Comprehension monitoring is conceptualized as a metacognitive process
involving monitoring and control of ongoing discourse processing. The
error-detection paradigm was used in an experiment in which 315 7th-,
9th-, and 11th-grade students of low-to-high reading ability monitored
and controlled their reading as they searched three times through a t
ext. Search One showed that although all readers failed to monitor man
y problems; monitoring at lexical, syntactic, and particularly semanti
c levels increased with age and reading ability. Monitoring for low-ab
ility readers remained low at all three grades. Search live showed an
asymmetry in the effects of instruction to search for errors, and some
students exhibited constraints on monitoring and control. Finally, Se
arch Three showed that some students had knowledge necessary to monito
r more errors but failed to apply that knowledge to the text.