The third-seeded Colonials, now 20-5, led by eight points at the half, but went on a 17-9 run to open the second half and extend its lead to 16 at 45-29 with 11 minutes to play.
Sixth-seeded PSC was never closer than 15 points the rest of the way, and ends its season at 11-13 under coach Marti Kingsley.
WCSU was led by Linda Zapor with 15 points and Amy Matthews with 12. In addition to Shapiro, PSC got eight points apiece from Becky Morse (Sterling, MA) and Jackie
Blanchard (Plymouth, MA).
The Colonials advance to the LEC semi-finals Friday at Gorham, ME.