Edexcel IGCSE History: Paper 2 Investigation and Breadth Studies (4HI1)

This guide covers Paper 2 – Investigation and Breadth Studies, for Pearson Edexcel International GCSE History (4HI1), specification Issue 5. Paper 2 pairs one Historical Investigation, chosen from five options, with one Breadth Study in change, chosen from eight options – a different structure from Paper 1’s two Depth Studies, and testing a different historical skill.

Where this fits in 4HI1

Where Paper 1’s Depth Studies examine a narrow period in close focus, Paper 2 asks for two different skills. The Historical Investigation tests source evaluation and enquiry within a defined topic; the Breadth Study tests understanding of change and continuity across a long timespan, sometimes a century or more. As with Paper 1, the specific Investigation and Breadth Study a candidate needs to know depend entirely on which options their centre has chosen to teach.

Syllabus coverage

PEARSON EDEXCEL INTERNATIONAL GCSE HISTORY (4HI1) — PAPER 2 INVESTIGATION AND BREADTH STUDIES

Historical Investigations (choose 1 of 5):

• A1: The Origins and Course of the First World War, 1905–18
• A2: Russia and the Soviet Union, 1905–24
• A3: The USA, 1918–41
• A4: The Vietnam Conflict, 1945–75
• A5: East Germany, 1958–90

Breadth Studies in change (choose 1 of 8):

• B1: America — From New Nation to Divided Union, 1783–1877
• B2: Changes in Medicine, c1848–c1948
• B3: Japan in Transformation, 1853–1945
• B4: China — Conflict, Crisis and Change, 1900–89
• B5: The League and the UN, 1919–c2011
• B6: The Changing Nature of Warfare and International Conflict, 1919–2011
• B7: The Middle East — Conflict, Crisis and Change, 1917–2012
• B8: Diversity, Rights and Equality in Britain, 1914–2010

How to approach it

Confirm which Investigation and which Breadth Study a centre has chosen before revising anything else – as with Paper 1, this is the single most consequential piece of information a candidate needs, and getting it wrong wastes revision time on the wrong content entirely. The Historical Investigation is assessed partly through unseen sources in the exam itself, so preparation should focus on the background narrative and context needed to interpret unfamiliar sources confidently, rather than trying to memorise every possible source in advance. The Breadth Study, by contrast, rewards being able to trace change over the whole period – building a timeline that identifies turning points and periods of continuity is usually more useful than a list of isolated events, since exam questions frequently ask candidates to assess how much, or how quickly, something changed.

Common mistakes

Treating the Historical Investigation like a second Depth Study and over-memorising narrative detail while under-preparing the skill of reading and evaluating unfamiliar sources, which the paper specifically tests. Writing about a Breadth Study as a sequence of disconnected events rather than explicitly addressing change, continuity, and the pace of change, which is what the assessment objectives for this component reward. Confusing which centre-chosen options apply – because Paper 2 offers thirteen total options across two independent choices, candidates sometimes revise material relevant to a different centre’s selection found in shared revision materials.

Worked example

A Historical Investigation question presents two unfamiliar sources about the same event and asks how far one source supports the evidence of the other – a cross-referencing question, not a usefulness question. What separates a strong answer from a weak one?

WEAK: describes what each source says in turn, then states "Source A
      is more useful because it gives more detail."

STRONG: identifies specific points where the two sources agree and
        specific points where they disagree, explaining each point
        with reference to the sources' content -- and, where it
        helps the argument, their origin and purpose -- before
        reaching a supported judgement on how far the one source
        supports the other overall.

The background narrative knowledge built while studying the Investigation exists to support exactly this kind of cross-referencing – it is not tested for its own sake the way Depth Study content is on Paper 1.

Quick revision checklist

• Confirm the specific Historical Investigation and Breadth Study your centre has taught before revising further.
• For the Investigation, build contextual background knowledge that helps interpret unfamiliar sources, rather than memorising a fixed narrative.
• Practise evaluating a source’s origin, purpose and content, not just summarising what it says.
• For the Breadth Study, construct a timeline highlighting turning points and periods of continuity across the full period studied.
• Practise answering “how far” and “how much” change questions, which this component’s assessment objectives specifically reward.
• Do not rely on shared revision notes without checking they match your centre’s chosen options – Paper 2 offers thirteen total choices across two independent selections.

Assessment objectives

Across the qualification, Pearson Edexcel weights four objectives, not three: AO1 (knowledge and understanding of key features and characteristics of the periods studied) at 34%, AO2 (explaining, analysing and making judgements about historical events using second-order concepts such as cause, consequence, change and significance) at 36%, AO3 (using source material to comprehend, interpret and cross-refer sources) at 15%, and AO4 (analysing and evaluating historical interpretations) at 15%. AO3 and AO4 are not the same strand – they’re marked on different questions, and AO4 is assessed across three separate questions spanning both papers, not folded into “source-based skills” generally. On Paper 2 specifically, the Historical Investigation carries the bulk of AO3 (15%), while AO4 carries a smaller 5% here (the majority of AO4’s marks sit on Paper 1’s Depth Studies instead). Because AO1 and AO2 together make up the majority of the marks across both papers, secure factual knowledge remains the foundation even on a source-based component like the Investigation: strong source evaluation still depends on being able to bring accurate contextual knowledge to bear on what a source says and omits.

Related resources

• Paper 2 revision notes
• Paper 2 practice questions

Official syllabus

Pearson Edexcel International GCSE History (4HI1) specification, Issue 5, February 2026 — qualifications.pearson.com.