Historical Concepts and Skills
This domain tests how historians think rather than what happened: chronology and periodization, sourcing, contextualization, corroboration, causation, continuity and change, and the construction of evidence-based argument. Expect document-based items that give short quotations or data tables rather than pictures.
Sourcing and evidence
- Primary sources are produced inside the period under study - statutes, letters, ledgers, photographs, oral testimony, artifacts. Secondary sources are later interpretations: monographs, textbooks, documentaries.
- Interrogate every source for author, date, audience, purpose, and silence: what does it fail to record, and whose voice is missing?
- A biased source is still evidence. A 1911 employer's statement defending child labor documents the employer's interest, not the absence of child labor; corroborate it against factory-inspection reports and census returns.
Causation and chronology
- Separate long-term structures (drought, demographic pressure, the plantation economy), medium-term pressures (policy, party realignment), and triggers (the 1914 assassination at Sarajevo).
- Periodization is an interpretive act. 476 CE and 1453 CE conventionally mark the Western Roman and Byzantine endpoints, but "medieval" and "early modern" are historians' conveniences, not walls.
Worked example
Two 1863 sources describe the New York City draft riots: a Republican newspaper editorial and a private letter from an Irish immigrant laborer. Which best explains their disagreement? Both are primary, so "one is a primary and one a secondary source" is wrong. The editorial speaks to a mass political readership and argues a position; the letter is private, addressed to kin, and voices a neighborhood's grievance about the $300 commutation fee. The best answer names purpose and audience; options claiming the newspaper is objective because it is printed invert the reasoning.
Traps
- Reading "primary" as "accurate."
- Confusing correlation with causation in a stimulus statistic.
- Choosing a true statement that does not answer the stem.
- Presentism: condemning past actors when the stem asks for explanation, not judgment.