HUMAN HANDEDNESS: A META-ANALYSIS 1 Running head: HUMAN HANDEDNESS: A META-ANALYSIS Human handedness: A meta-analysis Marietta Papadatou-Pastou 1 , Eleni Ntolka 1 , Judith Schmitz 2 , Maryanne Martin 3 , Marcus R. Munafò 4,5 , Sebastian Ocklenburg 6 *, Silvia Paracchini 2 * 1 School of Education, National and Kapodistrian University of Athens, Greece 2 School of Medicine, University of St Andrews, St. Andrews, UK 3 Department of Experimental Psychology, University of Oxford, UK 4 MRC Integrative Epidemiology Unit at the University of Bristol, UK 5 School of Psychological Science, University of Bristol, UK 6 Biopsychology, Department of Psychology, Institute of Cognitive Neuroscience, Ruhr University Bochum, Bochum, Germany Address for correspondence: Dr. Marietta Papadatou-Pastou, School of Education, National and Kapodistrian University of Athens, 13A Navarinou Str., Athens 160 80, Greece. Email: marietta.papadatou-pastou@seh.oxon.org, Tel: +30 210 3641712 *Both authors contributed equally © 2020, American Psychological Association. This paper is not the copy of record and may not exactly replicate the final, authoritative version of the article. Please do not copy or cite without authors' permission. The final article is available via its DOI: 10.1037/bul0000229