Studied immediate and 2-wk retention as a function of 3 levels of text readability and 2 levels of inserted postquestion difficulty. 28 undergraduates served as Ss. The inserted postquestion treatment was modified to permit review of text after question answering. A traditional control group was required to read without marking lesson pages; a 2nd control group was permitted complete freedom. Both inserted postquestion treatments produced significantly inferior acquisition of content incidental to the inserted postquestions for 2 lessons having below-average readability. For an average readability lesson, only the difficult inserted postquestions produced lower acquisition. Treatment differences diminished to nonsignificant levels on 2-wk retention. Learning was correlated with anxiety (Alpert-Haber Achievement Anxiety Test) and self-confidence in the 2 lower-than-average readability lessons but not in the average one. (19 ref) (PsycINFO Database Record (c) 2012 APA, all rights reserved)