Developmental psychology is the scientific study of how and why humans grow, change, and adapt across the course of their lives. Originally concerned with infants and children, the field has expanded to include adolescence, adult development, aging, and the entire lifespan. Developmental psychologists aim to explain how thinking, feeling, and behaviors change throughout life. This field examines change across three major dimensions, which are physical development, cognitive development, and social emotional development. Within these three dimensions are a broad range of topics including motor skills, executive functions, moral understanding, language acquisition, social change, personality, emotional development, self-concept, and identity formation.
Reactive attachment disorder (RAD) is described in clinical literature as a severe disorder that can affect children, although these issues do occasionally persist into adulthood. RAD is characterized by markedly disturbed and developmentally inappropriate ways of relating socially in most contexts. It can take the form of a persistent failure to initiate or respond to most social interactions in a developmentally appropriate way—known as the "inhibited form". In the DSM-5, the "disinhibited form" is considered a separate diagnosis named "disinhibited attachment disorder".
An attachment theory is a psychological, evolutionary, and ethological theory concerning relationships between humans. The most important tenet is that young children need to develop a relationship with at least one primary caregiver for normal social and emotional development. The theory was formulated by psychiatrist and psychoanalyst John Bowlby (1907–1990).
A form of child abuse, child neglect is an act of caregivers that results in depriving a child of their basic needs, such as the failure to provide adequate supervision, health care, clothing, or housing, as well as other physical, emotional, social, educational, and safety needs. All societies have established that there are necessary behaviours a caregiver must provide for a child to develop physically, socially, and emotionally. Causes of neglect may result from several parenting problems including mental disorders, unplanned pregnancy, substance use disorder, unemployment, over employment, domestic violence, and, in special cases, poverty.
Emotional dysregulation is characterized by an inability in flexibly responding to and managing emotional states, resulting in intense and prolonged emotional reactions that deviate from social norms, given the nature of the environmental stimuli encountered. Such reactions not only deviate from accepted social norms but also surpass what is informally deemed appropriate or proportional to the encountered stimuli.
Evolutionary developmental psychology (EDP) is a research paradigm that applies the basic principles of evolution by natural selection, to understand the development of human behavior and cognition. It involves the study of both the genetic and environmental mechanisms that underlie the development of social and cognitive competencies, as well as the epigenetic processes that adapt these competencies to local conditions.
Dyadic developmental psychotherapy is a psychotherapeutic treatment method for families that have children with symptoms of emotional disorders, including complex trauma and disorders of attachment. It was originally developed by Arthur Becker-Weidman and Daniel Hughes as an intervention for children whose emotional distress resulted from earlier separation from familiar caregivers. Hughes cites attachment theory and particularly the work of John Bowlby as theoretical motivations for dyadic developmental psychotherapy.
Childhood trauma is often described as serious adverse childhood experiences (ACEs). Children may go through a range of experiences that classify as psychological trauma; these might include neglect, abandonment, sexual abuse, emotional abuse, and physical abuse, witnessing abuse of a sibling or parent, or having a mentally ill parent. These events have profound psychological, physiological, and sociological impacts and can have negative, lasting effects on health and well-being such as unsocial behaviors, attention deficit hyperactivity disorder (ADHD), and sleep disturbances. Similarly, children whose mothers have experienced traumatic or stressful events during pregnancy have an increased risk of mental health disorders and other neurodevelopmental disorders.
In psychology, personal distress is an aversive, self-focused emotional reaction to the apprehension or comprehension of another's emotional state or condition. This negative affective state often occurs as a result of emotional contagion when there is confusion between self and other. Unlike empathy, personal distress does not have to be congruent with the other's state, and often leads to a self-oriented, egoistic reaction to reduce it, by withdrawing from the stressor, for example, thereby decreasing the likelihood of prosocial behavior. There is evidence that sympathy and personal distress are subjectively different, have different somatic and physiological correlates, and relate in different ways to prosocial behavior.
The differential susceptibility theory proposed by Jay Belsky is another interpretation of psychological findings that are usually discussed according to the diathesis-stress model. Both models suggest that people's development and emotional affect are differentially affected by experiences or qualities of the environment. Where the Diathesis-stress model suggests a group that is sensitive to negative environments only, the differential susceptibility hypothesis suggests a group that is sensitive to both negative and positive environments. A third model, the vantage-sensitivity model, suggests a group that is sensitive to positive environments only. All three models may be considered complementary, and have been combined into a general environmental sensitivity framework.
Michael E. Lamb is a professor and former Head of the then Department of Social and Developmental Psychology at the University of Cambridge, known for his influential work in developmental psychology, child and family policy, social welfare, and law. His work has focused on divorce, child custody, child maltreatment, child testimony, and the effects of childcare on children's social and emotional development. His work in family relationships has focused on the role of both mothers and fathers and the importance of their relationships with children. Lamb's expertise has influenced legal decisions addressing same-sex parenting, advocating for fostering and adoption by adults regardless of their marital status or sexual orientations. Lamb has published approximately 700 articles, many about child adjustment, currently edits the APA journal Psychology, Public Policy, and Law, and serves on the editorial boards on several academic journals.
Moral development focuses on the emergence, change, and understanding of morality from infancy through adulthood. The theory states that morality develops across a lifespan in a variety of ways and is influenced by an individual's experiences and behavior when faced with moral issues through different periods of physical and cognitive development. Morality concerns an individual's reforming sense of what is right and wrong; it is for this reason that young children have different moral judgment and character than that of a grown adult. Morality in itself is often a synonym for "rightness" or "goodness." It also refers to a specific code of conduct that is derived from one's culture, religion, or personal philosophy that guides one's actions, behaviors, and thoughts.
Child neglect, often overlooked, is the most common form of child maltreatment. Most perpetrators of child abuse and neglect are the parents themselves. A total of 79.4% of the perpetrators of abused and neglected children are the parents of the victims, and of those 79.4% parents, 61% exclusively neglect their children. The physical, emotional, and cognitive developmental impacts from early childhood neglect can be detrimental, as the effects from the neglect can carry on into adulthood.
Amy Gene Halberstadt is an American psychologist specializing in the social development of emotion. She is currently Alumni Distinguished Undergraduate Professor of Psychology at North Carolina State University in Raleigh, North Carolina, and is an editor of the journal Social Development.
Patricia McKinsey Crittenden is an American psychologist known for her work in the development of attachment theory and science, her work in the field of developmental psychopathology, and for creation of the Dynamic-Maturational Model of Attachment and Adaptation (DMM).
Callous-unemotional traits (CU) are distinguished by a persistent pattern of behavior that reflects a disregard for others, and also a lack of empathy and generally deficient affect. The interplay between genetic and environmental risk factors may play a role in the expression of these traits as a conduct disorder (CD). While originally conceived as a means of measuring the affective features of psychopathy in children, measures of CU have been validated in university samples and adults.
Tina Malti is a Canadian-German child psychologist of Palestinian descent. She currently holds an Alexander von Humboldt Professorship for Early Child Development and Health as the first child psychologist and female psychologist in the award's history. She directs the Alexander von Humboldt Research Group for Child Development as research chair at Leipzig University. She is also a professor of psychology at the University of Toronto and founding director of the Centre for Child Development, Mental Health, and Policy at the University of Toronto.
Jude Anne Cassidy is Professor of Psychology and Distinguished Scholar-Teacher at the University of Maryland. Cassidy was awarded the American Psychological Association Boyd McCandless Young Scientist Award in 1991 for her early career contributions to Developmental Psychology. She is a Fellow of the American Psychological Association, Division 7 and the Association for Psychological Science.
Social emotional development represents a specific domain of child development. It is a gradual, integrative process through which children acquire the capacity to understand, experience, express, and manage emotions and to develop meaningful relationships with others. As such, social emotional development encompasses a large range of skills and constructs, including, but not limited to: self-awareness, joint attention, play, theory of mind, self-esteem, emotion regulation, friendships, and identity development.
Carolyn Zahn-Waxler is an American developmental psychologist known for studying morality over the life span, social emotions, and empathy in childhood. She holds the position of Honorary Fellow at the Center for Healthy Minds at the University of Wisconsin–Madison.
