This paper reports on three recent investigations by the New York State Department of Transportation's Planning Research Unit into empirical and theoretical aspects of trade-off analysis, a multidimensional attitude scaling procedure. First, the possible influence of the length of the questionnaire was investigated. Fatigue bias was found to be substantial, and use of abbreviated questionnaires and a random order of items is suggested. Second, tests were made for a degradation in response accuracy, with substantially shortened questionnaires. No significant loss of information was found in reductions of up to 50 percent of a 10-matrix design. Third, the effects of different utility integration rules were studied. Some differences were found but they are too small to be of practical importance. The research concludes that the trade-off procedure is a powerful, robust approach that can be used with confidence. /Authors/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 171-176
  • Monograph Title: Transportation forecasting and travel behavior
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00196008
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Sep 15 1979 12:00AM