en Clinical Neuroscience Clinical Neuroscience Original Original <div style="text-align: justify;"><span style="display: none;">&nbsp;</span><strong>Introduction</strong>: Reliable balance measures are crucial for effective stroke rehabilitation. This study examines the between-day and within-day reliabilities of the center of pressure (CoP) measures in chronic stroke survivors in different standing positions under the influence of motor and cognitive dual-tasking.<br> <strong>Methods</strong>: Sixteen people (49.31&plusmn;15.5 years, 5 females) with chronic stroke were assessed in two sessions, 48 hours apart. Participants completed three balance control conditions: Single-task, motor dual-task, and cognitive dual-task. They performed three trials of open-eye quiet standing and semi-tandem standing. Three trials of closed-eye quiet standing were conducted in the single-task condition. A 2-way random model of the intraclass correlation coefficient (ICC), standard error of measurement (SEM), and minimal detectable change (MDC) were calculated for CoP mean velocity, anterior-posterior (AP) and medial-lateral (ML) mean velocity, the standard deviation (SD) of AP and ML velocity, and sway area.<br> <strong>Results</strong>: Within-day ICC values were higher than between-day values (ICC: 0.78-0.96). Mean velocity and Mean&plusmn;SD of velocity in the AP direction showed the highest relative and absolute reliabilities in an open-eye quiet standing position (ICC: 0.82-0.92, SEM: 0.67-1.24). Dual-tasking could increase the reliability of the CoP measures, except for the sway area (ICC: 0.53-0.93 changed to 0.84-0.96). MDCs ranged from 1.03 to 7.77 mm/s for velocity-based variables.<br> <strong>Conclusion</strong>: Assessing the postural control system during dual-task conditions provides more reliable CoP measures, especially in a semi-tandem standing position. These findings can provide clinicians with valuable insights into detecting specific balance problems that post-stroke individuals encounter.</div> <span style="line-height:2;"><span style="font-family:Tahoma;"><span style="font-size:14px;"><span style="display: none;">&nbsp;</span></span></span></span> Reliability, Balance, Center of pressure (CoP) measures, Dual-task, Stroke 763 776 http://bcn.iums.ac.ir/browse.php?a_code=A-10-6958-1&slc_lang=en&sid=1 Mitra Parsa mitra.parsaa@gmail.com 13700319475328460054849 13700319475328460054849 No Neuromusculoskeletal Rehabilitation Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Iraj Abdollahi ir.abdollahi@uswr.ac.ir 13700319475328460054850 0009-0005-6600-8288 Yes Neuromusculoskeletal Rehabilitation Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Hossein Negahban honegahban@yahoo.com 13700319475328460054851 13700319475328460054851 No Department of Physiotherapy, School of Paramedical and Rehabilitation Sciences, Mashhad University of Medical Sciences, Mashhad, Iran. Mohammad Ali Sanjari sanjarima@iums.ac.ir 13700319475328460054852 13700319475328460054852 No Department of Basic Rehabilitation Sciences, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran. Enayatollah Bakhshi e.bakhshi@uswr.ac.ir 13700319475328460054853 13700319475328460054853 No Department of Biostatistics and Epidemiology, School of Social Sciences, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Haniyeh Fakur Haddadiyan fakur.physiotherapy@gmail.com 13700319475328460054854 0009-0000-3499-4750 No Department of Physiotherapy, School of Paramedical and Rehabilitation Sciences, Mashhad University of Medical Sciences, Mashhad, Iran.