This may help whittle down your search:

go to: http://forums.psychcentral.com/memberlist.php?do=search

scroll to Member Since

Add these dates or any date you wish to search. This gives members who have posted (including newbies) from October 1, 2016 to October 24, 2016. It does bring the listing down to a more manageble size and by the # of posts a member has you can see who are newbies.

is After
2016-10-01

is Before
2016-10-24