Dr Lechner is a Senior Researcher, Head of Team “Scale Development and Documentation” at GESIS – Leibniz Institute for the Social Sciences in Mannheim, Germany, and Chief Scientist at vCoach GmbH, Munich, Germany. Dr. Lechner holds a PhD (Dr. phil.) in Developmental Psychology from Friedrich Schiller University Jena, Germany (2014). His research interests center around the (1) measurement and statistical modeling, (2) life span development, and (3) associations with life outcomes (e.g., educational achievement) of cognitive and socio-emotional skills. He is a member of the German Psychological Society (DPGs).