en دیگر Other پژوهشي اصیل Original Research <p><strong>Background and Objectives</strong>: Students with learning difficulties encounter poorer school outcomes and major problems in learning. Researchers investigated the factors in preschool stage that will help to diagnosis learning problems.<br> &nbsp;<strong>Methods:</strong> A meta-analytic review provides means for assessing which factors show the strongest effects on long-term outcomes.<br> <strong>Results</strong>: This article presents a meta-analysis of main screening tests of learning disabilities examining 3 sources and 27 samples published from 2000 to 2017 in Iran. Fourteen screening tests were identified among 25 studies. The combined effect size for detection were 24.262 (CI: 19.111-29.412), respectively. Among them, the Kaufman&#39;s Neurological-Clinical Diagnostics Battery is the best alternative for preschoolers screening.<br> <strong>Conclusion</strong>: Implications for future research and practice are considered</p> Learning readiness, Preschool children, Learning disabilities 24 29 http://ijca.iums.ac.ir/browse.php?a_code=A-10-46-1&slc_lang=en&sid=1 Mahnaz Akhavan Tafti makhavan@alzahra.ac.ir 1003194753284600474 1003194753284600474 Yes Alzahra University, Tehran, Iran Saleheh piryaei s.piryaei@alzahra.ac.ir 1003194753284600475 1003194753284600475 No Alzahra University, Tehran, Iran