Science and Education Publishing American Journal of Sports Science and Medicine 2333-4606 2 6A 2014 12 31 Acquisition a Baseball-Pitch through Observation: What Information Is Extracted? 18 21 EN Saeed Ghorbani Institute of Sport Sciences, University of Oldenburg, Oldenburg, Germany Andreas Bund AJSSM201426A5 10.12691/ajssm-2-6A-5 2014 11 20 2014 12 15 2014 12 31 The purpose of the present study was to compare the relative effects of observing video, stick figure and point-light model demonstrations on acquisition a Baseball pitch. Participants (ns = 41) in demonstration and control groups performed 5 trials in pretest, three blocks of 10 trials in acquisition phase, and two retention tests of 5 trials in 10 minutes and one week later. Participants´ performances were assessed by two raters at the level of overall movement and individual movement phases. Results showed similarities between demonstration groups in acquisition phase and early retention test. Participants showed a significant improvement in stride and follow-through phases from pretest to acquisition blocks. The findings are discussed in terms of theoretical and methodological backgrounds.