This is the 4463rd most frequent Swedish word.
uppvisat
Displayed or demonstrated.
Here, 'uppvisat' is used to indicate something that has been demonstrated or shown by someone, emphasizing the quality of care demonstrated by 'Han'.
Han hade uppvisat stor omsorg i sitt arbete.
He had shown great care in his work.
In this case, 'uppvisade' is employed in the present tense to describe the action of showing or demonstrating a trait, directly attributable to 'Deltagarna'.
Deltagarna uppvisade en stark vilja att lära sig.
The participants exhibited a strong willingness to learn.
Here, 'uppvisat' conveys the idea of revealing or displaying a characteristic, this time referring to the 'Rapporten' and its flaws being evident.