@article{ElsnerSchellhas2012,
  author    = {Elsner, Birgit and Schellhas, Bernd},
  title     = {The acquisition of flexible tool use in preschoolers the impact of prior experience},
  series = {Zeitschrift f{\"u}r Psychologie = Journal of psychology},
  volume    = {220},
  journal   = {Zeitschrift f{\"u}r Psychologie = Journal of psychology},
  number    = {1},
  publisher = {Hogrefe},
  address   = {G{\"o}ttingen},
  issn      = {2190-8370},
  doi       = {10.1027/2151-2604/a000090},
  pages     = {44 -- 49},
  year      = {2012},
  abstract  = {To investigate how preschoolers acquire a tool use strategy and how they adapt their tool use to a changed situation, 2- to 4-year-olds were asked to retrieve chips from a transparent box with a rod, either by stabbing and lifting through a top opening or by pushing through a front and a back opening. In both conditions, about 40\% of the children acquired effective tool use by individual learning, and 90\% of the other children learned this by observing only one demonstration. When confronted with a changed situation (i.e., previous opening covered, alternative opening uncovered), children perseverated with the recently learned, but now ineffective tool use strategy. Neither age nor acquisition type of the first strategy affected preschoolers' perseverations. Results indicate that prior tool use experiences have differential effects in situations that require either transferring known functions to novel objects or using a familiar tool for an alternative purpose.},
  language  = {en}
}
@article{GrundmannEdelsteinHofmannetal.1995,
  author    = {Grundmann, Matthias and Edelstein, Wolfgang and Hofmann, V. and Schellhas, Bernd},
  title     = {The effect of non-normative childhood experiences on the emergence of risk factors in the development of the child},
  year      = {1995},
  language  = {en}
}
@article{HofmannSchellhasGrundmannetal.1995,
  author    = {Hofmann, V. and Schellhas, Bernd and Grundmann, Matthias and Edelstein, Wolfgang},
  title     = {Developmental dynamics : stability, antecedents and consequences of depressive reactions},
  year      = {1995},
  language  = {en}
}
@article{RauhSchellhasGoeggerle1996,
  author    = {Rauh, Hellgard and Schellhas, Bernd and G{\"o}ggerle, Stephanie},
  title     = {Diachronic developmental assessment of mentally handicapped young children},
  year      = {1996},
  language  = {en}
}
@article{SchellhasHofmannGrundmannetal.1995,
  author    = {Schellhas, Bernd and Hofmann, V. and Grundmann, Matthias and Edelstein, Wolfgang},
  title     = {Developmental dynamics : a longitudinal study of anxiety},
  year      = {1995},
  language  = {en}
}