error variance

the element of variability in a score that is produced by extraneous factors, such as measurement imprecision, and is not attributable to the independent variable or other controlled experimental manipulations. Error variance usually indicates how much random fluctuation is expected within scores and often forms part of the denominator of test statistics, such as the F ratio in an analysis of variance. Also called residual error; residual variance; unexplained variance.

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Psychology term of the day

February 24th 2025

foster care

temporary care provided to children in settings outside their family of origin and by individuals other than their natural or adoptive parents. Foster care is intended to protect children whose parents are unavailable, abusive, or incapable of proper care, with the ultimate goal being to find a secure and permanent home. Typically, a child is placed with a family approved for foster care and paid a fee for such by a public child welfare agency. Although these foster home arrangements are most common, children may also be placed in group homes or institutions. See also adult foster care.