[Consistency and variability of intellectual and psychomotor abilities in aged people (author's transl)]

Several methods of statistical analyses, featuring as well group specific changes and intra-individual changes, in an investigation of intelligence, psychomotor abilities of 121 aged men and women over a period of 7 years, lead to results that there are many different aspects of consistancy and change. An attempt is made to discuss these results in the framework of differential and developmental psychological aspects.