METODOLOGICKÉ POZNÁMKY K LONGITUDINÁLNÍM STUDIÍM.

The paper deals with some methodological pitfalls of longitudinal research from the initial sample, determining the appropriate length of the examination, timing of data collection, controlling for effects not included in the research, to personnel matters related to ensuring the progress of longitudinal investigations. Problems related to results and „spin-off benefits‟ of longitudinal studies are also discussed. [ABSTRACT FROM AUTHOR]