, observation and supported interviews so children can communicate without adult vocabulary. Adults should check understanding rather than assume silence means agreement. Incentives must not make refusal unrealistic.

Data interpretation begins with the research question and level of measurement, then separates description of the sample from an inferential decision. Developmental context does not change the statistical rules.

State hypotheses before analysis, choose one- or two-tailed testing from the justified prediction, and compare the observed statistic with the critical value at the chosen significance level. Reject the null only when the decision rule is met. Type I means rejecting a true null; Type II means failing to reject a false null.

A useful evaluation connects a feature of the actual developmental study to the evidence it changes and then to the claim that becomes stronger or weaker. A generic label such as 'low validity' is not an evaluation.

Ding's 95% attachment-coding agreement supports reliability, while blinded cognitive assessors reduce expectancy bias. Yet maternal behaviour ratings and loss of 42 families remain validity and generalisability limits. Each point changes a particular inference rather than making the whole study simply 'good' or 'bad'.

Ethical research balances knowledge or benefit against burdens while respecting the participant's status. Human consent and animal licensing are starting conditions, not proof that every procedure is justified.

The Strange Situation produces brief separation distress, so researchers need parental permission, child-sensitive stopping rules and a benefit that justifies the burden. Secondary meta-analysis can avoid exposing new children. Animal work may allow invasive causal tests, but species differences and stress can undermine both welfare and validity.

Practical issues are the real constraints that determine whether a study can recruit, measure, retain and compare participants as planned. They matter because a compromised procedure changes the meaning of the result.

Ding reimbursed travel for follow-up, yet 42 of 160 families were lost. Ashdown and Bernard used existing classes, making delivery feasible but leaving only four class clusters from one school. An improvement should target the weakness—for example multi-site recruitment for population coverage, not just 'more people'.

Reductionism explains behaviour through a smaller set of components; holism explains the person as an interacting system in context. The debate concerns explanatory level, not whether an account is detailed or brief.

The Strange Situation reduces attachment to observable exploration, separation and reunion behaviours, supporting reliable classification. Bowlby's internal working model adds a developmental mechanism, while Punch's ethnography gives a more holistic account of how family, location, school and personal goals shape young people's transitions.

An approach supplies broad assumptions, a theory proposes an explanation, and a model represents selected processes or relationships. They should be compared by what they explain and predict, not by label alone.

Accounts may operate at different levels and make different predictions. Skinner predicts sensitivity to reinforcement; Chomsky predicts rule-governed language that outruns imitation; Vygotsky predicts better performance with contingent support. Evidence can therefore discriminate between parts of the accounts.

Psychology has stronger scientific status when claims are empirical, testable and potentially falsifiable, variables are operationalised, procedures are replicable and evidence is analysed objectively. These qualities exist by degree across methods.

Controlled methods improve causal testing, while clinical interviews and ethnography can produce valid meaning that a narrow experiment misses. Scientific quality should be evaluated from the claim-method match rather than ranking all quantitative data above all qualitative data.

Cultural and gender issues arise when one group's concepts, samples or norms are treated as universal. Bias can affect the question, operational definition, recruitment, researcher-participant interaction, interpretation and application.

Use diverse and within-culture samples, include relevant caregivers, check measurement equivalence, collaborate with local researchers and report uncertainty instead of forcing binary gender or national categories. Emic research can identify local meaning; etic comparison can then test carefully defined commonalities.

Nature refers to inherited or evolved influences; nurture refers to environmental experience. Developmental psychology usually supports interaction: biological preparedness changes how experience is used, while experience changes developmental pathways.

Type B attachment being modal across countries is compatible with a shared human tendency, while large within-country and cross-cultural differences show environmental variation. Ding's longitudinal associations cannot isolate inherited temperament from caregiving, so they do not settle the debate.

Psychology develops when new methods, evidence, ethical standards and social contexts change what can be asked and what counts as an acceptable explanation. Later research may refine an earlier theory rather than simply replace it.

Historical context matters: Watson and Rayner's fear conditioning and Bowlby's mother-centred language reflect assumptions and ethical standards of their periods. Their influence can be recognised while their claims and procedures are re-evaluated using current evidence.

Social control is the use of psychological knowledge to shape, classify or regulate people's behaviour. It can protect welfare or restrict autonomy depending on who sets the goal, who can refuse and how outcomes are monitored.

Ask who benefits, what evidence supports the intervention, whether the least restrictive option is used, how consent and withdrawal work, and whether affected children and families help define success. Monitor both intended outcomes and stigma or unequal access.

Psychological knowledge is useful when a well-supported mechanism is translated into a proportionate intervention and its real outcome is evaluated. Application should preserve the evidential limits of the source research.

Use converging evidence, involve affected communities, pilot the application, compare benefits with harms and measure outcomes rather than assuming theoretical plausibility. Ashdown and Bernard show why outcome specificity matters: social-emotional gains did not mean every behaviour and reading outcome improved.

Socially sensitive research has potential consequences beyond participants for families, social groups or institutions. The ethical task includes the question asked, assumptions made, interpretation, publication and later use—not only consent during data collection.

Attachment research can improve childcare and hospital policy, yet terms such as 'maternal deprivation', 'insecure' or 'at risk' can blame caregivers and predict harm too confidently. Cross-cultural distributions can reveal contextual variation but may also stereotype whole countries if within-culture diversity is hidden.