system
Context: A psychological identity relates to self-image (one's mental model of oneself), self-esteem, and individuality. Consequently, Weinreich gives the definition "A person's identity is defined as the totality of one's self-construal, in which how one construes oneself in the present expresses the continuity between how one construes oneself as one was in the past and how one construes oneself as one aspires to be in the future"; this allows for definitions of aspects of identity, such as: "One's ethnic identity is defined as that part of the totality of one's self-construal made up of those dimensions that express the continuity between one's construal of past ancestry and one's future aspirations in relation to ethnicity" (Weinreich, 1986a). 

The description or representation of individual and group identity is a central task for psychologists, sociologists and anthropologists and those of other disciplines where "identity" needs to be mapped and defined. How should one describe the identity of another, in ways which encompass both their idiosyncratic qualities and their group memberships or identifications, both of which can shift according to circumstance? Following on from the work of Kelly, Erikson, Tajfel and others Weinreich's Identity Structure Analysis (ISA), is "a structural representation of the individual's existential experience, in which the relationships between self and other agents are organised in relatively stable structures over time … with the emphasis on the socio-cultural milieu in which self relates to other agents and institutions" (Weinreich and Saunderson, (eds) 2003, p1). Using constructs drawn from the salient discourses of the individual, the group and cultural norms, the practical operationalisation of ISA provides a methodology that maps how these are used by the individual, applied across time and milieus by the "situated self" to appraise self and other agents and institutions (for example, resulting in the individual's evaluation of self and significant others and institutions).[citation needed]
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What is the ISA?
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Identity Structure Analysis (ISA)
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Who started it?
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Weinreich
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What was the date of his quote?
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1986
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Who collaborated with him?
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Saunderson
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In what year?
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2003
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What did they emphasize?
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the socio-cultural milieu
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In relation to what?
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in which self relates to other agents and institutions
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Where did the constraints come from?
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from the salient discourses of the individual, the group and cultural norms,
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What is mapped?
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"identity"
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What example is given?
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esulting in the individual's evaluation of self and significant others and institutions
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Was there a citation for this?
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citation needed