Visual perception and appraisal of persons with impairments: a randomised controlled field experiment using photo elicitation. - Reinhardt, Jan Dietrich; Ballert, Carolina Saskia; Fellinghauer, Bernd; Löötscher, Alexander; Gradinger, Felix; Hilfiker, Roger; Graf, Sibylle; Stucki, Gerold (Disability & Rehabilitation, 2011)