Historical Thinking and Research Skills
What the questions test
This domain tests how historians work, not what they know. Items present a source, an interpretation, or a research scenario and ask you to reason about evidence, perspective, or method. The vocabulary is the content: sourcing, close reading, contextualization, corroboration, periodization, causation, continuity and change, and historiography.
Core concepts:
- Primary vs. secondary sources - defined by origin and proximity to the event, not by reliability.
- Sourcing - who made it, when, for whom, and why; purpose and audience shape content.
- Contextualization - situate a document in its political, social, and economic moment.
- Corroboration - compare independent sources; agreement across independent witnesses raises confidence.
- Historiography - how interpretations shift with new evidence, new questions, and new scholars.
- Synthesis and argument - a thesis must be defensible, specific, and supported by cited evidence.
Traps to expect
- Reliability fallacy - assuming a primary source is accurate or a secondary source unbiased. Purpose, not category, drives reliability.
- Presentism - judging past actors by contemporary norms.
- Confusing correlation with causation - chronology alone proves nothing.
- Single-source overreach - one diary cannot establish a general trend.
- Hindsight bias - reading outcomes as inevitable.
Rule of thumb
Apply the Five C's to any source item: creator, context, claim, corroboration, and consequence. If an answer option cannot be tied to one of the C's, it is usually a distractor.
Worked example: "A planter's 1850 letter praises the loyalty of enslaved workers. What is the best use of this source?" Not as evidence of contentment - as evidence of the planter's self-justifying ideology and the surveillance system he describes. Ask what the document can bear witness to, not what it asserts.