self-selection bias

a type of bias that can arise when study participants choose their own treatment conditions, rather than being randomly assigned. In such cases, it is impossible to state unambiguously that a study result is due to the treatment condition and not to the preexisting characteristics of those individuals who chose to be in this condition. Also called self-selection effect. See also sampling bias.

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Psychology term of the day

December 26th 2024

false self

in the object relations theory of British psychoanalyst Donald Winnicott (1896–1971), the self that develops as a defense against impingements and in adaptation to the environment. This contrasts with the true self, which develops in an environment that adapts to the infant and allows him or her to discover and express true impulses.