For the psychologists S. van Bruggen, C. Bode, P.M. ten Klooster and L. Lenferink Noordman English Translations corrected their academic, English article ‘Reliability and validity of the Dutch translation of the Filial Maturity Measure in informal care givers’. This article reports on a research project regarding the reliability and validity of a Dutch translation of the ten- part Filial Maturity Measure (FMM), when used as an assessment tool by Dutch informal care givers who look after their father or mother.