Figure 6.

Displayed are the differences in SDI based on standardized SDI_NuT-values in the three percentiles. The above curve (full line) represents the first third (0–33%) of SDI_NuT, the middle curve (dotted) the second third (34–66%), and the lowest curve (full-dotted) represents the third percentile (67–100%). It can be seen that the biggest difference or near-constancy in motivational behavior occur in the extremes of lowest and highest SDI_NuT-values, respectively. That means on the one hand, that pupils who are exceptionally extrinsically motived in the classroom, achieve the highest relative increase in intrinsic motivation during the outdoor teaching session, and on the other hand, that pupils, who are highly self-regulated in science class at school, show a merely slightly more extrinsically motivated behavior in the outdoors, albeit that change is relatively small and negligible as compared to the first third of lowest motivation values.