IB Extended Essay Subject-Specific Guidance

Choosing your Extended Essay subject is one of the most consequential academic decisions you will make in the IB Diploma Programme. It determines the next year of your research, shaping the questions you ask, the methods you use, and the skills you hone. This guide demystifies the subject-specific expectations for popular EE choices, empowering you to align your personal interests with the academic rigor required for a successful outcome.

From Interest to Viable Question: The Subject Selection Foundation

Your first step is moving beyond a general interest to a viable research question within a specific IB subject. The Extended Essay (EE) is a 4,000-word independent research project, and its success hinges on a question that is sharply focused, researchable, and appropriate to the subject's disciplinary framework. A vague interest in "climate change" could lead to an EE in Biology, Chemistry, Geography, or Economics, but each would demand a completely different approach. Therefore, selecting your subject is not about picking a favorite class; it's about choosing the methodological toolkit you want to work with for a deep, sustained investigation. Consider which subject’s way of thinking—analytical, experimental, interpretive, or quantitative—best fits your intellectual style and the topic you wish to explore.

Decoding Subject-Specific Methodologies and Expectations

Each subject area has a distinct "language" of research. Understanding these nuances before you commit is crucial for meeting the EE assessment criteria, particularly Criterion B (Knowledge and Understanding) and Criterion C (Critical Thinking).

English A: Literature & Language & Literature The core of an English EE is textual analysis. Your essay must be a sustained, argument-driven analysis of one or more literary works, or a detailed exploration of language in a specific context. The focus is on your interpretative skills, not on summarizing the plot or an author's biography. A strong English EE uses literary or linguistic theory as a lens—such as feminist critique, post-colonial theory, or stylistics—to generate an original insight. Your primary sources are the texts themselves; secondary sources are used to support or contextualize your argument, not to replace it.

History A History EE is an exercise in constructing a historical argument based on evidence. Your research question must be framed to allow for analysis and debate, not just description. The methodology revolves around the critical evaluation of primary and secondary sources. You must engage with historiography—how different historians have interpreted your topic—and position your own argument within that scholarly conversation. A common pitfall is presenting a narrative account ("What happened?") instead of an analytical one ("Why did it happen, and what is the significance?").

Sciences (Biology, Chemistry, Physics) A Science EE is fundamentally an investigation, not a report. It requires a clear, focused research question that can be explored through a hands-on, controlled experiment. While secondary research is needed for your introduction, the heart of the essay is your own collected data. Methodology is paramount: you must detail your experimental design, justify your variables and controls, and rigorously process your data. The analysis must include appropriate statistical tests to determine the significance of your results. A science EE that is purely literature-based or relies on simulations without primary data collection is unlikely to score highly.

Economics An Economics EE applies economic theory to a real-world issue. Your question should be narrowly defined—analyzing the impact of a specific policy on a particular market, for example. The methodology involves gathering quantitative data (e.g., from government statistics, company reports) and using economic models and theories (like supply-demand, elasticity, or market failure) to analyze it. The essay must demonstrate your ability to think like an economist: constructing diagrams correctly, interpreting data trends, and evaluating the limitations of your theoretical models when applied to complex reality.

Psychology A Psychology EE must be rooted in the scientific method, similar to a science EE, but focused on human behavior. You can take an experimental, observational, or correlational approach. Crucially, your research question must be informed by established psychological theory (e.g., cognitive, social, or biological theories). Ethical considerations are a major component; you must thoroughly justify your methodology from an ethical standpoint, especially if working with human participants. The analysis involves using descriptive and inferential statistics to interpret your findings in the context of the underlying theory.

Aligning Passion with Academic Rigor

The most successful EEs emerge from a sweet spot where personal interest, academic challenge, and resource feasibility intersect. Start by asking yourself three questions: First, "Am I genuinely curious about this, enough to spend 40+ hours researching it?" Second, "Does my school have a supervisor with expertise in this subject to guide me?" And third, "Are the primary sources or data I need accessible and manageable within the EE's scope and timeframe?" A passionate interest in neurobiology is moot if your school lacks the lab equipment for EEG experiments. In such a case, pivoting to a literature-based Psychology EE on the same topic might be a more viable path to rigor. This alignment ensures your motivation sustains you through the inevitable challenges of the research process.

Common Pitfalls and How to Avoid Them

1. Mismatched Methodology: Choosing a question better suited for a different subject. For instance, asking "What was the social impact of the Chernobyl disaster?" is a History or Social & Cultural Anthropology question, not a Physics one. A Physics EE on Chernobyl would need to focus on the reactor physics, fallout analysis, or environmental measurement techniques.

• Correction: Before finalizing your question, explicitly outline the primary research method you will use. Ensure it aligns perfectly with the standard practices of your chosen subject.

1. The "All-Encompassing" Question: Attempting to tackle a topic that is too broad, like "An analysis of Shakespeare's plays" or "The causes of World War II." This leads to superficial treatment and a descriptive essay.

• Correction: Use limiting factors. Narrow by time, place, text, variable, or demographic. For example, "To what extent does Shakespeare use botanical imagery to convey themes of political instability in Richard II?" or "How significant was the failure of the Schlieffen Plan as a cause of German defeat in the First World War?"

1. Neglecting the "Why" and "How": Especially in Humanities and Sciences, students often report what they found or what happened without deeper analysis.

• Correction: Constantly interrogate your evidence. In a science EE, don't just state the correlation; use theory to explain it. In a history EE, don't just list causes; weigh their relative significance and engage with conflicting historical interpretations.

1. Poor Source Integration: Treating secondary sources as a list of quotes to be inserted, rather than as voices in a debate to be engaged with critically.

• Correction: When you read a scholar's argument, summarize it in your own words, evaluate its strengths and weaknesses, and explicitly state how it supports, challenges, or nuances your own thesis.

Summary

• Your subject choice dictates your research methodology. Decide based on whether you want to analyze texts, evaluate historical sources, conduct experiments, or apply economic models.
• Subject-specific expectations are non-negotiable. A science EE requires primary data from an experiment; a history EE requires engagement with historiography; an English EE requires sustained textual analysis.
• A narrow, sharply focused research question is the single most important factor for success. It provides the necessary boundaries for in-depth, analytical treatment within the 4,000-word limit.
• Passion must be tempered by practicality. Ensure you have access to the necessary guidance (a supervisor), resources (lab equipment, primary sources), and data to execute a rigorous investigation.
• The EE is an exercise in critical thinking, not reporting. Across all subjects, you are assessed on your ability to construct, sustain, and evaluate an argument based on evidence.