Evidence or assertions? The outcomes of family preservation services

Article Abstract:

Critics argued that studies on the effect of family preservation services (FPS) in child welfare conducted in California and Illinois were invalid. They contended that improper design caused low statistical power and questioned the heterogenous nature of respondents and the use of placement as an outcome. However, they used assertions instead of evidence to undermine the studies and did not consider real world constraints and variations in FPS implementation.

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Evaluation outcomes of family preservation services and the way ahead: a reply to Littell

Article Abstract:

Critics contend that the experiments and conclusions related to studies on family preservation services conducted in California and Illinois are invalid. They pointed out that the evaluations undertaken were too simplistic and that researchers failed to control several factors in the service delivery context, consequently leading to major problems in internal validity. They added that client heterogeneity in both studies reduced statistical power.

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