AP Psychology — cognition

Unit 2 of AP Psychology covers memory, thinking and testing, and is worth between 15 and 25 percent of the exam. This set works through ten of its ideas, one question each, and almost all of them are asked through a described experiment rather than a definition — because the exam does that, and because the interesting part of this unit is usually what a result rules out.

Several questions are built so that the design itself does the teaching. The encoding question gives two groups the same forty words for the same length of time, one counting vowels and one judging whether each word fits a sentence, with neither group told a test was coming. Everything is held constant except what the task forced the participant to notice — and the group that had to consider meaning recalls far more, without ever intending to. The working-memory question gives a pattern rather than a fact: repeating a nonsense syllable wrecks digit recall, mentally rotating a shape barely touches it, and doing both is worse than either. That two tasks collide when they involve the same kind of material and not otherwise is the evidence for separate verbal and visual-spatial subsystems. The diving question is the same trick again: neither setting is better in itself, so the advantage belongs to the match between learning and recall, which is what the encoding specificity principle claims.

The interference question is included because the two terms are constantly swapped. A student learns French on Monday, Spanish on Tuesday, and is tested on the FRENCH — new material reaching backwards onto old is retroactive interference. The reliable method is to ask which list is being tested rather than which one is intruding.

Two items concern judgment rather than memory. Asked whether tornadoes or asthma kills more people each year, most say tornadoes, because tornadoes are reported and asthma deaths are not: availability substitutes ease of recall for frequency, and ease of recall tracks coverage. And a procedure described as having a ninety percent survival rate is accepted far more often than the same procedure described as having a ten percent mortality rate — identical information, opposite wording, different decision.

The last question is the one worth carrying furthest. A test can give almost exactly the same score a month apart, and agree with itself between its halves, and still predict nothing at all. That test is reliable and invalid, and the combination is common: a bathroom scale reading five pounds over is perfectly consistent. The reverse — valid but unreliable — cannot happen, because a measure whose readings jump about is not tracking anything.

Nothing here reproduces any published test item, norm or diagnostic criterion, and every scenario is invented and said so in the question. Where a real study established an effect, it is named in the explanation for what it actually did.

• Explain why encoding for meaning outperforms attention to a word's surface, even without any intention to remember
• Identify a memory store from the way its capacity and duration trade against one another
• Infer separate working-memory subsystems from which secondary tasks interfere and which do not
• Apply the encoding specificity principle, recognizing that the advantage lies in the match rather than in either condition
• Tell proactive from retroactive interference by asking which material is being tested
• Explain how information encountered after an event can be absorbed into the memory of it
• Distinguish the availability heuristic from the representativeness heuristic by what each judgment rests on
• Recognize a framing effect by first checking whether the information itself actually differed
• Separate functional fixedness from mental set — being stuck on an object's purpose against being stuck on a method
• State why a reliable test need not be valid, and why an unreliable test cannot be valid

Built against the AP Psychology Course and Exam Description (College Board, revised framework first examined in May 2025): five units, each weighted between 15 and 25 percent of the exam, with Unit 2 covering cognition — memory, thinking, problem solving and testing. The exam runs 2 hours 40 minutes in two sections: 75 multiple-choice questions in 1 hour 30 minutes for 67 percent of the score, then two free-response questions in 1 hour 10 minutes for the remaining 33 percent, an Article Analysis Question and an Evidence-Based Question. No items, norms or scoring material from any published intelligence test are reproduced here, nor any diagnostic criteria, nor anything from any College Board publication, released exam or scoring guideline. Every scenario is invented and labeled invented in the question itself; real published research is named only for what it genuinely did and found. Zestly is an independent study tool. It is not affiliated with the College Board, which owns the AP Psychology exam, and it is not an test center.