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Evolutionary Psychology01:20

Evolutionary Psychology

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Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the...
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Three Developmental Domains01:29

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Human development is typically examined across three main domains: physical, cognitive, and socio-emotional. These domains represent the significant areas of change and continuity throughout the lifespan, from infancy to late adulthood.
Physical Development
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In a study where individuals posing as strangers offered compliments and proposed casual sex to students, the responses differed significantly based on gender. Not a single woman accepted the proposal, while 70% of the men agreed. This outcome provides a useful scenario to explore through the lens of evolutionary psychology and social learning theory, highlighting the diverse perspectives on human sexual behaviors.
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Developmental psychology explores the changes and continuities in human abilities throughout life, encompassing physical, cognitive, linguistic, and social dimensions. Human development is not restricted to growth, but includes aspects of decline, particularly in physical abilities as individuals age. Developmental psychologists seek to understand how people change as they age and how their mental and social skills evolve.Developmental MilestonesA key concept in developmental psychology is...
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Humanistic Psychology01:24

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Humanistic psychology emerged in the mid-20th century as a response to the deterministic and pessimistic nature of behaviorism and psychoanalysis. While behaviorism focused on observable behaviors influenced by the environment and psychoanalysis delved into unconscious motivations, both theories suggested that human actions lacked free will. In contrast, humanistic psychology offers a perspective that emphasizes the innate potential for goodness and growth within every individual.
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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
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Updated: Dec 25, 2025

Measuring Cardiac Autonomic Nervous System ANS Activity in Toddlers - Resting and Developmental Challenges
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DHEAS and Human Development: An Evolutionary Perspective.

Benjamin Campbell1

  • 1Department of Anthropology, University of Wisconsin-Milwaukee, Milwaukee, WI, United States.

Frontiers in Endocrinology
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Summary
This summary is machine-generated.

Adrenarche, a rise in DHEA/DHEAS unique to humans and apes, may link diet and brain development. This hormone

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DHEASbraingrowth and developmenthuman evolutionmiddle childhood

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Area of Science:

  • Evolutionary biology
  • Neuroscience
  • Endocrinology

Background:

  • Adrenarche, the post-natal rise of dehydroepiandrosterone (DHEA) and dehydroepiandrosterone sulfate (DHEAS), is a unique human and African ape phenomenon.
  • Recent research links DHEA to human brain development, specifically the left dorsolateral prefrontal cortex (LDPFC) and right temporoparietal junction (rTPJ), crucial for cognitive and social functions during childhood.

Purpose of the Study:

  • To explore the role of DHEA/DHEAS in human brain evolution, particularly during the 5-to-8 year transition.
  • To investigate the potential link between dietary protein, meat consumption, and DHEAS production impacting brain development.

Main Methods:

  • Comparative analysis of adrenarche timing and associated developmental milestones in humans and chimpanzees.
  • Review of existing literature on DHEA, IGF-1, and adrenal zona reticularis (ZR) development.
  • Hypothesizing the influence of nutrition and energetics on adrenarche and middle childhood onset.

Main Results:

  • DHEA is associated with LDPFC development (ages 4-8) and rTPJ development (ages 7-12) in humans.
  • Increased dietary protein may elevate DHEAS, potentially linking meat consumption to brain development.
  • Zona reticularis emergence and DHEA/S production coincide with weaning and synaptogenesis peaks, differing between humans and chimpanzees.

Conclusions:

  • DHEA may have significantly contributed to human brain evolution, particularly in areas related to cognitive and social development.
  • Human brain maturation, unlike chimpanzees', might involve post-weaning social provisioning, influenced by diet.
  • Further research on adrenarche in African apes and subsistence populations is crucial to understand the roles of nutrition and evolution in human development.