Two experiments examined metamemory ratings following differing amounts of
retroactive interference for paired associates. Participants made both feel
ing of knowing (FOK) ratings and judgments of learning (JOLs) for first-lis
t responses after learning different types of second lists. Both types of r
atings were higher when stimuli were repeated and responses were associates
across two Lists than when stimuli were repeated and responses were differ
ent. Repetition of either the stimuli or the responses across lists produce
d lower ratings than nonrepetition, especially for recalled responses. The
results provided support for competition as an important factor in JOLs and
FOKs following interference.