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Cass identity model

The Cass identity model is one of the fundamental theories of LGBT identity development, developed in 1979 by Vivienne Cass.

Version
v1 · 2026-09-28 · History
Domain-specific #
8356
Domain group
Social Sciences
Origin domain
Psychology & Behavioral Sciences
Subdomains
Identity Development, Lgbt Psychology → Psychology & Behavioral Sciences

Core Idea

Cass identity model is treated here as the recurring cross-domain formal modeling identity summarized by this source-grounded definition: The Cass identity model is one of the fundamental theories of LGBT identity development, developed in 1979 by Vivienne Cass. The Cass identity model is one of the fundamental theories of LGBT identity development, developed in 1979 by Vivienne Cass. This model was one of the first to treat LGBTQIA+ people as normal in a heterosexist society and in a climate of homophobia and biphobia instead of treating homosexuality and bisexuality themselves as a problem.

How would you explain it like I'm…

Six Steps to Knowing Yourself

When some people start to realize they might be gay or bisexual, they often go through a series of steps in how they feel about it. A scientist named Vivienne Cass described six steps, starting with wondering 'Could I be?' and later realizing 'I'm not the only one.' People usually go through the steps in order, but sometimes they come back to an earlier step.

The Six-Stage Identity Journey

The Cass identity model is one of the first and most important ideas about how LGBT people come to understand who they are. It was created in 1979 by Vivienne Cass. She described six stages that people often go through in order, though some people come back to earlier stages later in life. In the first stage, called identity confusion, a person first notices same-gender or bisexual feelings and wonders, 'Could I be queer?'. By the third stage, identity tolerance, the person realizes they are 'not the only one'. The model was important because it treated LGBT people as normal and saw the problem in a society that was unfair to them.

Cass's Six-Stage Identity Model

The Cass identity model is one of the foundational theories of LGBT identity development, proposed by Vivienne Cass in 1979. It describes six sequential stages through which a person comes to hold a lesbian, gay, or bisexual identity, though people can revisit earlier stages at different points in life. The first stage, identity confusion, begins with the first awareness of same-sex or bisexual thoughts, feelings, and attractions and the question 'Could I be queer?' In the third stage, identity tolerance, the person understands they are 'not the only one.' The model was one of the first to treat LGBT people as normal people living in a heterosexist, homophobic, and biphobic society, rather than treating homosexuality or bisexuality as the problem.

 

The Cass identity model is a stage model of LGBT identity development proposed by Vivienne Cass in 1979 and regarded as one of the field's fundamental theories. Cass described six sequential stages through which a person develops an LGBTQIA+ identity, while allowing that individuals may revisit stages at different points in their lives. The first stage, identity confusion, begins with the person's first awareness of homosexual or bisexual thoughts, feelings, and attractions, captured by the question 'Could I be queer?'. In the third stage, identity tolerance, the person comes to understand that they are 'not the only one'. Historically, the model's significance lies in its framing: it was one of the first to treat LGBTQIA+ people as normal individuals developing within a heterosexist society and a climate of homophobia and biphobia, rather than treating homosexuality or bisexuality as pathological. To count as an application of this model, an account must use Cass's specific staged developmental framework, not merely discuss coming out or identity in general.

Scope of Application

  • Identity synthesis. Possible responses can be: continues to be angry at heterosexism, but with decreased intensity, or allows trust of others to increase and build.

  • Criticisms of the model. The nature of the social stigma and its management practices have changed since the inception of the model.

  • Identity confusion. The people typically feel confused and experience turmoil.

  • Identity confusion. In the first stage, identity confusion, the person is amazed to think of themselves as a queer person. "Could I be queer?" This stage begins with the person's first awareness of.

  • Identity confusion. To the question "Who am I?", the answers can be acceptance, psychological self-denial and repression, or rejection.

Clarity

A clear use of Cass identity model names the carrier, the operative relation, and the conditions under which the source treats the identity as present. The minimal definition is The Cass identity model is one of the fundamental theories of LGBT identity development, developed in 1979 by Vivienne Cass.

Manages Complexity

Cass identity model compresses multiple cross-domain formal modeling details into a stable diagnostic relation. The source shows both the central mechanism—the task is to decrease social alienation by seeking out homosexual or bisexual people.—and the practical consequence—cass described a process of six stages of LGBTQIA+ identity development. This compression makes cases comparable while leaving parameters, conventions, exceptions, and evidential quality explicit.

Abstract Reasoning

  1. Type the carrier. Identify the cross-domain formal modeling entities to which the claim applies.
  2. State the relation. Use the source-grounded identity: The Cass identity model is one of the fundamental theories of LGBT identity development, developed in 1979 by Vivienne Cass.
  3. Check operation and conditions. Possible responses can be: continues to be angry at heterosexism, but with decreased intensity, or allows trust of others to increase and build.
  4. Demand recognition evidence.

Knowledge Transfer

Within the home domain. Knowledge about Cass identity model transfers literally when a new case preserves the same carrier type, relation, and recognition test. Possible responses can be: continues to be angry at heterosexism, but with decreased intensity, or allows trust of others to increase and build. The nature of the social stigma and its management practices have changed since the inception of the model. Beyond the home domain. No canonical parent is asserted for Cass identity model.

Neighborhood in Abstraction Space

Cass identity model sits in a sparse region of the domain-specific corpus (62nd percentile for distinctiveness): few abstractions share its structure, so a faithful description tends to retrieve it precisely.

Family — Unclustered & Miscellaneous (2551 abstractions)

Nearest neighbors

Computed from structural-signature embeddings · 2026-10-08