The Collective Self-Esteem Scale assesses individual differences in collective, rather than personal, self-esteem, with four subscales (membership esteem, public collective self-esteem, private collective self-esteem, and importance to identity).
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Instruments
The Twenty Statements Test (TST) is an instrument used to measure self concept. It was devised in 1954 by Manfred Kuhn & Thomas McPartland, with the aim of finding a standardized way to measure assumptions and self-attitudes.