I. -sh(ə)nə̇st noun
( -s )
1. : one especially given to introspection
2. : an adherent of introspectionism
II. adjective
or in·tro·spec·tion·is·tic | ̷ ̷ ̷ ̷ˌ ̷ ̷shə|nistik
: of or relating to introspectionism
a special introspectionist technique was devised — Ethel Albert