Why mixed practice
Mixed practice removes the chapter label that has been telling you which skill to use. The remaining errors are usually portable: an overextended inference, a device named without function, narrow evidence, weak commentary, or a missed structural change. These sets mix genre and task so you have to diagnose the reading problem before solving it. Review each miss by error type and trace repeated errors back to the skill that owns them.
Scope errors
Scope and inference errors, built in Chapter 10, do not stay inside multiple-choice questions. The same mistakes show up in free-response commentary: a claim accurate for one line stretched to cover an entire passage, or a reasonable first inference extended one step further than the text can support. In mixed practice, ask the same two questions regardless of task or genre:
- Does the size of this claim match the size of the evidence?
- Does this inference stop where the text's support actually stops?
Function errors
Naming a technique without explaining its function, and offering evidence too general to be specific to this passage, are the two most frequent patterns in released scoring evidence after complexity itself. Both persist because they are easy to produce under time pressure: a device name or a broad claim requires less specific recall than a precise, passage-bound observation. Mixed practice is where these habits either get corrected or get confirmed as a standing weakness, because nothing in the format signals which skill a given question is testing.
Complexity errors
The two highest-priority patterns from Chapter 7 and Chapter 14, flattening a genuine tension into one simple reading, and presenting evidence without the commentary that connects it to a claim, remain the most consistent gap between a developing response and a strong one. Mixed sets place these errors next to unrelated content on purpose. If a response resolves tension into a single reading in a poetry question and again in a prose question, the pattern is a skill problem, not a passage problem, and the correction belongs in the error log the same way regardless of which passage triggered it.
A student flattens a character's mixed motives into a single trait in a Part II drill, then does the same thing to a speaker's mixed feelings in a poetry set two chapters later. Read separately, these look like two unrelated misses on two unrelated passages. Read together, they are the same error: a reluctance to let a claim hold two things at once. The mixed-practice format is built specifically to make that kind of pattern visible.
The mixed diagnostic set
The set in this unit mixes genre and task without labeling which skill each item tests. It uses an excerpt from Hamlet and an excerpt from The Emperor Jones. Diagnose before you solve: identify what kind of reading or reasoning error a wrong answer represents before moving to the next item. For each miss, classify the error as scope, function, degree, inference, or complexity before checking the correction.
The two Emperor Jones blocks use the same excerpt to test different decisions. They are not presented as one 16-question AP passage set; actual Section I passage sets contain 8 to 13 questions. After the multiple-choice items, a short free-response paragraph and three micro-drills ask you to apply the same diagnostic habits to your own writing.