Skip to ContentGo to accessibility page

Key Terms

age of consent
minimum age at which an individual can legally make decisions to engage in sexual behavior
body image
our mental image or representation of our body
clique
close group of three to a dozen or so friends
crowd
large social grouping of many dozens or more members in the social milieu of adolescents
cultural heritage
adaptations to the natural and social world that have shared meaning and are passed from generation to generation
de-idealization
tendency of adolescents to see a mismatch between the values their parents proclaim, the rules they put forward, and the way imperfect parents lead their own imperfect lives
friendship
intimate, emotionally close relationship between two individuals
gender intensification hypothesis
prediction that conforming to gender roles is of heightened relevance during adolescence
gender nonconforming behavior
behavior that does not match society’s expectations for the individual’s assigned gender
heteronormativity
idea that heterosexuality is the norm or preferred sexual orientation and that opposite-sex people are best suited for sexual and marital relationships
identity
individual’s complete sense of who they are, including their traits, capabilities, interests, values, and social roles
identity achievement
realization and commitment to a coherent understanding of oneself and our relationship with society after exploring various identities
identity diffusion
identity status in which the individual has low commitment and does not actively seek an identity; most closely aligns with Erikson’s role confusion
identity foreclosure
identity status in which an individual has shown an early commitment to an identity without any prior exploration
identity moratorium
stage in which individuals are actively exploring various identities but not declaring an identity to be fully formed
identity versus role confusion
fifth stage of Erikson’s psychosocial development, which involves forming a stable and whole identity by first exploring various roles and identities
possible selves
various identities toward which adolescents may work in the future
relational aggression
practice of including or excluding others or otherwise threatening a sense of belonging such as by spreading gossip
rite of passage
socially or culturally explicit markers to recognize the transitioning adolescent’s progress and achievement of adult status in one or more dimensions
romantic relationship
bond psychologically distinct from mere liking and including components of affection, intimacy, exclusivity, and interdependence
stereotype threat
phenomenon where individuals experience anxiety or fear of confirming negative stereotypes about their social group, which can impair their performance in academic or other achievement-related tasks
Citation/Attribution
Reuse and redistribution of this content in digital or print format:
  • This book may not be used in the training of large language models or otherwise be ingested into large language models or generative AI offerings without OpenStax's prior written permission.
  • This book uses the Creative Commons Attribution-NonCommercial-ShareAlike License, which means that you can reuse and modify the material only for noncommercial purposes, must attribute OpenStax, and must distribute any derivative works under the same license.
  • Any commercial printing of this textbook, including using a local or custom printer, must be approved by OpenStax, and proper citation provided.
  • OpenStax-copyrighted images, activities, assessments, and similar components of this book are subject to the same licensing – CC-BY-NC-SA. They can be used for noncommercial purposes with attribution. Commercial use requires permission.
  • Permission requests: Anyone who intends to incorporate this content (including text, images, and other components) into large language models, use it in AI offerings, use it commercially (including in print), and/or has questions about another use case is welcome to complete our reuse request form.
Attribution information
  • If you are redistributing all or part of this book in a noncommercial print format, then you must include on every physical page the following attribution:

    Access for free at https://openstax.org/books/lifespan-development/pages/1-what-does-psychology-say

  • If you are redistributing all or part of this book in a noncommercial digital format, then for every page that includes OpenStax content, you must license the derivative work under the same CC-BY-NC-SA license as the original, and include on every digital page view the following attribution:

    Access for free at https://openstax.org/books/lifespan-development/pages/1-what-does-psychology-say

Citation information

The information below includes the information needed to generate citations in most major styles (APA, MLA, etc.); you must reformat and organize the information as needed to fit the requirements of the style. Use the information below to generate a citation. We recommend using a citation tool such as this one.

© Apr 23, 2026 OpenStax. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike License. The OpenStax name, OpenStax logo, OpenStax book covers, OpenStax CNX name, and OpenStax CNX logo, and Rice University name, and Rice University logo trademarks, or wordmarks are not subject to the Creative Commons license and may not be reproduced without the prior and express written consent of Rice University.