Researchers of metacognitive development in adulthood have exclusively used extreme-age-groups designs. We used a full cross-sectional sample (N = 285, age range: 18-80) to evaluate how associative relatedness and encoding strategies influence judgments of learning (JOLs) in adulthood. Participants studied related and unrelated word pairs and made JOLs. After a cued-recall test, retrospective item strategy reports were collected. Results revealed developmental patterns not available from previous studies (e.g., a linear age-related increase in aggregate JOL resolution across the life span). They also demonstrated the value of investigating multiple cues' influences on JOLs. Multilevel regression models showed that both relatedness and effective strategy use positively and independently influenced JOLs. Furthermore, effective strategy use was responsible for higher resolution of JOLs for unrelated items (relative to related items). The effects of relatedness and strategy use with JOLs did not interact with age. The monitoring of learning is spared by adult development despite age differences in learning itself. (Contains 3 figures, 2 tables, and 5 footnotes.)