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. 2018 Aug 28;9:1575. doi: 10.3389/fpsyg.2018.01575

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Copyright © 2018 Monteiro, Teixeira, Travassos, Duarte-Mendes, Moutão, Machado and Cid.

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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Individual standardized parameters of the initial hypothetical model (calibration sample). MCSYS from 2 to 9 representing the items of the scale. COM, competence; AUT, autonomy; REL, relatedness; IDR, identified regulation; IGR, integrated regulation; IM, intrinsic motivation; perceived effort, from 1 to 3 representing the items of the scale; E, measurement errors of each of the items and factor.