en مطالعات روش‌شناختی methodology in rehabilitation پژوهشي Original Research Articles <div style="text-align: justify;"><strong>Objectives: </strong>The Micro Manual Muscle Tester (MMMT) is a Hand-Held Dynamometer (HHD). The current study aimed to evaluate the intra- and inter-rater reliability of this device.<br> <strong>Methods:</strong> To determine the reliability of the MMMT, two previously trained assessors to work with HHD performed HHD measurements on 7 muscle groups of the lower extremities (hip flexors, hip extensors, hip abductors, knee extensors, knee flexors, ankle plantar-, and dorsiflexors) using the make-test method. The study participants were evaluated thrice by two occupational therapists in 10 separate days.<br> <strong>Results: </strong>All the inter- and intra-correlations were reported as excellent (ICC>0.90), except for ICC2,3 in the hip flexor muscles; and ICC2,3 in the dorsiflexor muscles that were similarly good (ICC=0.75-0.89) at a high significance level (P˂0.001).<br> <strong>Discussion:</strong> The MMMT had an acceptable reliability. Furthermore, this device is useful for investigating changes in strength after rehabilitation interventions.</div> Muscles, Reliability, Cerebral Palsy 165 170 http://irj.uswr.ac.ir/browse.php?a_code=A-10-100-6&slc_lang=en&sid=1 Masoud Gharib gharib_masoud@yahoo.com Yes Department of Rehabilitation, Faculty of Paramedicine, Mazandaran University of Medical Sciences, Sari, Iran. Roshanak Vameghi r_vameghi@yahoo.com 0000-0002-7456-8008 No Pediatric Neurorehabilitation Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Mahyar Salavati mahyarsalavati@gmail.com 0000-0003-0567-4373 No Department of Physiotherapy, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Seyed Ali Hosseini alihosse@gmail.com No Pediatric Neurorehabilitation Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. Ahmad Saeedi a_saidee@yahoo.com No Department of Statistical Research and Information Technology, Institute for Research and Planning in Higher Education, Tehran, Iran.