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. 2018 Sep 19;9:1616. doi: 10.3389/fpsyg.2018.01616

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Copyright © 2018 Tretter and Löffler-Stastka.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Interplay in research between theory and “empirics” and from a qualitative level to a quantitative (formalized) level of essential constructs, with focus on qualitative theory of the mental.