Placeholder Domain 3 - Stem Analysis and Distractor Patterns
What this section covers
Stem analysis is the skill of separating givens from the ask. A candidate must understand qualifiers ('best,' 'first,' 'most likely,' 'except,' 'least'), scope words ('always,' 'only,' 'primarily'), and the difference between a fact pattern and a distractor detail. Distractor patterns are predictable: true statements that do not answer the question, reversed cause and effect, absolute language that overstates a rule, and answer choices that solve a neighboring problem.
Traps that appear in questions
The classic trap is answering from memory of a similar question instead of the stem in front of you. Another is letting an early answer choice anchor your reasoning. A third is ignoring a negative qualifier such as 'except' and selecting the first true statement. Also watch for 'all of the above' constructions that hide one false option, and for two choices that differ only by a scope word.
Worked example
Take a stem and rewrite it in two lines. Line one, givens: list only the facts that constrain the answer. Line two, ask: restate the question in your own words, preserving qualifiers. For example, 'A system meets A and B but not C; which requirement is unmet?' becomes givens: A yes, B yes, C no; ask: which requirement fails? Then predict an answer before reading the choices.
Rule of thumb
Answer the question before you look at the options. If your prediction is not among the choices, re-read the qualifier rather than forcing a match.