Student or Learner
In this section, we review evidence showing that the duration of effective daily practice that can be sustained for long periods is limited, and that according to teachers and training instructions, it is necessary to maintain full attention during the entire period of deliberate practice.
(The Role of Deliberate Practice in the Acquisition of Expert Performance; K. Anders Ericsson, Ralf Th. Krampe, and Clemens Tesch-Romer)
Is it possible to read it in two ways:
1) we review evidence showing that
2) we review evidence showing that
I saw him going home:
1) I was going home and that's when I saw him.
2) He was going home and I saw him doing that.
We review evidence showing that:
1) We review evidence and show that.
2) We review evidence that shows that.
- We review the evidence. The evidence we are reviewing [already] shows that ...
- We review the evidence. By reviewing it, we then show that ...
In my opinion, your original sentence means the first one. In order for it to mean the second, I would add a comma after "evidence" - "We review evidence, showing that ..."