That first article gives the results of a pilot study for the second linked paper so probably shouldn’t be considered additional evidence.
EDIT: Also, the results of the second study show that for the post writing period both the letter-writers and the control had the same response (within a half unit of standard deviation).
That first article gives the results of a pilot study for the second linked paper so probably shouldn’t be considered additional evidence.
EDIT: Also, the results of the second study show that for the post writing period both the letter-writers and the control had the same response (within a half unit of standard deviation).