@article{KahlertBrand2011,
  author    = {Kahlert, Daniela and Brand, Ralf},
  title     = {Questionnaires for assessing physical activity different response scale categories influence responses concerning health- and sport-related cognitions},
  series = {Zeitschrift f{\"u}r Gesundheitspsychologie},
  volume    = {19},
  journal   = {Zeitschrift f{\"u}r Gesundheitspsychologie},
  number    = {2},
  publisher = {Hogrefe},
  address   = {G{\"o}ttingen},
  issn      = {0943-8149},
  doi       = {10.1026/0943-8149/a000044},
  pages     = {96 -- 100},
  year      = {2011},
  abstract  = {The present study examines whether the use of different frequency scales in questionnaires about physical activity influences respondents' own estimation of their activity, as well as subsequent measurements of health- und sport-related cognitions and evaluations. Using a randomized research design we recruited a sample of 118 participants. One group received a high frequency scale for assessing their exercise frequency with the response categories "never", "less often", "once a month", "once a week", or "most days." The other group answered with a medium frequency scale with the alternatives "never", "less often", " once every few months", "once a month", and " once a week or more often." As dependent variables all participants judged the subjective importance of physical activity and their health-related quality of life (WHO-QOL-bref). Results indicate the expected response errors, owing to the fact that using a high-frequency scale produces higher levels of self-reported physical activity (Cramer's V = .30). Corresponding to this the subjective importance of physical activity increased (d = .37) and the health-related quality of life was judged to be better (d = .36). Such artefacts might be eliminated by using standardized formulations such as "I exercise... times per week/month for... minutes."},
  language  = {de}
}
@article{KahlertBrand2011,
  author    = {Kahlert, Daniela and Brand, Ralf},
  title     = {Comparing self-report and accelerometry data a contribution to the validation of the MoMo-Physical activity questionnaire for children and adolescents},
  series = {Deutsche Zeitschrift f{\"u}r Sportmedizin : offizielles Organ der Deutschen Gesellschaft f{\"u}r Sportmedizin und Pr{\"a}vention (Deutscher Sport{\"a}rztebund) e.V. (DGSP) und Weiterbildungsorgan der {\"O}sterreichischen Gesellschaft f{\"u}r Sportmedizin und Pr{\"a}vention},
  volume    = {62},
  journal   = {Deutsche Zeitschrift f{\"u}r Sportmedizin : offizielles Organ der Deutschen Gesellschaft f{\"u}r Sportmedizin und Pr{\"a}vention (Deutscher Sport{\"a}rztebund) e.V. (DGSP) und Weiterbildungsorgan der {\"O}sterreichischen Gesellschaft f{\"u}r Sportmedizin und Pr{\"a}vention},
  number    = {2},
  publisher = {WWF-Verl.-Ges.},
  address   = {Greven},
  issn      = {0344-5925},
  pages     = {36 -- +},
  year      = {2011},
  abstract  = {According to the results of the German Health Interview and Examination Survey for Children and Adolescents (KiGGS) published in 2009, only 5\% to 8\% of the 15-17-year-old adolescents reach the current recommendations on health-enhancing physical activity This result (besides others in the survey) rests on data measured with the 25-item physical activity questionnaire for children and adolescents (MoMo-AFB). The present study compares two different methods of assessing physical activity with the purpose of testing the validity of the MoMo-AFB self-report. First, we measured the physical activity status of 73 15 to 18-year-old pupils (32 boys and 41 girls) over seven days via objective accelerometry (ActiGraph GT1M), then the pupils completed the MoMo-AFB for the same (previous) period. Results show that using the MoMo-AFB leads to higher levels of self-reported physical activity than measuring it with accelerometers. Furthermore, only the MoMo-AFB subscale MVPA (moderate-to-vigorous physical activity), that uses two single items to decide whether the health-enhancing physical activity recommendation is reached or failed, corresponds statistically significantly with the accelerometry data. For all other subscales (e.g. school- or leisure time activity), we found no agreement. Further research, first of all on the measurement quality of the MoMo-AFB but also on the physical (in)activity status of children and adolescents, is needed.},
  language  = {de}
}
@inproceedings{GruberBraumannKahlertetal.2011,
  author    = {Gruber, W. and Braumann, K. M. and Kahlert, Daniela and Brand, Ralf and Schwarz, C. and Staab, D.},
  title     = {Do interavenous antibiotic therapies increase level of physical activity in CF?},
  series = {Pediatric pulmonology},
  booktitle = {Pediatric pulmonology},
  number    = {3},
  publisher = {Wiley-Blackwell},
  address   = {Malden},
  issn      = {8755-6863},
  pages     = {355 -- 355},
  year      = {2011},
  language  = {en}
}
@article{SchweizerPlessnerKahlertetal.2011,
  author    = {Schweizer, Geoffrey and Plessner, Henning and Kahlert, Daniela and Brand, Ralf},
  title     = {A Video-Based training method for improving soccer referees' intuitive decision-making skills},
  series = {Journal of applied sport psychology},
  volume    = {23},
  journal   = {Journal of applied sport psychology},
  number    = {4},
  publisher = {Routledge, Taylor \& Francis Group},
  address   = {Abingdon},
  issn      = {1041-3200},
  doi       = {10.1080/10413200.2011.555346},
  pages     = {429 -- 442},
  year      = {2011},
  abstract  = {We present a video-based online training-tool (SET, for Schiedsrichter-Entscheidungs-Training, in German) for improving soccer referees' decisions. We assume that referees' decision-making in contact situations mainly relies on intuitive processing. For improving intuitive decisions, feedback on the correctness of decisions is essential; explanations are not required (Hogarth, 2008). Referees participating in SET watch videos, make decisions, and receive feedback. Evidence of the training's effectiveness was obtained in two experiments with soccer players and expert referees. Immediate feedback on the correctness of decisions without further explanations was sufficient for increasing decision accuracy. Results illustrate that SET is a promising tool for complementing referees' training.},
  language  = {en}
}
@article{JekaucWagnerKahlertetal.2013,
  author    = {Jekauc, Darko and Wagner, Matthias O. and Kahlert, Daniela and Woll, Alexander},
  title     = {Reliability and validity of MoMo-Physical-Activity-Questionnaire for Adolescents (MoMo-AFB)},
  series = {Diagnostica},
  volume    = {59},
  journal   = {Diagnostica},
  number    = {2},
  publisher = {Hogrefe},
  address   = {G{\"o}ttingen},
  issn      = {0012-1924},
  doi       = {10.1026/0012-1924/a000083},
  pages     = {100 -- 111},
  year      = {2013},
  abstract  = {This paper presents the psychometric properties of the MoMo-AFB (Bos, Worth, Opper, Oberger \& Woll, 2009), a questionnaire designed to measure the physical activity of children and adolescents. The MoMo-AFB consists of 28 items, covering the fields of everyday physical activity, sports within and outside of organised clubs, physical education as well as compliance with physical activity guidelines. A study was conducted with 109 boys and 87 girls aged between 9 and 17 years. The MoMo-AFB was given on two separate occasions to evaluate reliability and was compared with accelerometry data of ActiGraph GT1X to evaluate validity. The overall kappa/weighted kappa coefficient for the one-week testretest reliability was .66 (SD = .19) and the overall intraclass correlation (ICC) .68. Self-reported and accelerometer-measured average weekly time spent performing moderate to vigorous physical activity were significantly correlated (Spearman r = .29). Regarding reliability and validity, the MoMo-AFB is comparable with other international published physical activity questionnaires for adolescents.},
  language  = {de}
}
@phdthesis{Kahlert2011,
  author    = {Kahlert, Daniela},
  title     = {Die Bedeutung optimistischer Attributionen f{\"u}r die Aufrechterhaltung sporticher Aktivit{\"a}t},
  address   = {Potsdam},
  pages     = {90 S.},
  year      = {2011},
  language  = {de}
}
@misc{SchweizerBluemkeBrandetal.2010,
  author    = {Schweizer, Geoffrey and Bluemke, Matthias and Brand, Ralf and Kahlert, Daniela},
  title     = {Exercise might be good for me, but I don't feel good about it : do automatic associations predict exercise behavior?},
  url       = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-42510},
  year      = {2010},
  abstract  = {Models employed in exercise psychology highlight the role of reflective processes for explaining behavior change. However, as discussed in social cognition literature, information-processing models also consider automatic processes (dual-process models). To examine the relevance of automatic processing in exercise psychology, we used a priming task to assess the automatic evaluations of exercise stimuli in physically active sport and exercise majors (n = 32), physically active nonsport majors (n = 31), and inactive students (n = 31). Results showed that physically active students responded faster to positive words after exercise primes, whereas inactive students responded more rapidly to negative words. Priming task reaction times were successfully used to predict reported amounts of exercise in an ordinal regression model. Findings were obtained only with experiential items reflecting negative and positive consequences of exercise. The results illustrate the potential importance of dual-process models in exercise psychology.},
  language  = {en}
}