@article{KahlertBrand2011,
  author    = {Daniela Kahlert and Ralf Brand},
  title     = {Questionnaires for assessing physical activity different response scale categories influence responses concerning health- and sport-related cognitions},
  journal   = {Zeitschrift f{\"u}r Gesundheitspsychologie},
  volume    = {19},
  number    = {2},
  pages     = {96 -- 100},
  doi       = {10.1026/0943-8149/a000044},
  year      = {2011},
}