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In psychology, developmental stage theories are theories that divide psychological development into distinct stages which are characterized by qualitative differences in behavior.

There are several different views about psychological and physical development and how they proceed throughout the life span. The two main psychological developmental theories include continuous and discontinuous development. In addition to individual differences in development, developmental psychologists generally agree that development occurs in an orderly way and in different areas simultaneously.

Stage theories

The development of the human mind is complex and a debated subject, and may take place in a continuous or discontinuous fashion. Continuous development, like the height of a child, is measurable and quantitative, while discontinuous development is qualitative, like hair or skin color, where those traits fall only under a few specific phenotypes. Continuous development involves gradual and ongoing changes throughout the life span, with behavior in the earlier stages of development providing the basis of skills and abilities required for the next stages. On the other hand, discontinuous development involves distinct and separate stages, with different kinds of behavior occurring in each stage.

Stage theories of development rest on the assumption that development is a discontinuous process involving distinct stages which are characterized by qualitative differences in behavior. They also assume that the structure of the stage is not variable according to each individual; however the time of each stage may vary individually. While some theories focus primarily on the healthy development of children, others propose stages that are characterized by a maturity rarely reached before old age.

Ego-psychology

The psychosexual stage theory created by Sigmund Freud (b.1856) consists of five distinct stages of Psychosexual development that individuals will pass through for the duration of their lifespan. Four of these stages stretch from birth through puberty and the final stage continues throughout the remainder of life. Erik Erikson (b.1902) developed a psychosocial developmental theory, which was both influenced and built upon by Freud, which includes four childhood and four adult stages of life that capture the essence of personality during each period of development. Each of Erikson's stages include both a positive and negative influences that can go on to be seen later in an individual's life. His theory includes the influence of biological factors on development. Jane Loevinger (b.1918) build on the work of Erikson in her description of stages of ego development.

Individuation and attachment in ego-psychology

Margaret Mahler (b.1897) theory of separation-individuation in child development contains three phases regarding the child's object relations. John Bowlby (b.1907) 's attachment theory proposes that developmental needs and attachment in children are connected to particular people, places, and objects throughout our lives. These connections provide a behavior in the young child that is heavily affected and relied on throughout the entire lifespan. In case of maternal deprivation, this development may be disturbed. Robert Kegan (b.1946) provided a theory of the evolving self, which describes the constructive development theory of subject–object relations. Martin Buber also explores this idea of evolving self through the theory of subject-object relations. His theory builds off of Piaget's stages of cognitive development particularly in early to late adulthood and how adults acquire knowledge.

Cognitive and moral development

Cognitive development

Piaget's cognitive development theory

Jean Piaget's cognitive developmental theory describes four major stages from birth through puberty, the last of which starts at 12 years and has no terminating age: Sensorimotor: (birth to 2 years), Preoperations: (2 to 7 years), Concrete operations: (7 to 11 years), and Formal Operations: (from 12 years). Each stage has at least two substages, usually called early and fully. Piaget's theory is a structural stage theory, which implies that:

• Each stage is qualitatively different; it is a change in nature, not just quantity;
• Each stage lays the foundation for the next;
• Everyone goes through the stages in the same order.

Neo-Piagetian theories

Neo-Piagetian theories criticize and build on Piaget's work. Juan Pascaual-Leone was the first to propose a neo-Piagetian stage theory. Since that time several neo-Piagetian theories of cognitive development have been proposed. These include the theories of Robbie Case, Grame Halford, Andreas Demetriou and Kurt W. Fischer. The theory of Michael Commons' model of hierarchical complexity is also relevant. The description of stages in these theories is more elaborate and focuses on underlying mechanisms of information processing rather than on reasoning as such. In fact, development in information processing capacity is invoked to explain the development of reasoning. More stages are described (as many as 15 stages), with 4 being added beyond the stage of Formal operations. Most stage sequences map onto one another. Post-Piagetian stages are free of content and context and are therefore very general.

Other related theories

Lawrence Kohlberg (b.1927) in his stages of moral development described how individuals developed moral reasoning. Kohlberg agreed with Piaget's theory of moral development that moral understanding is linked to cognitive development. His three levels were categorized as: preconventional, conventional, and postconventional, all of which have two sub-stages. James W. Fowler (b.1940), and his stages of faith development theory, builds off of both Piaget's and Kohlberg's schemes.

Learning and education

Maria Montessori (b.1871) described a number of stages in her educational philosophy. Albert Bandura (b.1925), in his social learning theory, emphasizes the child's experiential learning from the environment.

Spirituality and consultancy

Inspired by Theosophy, Rudolf Steiner (b.1861) had developed a stage theory based on seven-year life phases. Three childhood phases (conception to 21 years) are followed by three stages of development of the ego (21–42 years), concluding with three stages of spiritual development (42-63). The theory is applied in Waldorf education

Clare W. Graves (b.1914) developed an emergent cyclical levels of existence theory. It was popularized by Don Beck (b.1937) and Chris Cowan's as spiral dynamics, and mainly applied in consultancy. Ken Wilber (b.1949) integrated Spiral Dynamics in his integral theory, which also includes psychological stages of development as described by Jean Piaget and Jane Loevinger, the spiritual models of Sri Aurobindo and Rudolf Steiner, and Jean Gebsers theory of mutations of consciousness in human history.

Other theories

Lev Vygotsky (b.1896) developed several theories, particularly zone of proximal development. Other theories are not exactly developmental stage theories, but do incorporate a hierarchy of psychological factors and elements. Abraham Maslow (b.1908) described a hierarchy of needs. James Marcia (b.1937) developed a theory of identity achievement and identity status.

References

1. ^ Hayslip Jr., Bert; Neumann, Craig S.; Louden, Linda; Chapman, Benjamin (2006). "Developmental Stage Theories". In Hersen, Michel; Thomas, Jay C. (eds.). Comprehensive Handbook of Personality and Psychopathology, Vol. 1. Personality and Everyday Functioning. Hoboken, NJ: John Wiley & Sons. pp. 115–141. ISBN 9780471488385. OCLC 59279973.
2. Eysenck, Michael W. (2017). "Developmental approach". Simply Psychology: 121–175. doi:10.4324/9781315517933-9. ISBN 9781315517933.
3. ^ Carter, Linda; Grivas, John (2004). Psychology for South Australia: Stage 1. Milton, Qld.: Jacaranda. ISBN 9780731400942. OCLC 224074696.
4. "What Is Lifespan Development? | Introduction to Psychology". courses.lumenlearning.com. Retrieved 2021-03-18.
5. Crain, William (2015-10-02). Theories of Development: Concepts and Applications: Concepts and Applications. Psychology Press. ISBN 978-1-317-34322-6.
6. "Themes and Theories of Child Development". highered.mheducation.com. Retrieved 2021-03-06.
7. "Freud and the Psychodynamic Perspective | Introduction to Psychology". courses.lumenlearning.com. Retrieved 2021-03-16.
8. Berk, Laura (2018). Development Through The Lifespan (7th ed.). Boston: Pearson. p. 184. ISBN 978-0-13-441969-5.
9. Knight, Zelda Gillian (2017). "A proposed model of psychodynamic psychotherapy linked to Erik Erikson's eight stages of psychosocial development". Clinical Psychology & Psychotherapy. 24 (5): 1047–1058. doi:10.1002/cpp.2066. ISSN 1099-0879. PMID 28124459.
10. Schaffer, H. Rudolph (2004). Introducing child psychology. Malden, MA: Blackwell Pub. ISBN 0-631-21627-8. OCLC 51799325.
11. Richardson, Kathleen (March 2019). "The human relationship in the ethics of robotics: a call to Martin Buber's I and Thou". AI & Society. 34 (1): 75–82. doi:10.1007/s00146-017-0699-2. ISSN 0951-5666. S2CID 14638499.
12. "Cognitive Development | Encyclopedia of Special Education: A Reference for the Education of Children, Adolescents, and Adults with Disabilities and Other Exceptional Individuals - Credo Reference". search.credoreference.com. Retrieved 2021-03-16.
13. Demetriou, A. (1998). Cognitive development. In A. Demetriou, W. Doise, K. F. M. van Lieshout (Eds.), Life-span developmental psychology, pp. 179-269. London: Wiley.
14. Kohlberg, Lawrence (1987). The Measurement of Moral Judgement. Cambridge: Cambridge University Press. ISBN 0-521-32565-X.
15. Bandura, Albert (1970). Social learning and personality development. Holt, Rinehart and Winston. ISBN 0-03-910038-3. OCLC 898963514.
16. Lievegoed, Bernard (1997). Phases: The Spiritual Rhythms of Adult Life. Forest Row, GB: Rudolf Steiner Press. ISBN 1-85584-056-1.
17. Maslow, Abraham H. (1943). "A theory of human motivation". Psychological Review. 50 (4): 370–396. CiteSeerX 10.1.1.334.7586. doi:10.1037/h0054346. hdl:10983/23610. ISSN 0033-295X. OCLC 1318836. Archived from the original on 2017-09-14. Retrieved 2007-03-13 – via psychclassics.yorku.ca.

• Developmental stage theories