Subject guide
IB Sports, Exercise & Health Science Internal Assessment guide
The IB Sports, Exercise & Health Science Scientific Investigation (IA) is graded against 4 criteria worth 24 marks total. This guide explains exactly what each criterion expects and what examiners look for at each mark level.
Assessment criteria
Examiners score each criterion independently using the mark band descriptors below.
| Criterion | Name | Marks |
|---|---|---|
| Research Design | Research Design | 6 |
| Data Analysis | Data Analysis | 6 |
| Conclusion | Conclusion | 6 |
| Evaluation | Evaluation | 6 |
| Total | 24 | |
Criterion-by-criterion breakdown
Research Design
Research Design
What this criterion assesses
The methodology (purpose and practice) used to address the research question effectively communicated: a focused question in a specific sport/exercise/health context, the relevant variables (or groups being compared), methodological choices explained, and enough detail to reproduce the investigation.
Mark band descriptors
Criterion: Research design (0–6) — the extent to which the report effectively communicates the methodology (purpose and practice) used to address the research question: - 0: The report does not reach a standard described below. - 1–2: The research question is stated without context; methodological considerations are stated but not developed; the description of the method lacks the detail needed to reproduce the investigation. - 3–4: The research question is outlined within a broad sport, exercise or health context; methodological considerations (variables or comparison groups, protocol, participant considerations) are described; the method could be reproduced with few ambiguities. - 5–6: The research question is described within a specific and appropriate context; methodological considerations associated with collecting relevant and sufficient data are explained; the description of the method allows the investigation to be reproduced. [Adapted from the sciences scientific-investigation model per the 2026 SEHS guide structure; not verbatim band wording.]
Common mistakes
Research question without a specific sport, exercise or health contextComparison groups or variables not operationally definedMethod missing the detail needed to reproduce the protocolEthical/safety considerations for human participants ignored
Data Analysis
Data Analysis
What this criterion assesses
Data recorded, processed and presented in ways relevant to the research question: clear and precise communication (tables, graphs, units, significant figures), appropriate consideration of uncertainties and variability, and processing carried out appropriately and accurately.
Mark band descriptors
Criterion: Data analysis (0–6) — the extent to which the data is recorded, processed and presented in ways relevant to the research question: - 0: The report does not reach a standard described below. - 1–2: The recording and processing of data is communicated but is neither clear nor precise, with limited consideration of uncertainties; processing contains major omissions, inaccuracies or inconsistencies. - 3–4: The communication of the recording and processing of data is either clear or precise; uncertainties and variability are considered with some significant omissions; processing relevant to the research question is carried out with some significant errors. - 5–6: The communication of the recording and processing of the data is both clear and precise; uncertainties and participant variability are appropriately considered; the processing relevant to the research question is carried out appropriately and accurately. [Adapted from the sciences scientific-investigation model per the 2026 SEHS guide structure; not verbatim band wording.]
Common mistakes
Tables or graphs missing units, labels or consistent precisionHuman variability and measurement uncertainty ignoredProcessing errors that propagate into the findingsProcessed results that don't address the research question
Conclusion
Conclusion
What this criterion assesses
The research question answered with regard to the analysis and the accepted scientific context — a justified conclusion consistent with the data and its limitations, compared against published research or accepted theory, and considering the implications of the findings for real-world sport, exercise or health practice.
Mark band descriptors
Criterion: Conclusion (0–6) — the extent to which the research question is answered with regard to the analysis and the accepted scientific context: - 0: The report does not reach a standard described below. - 1–2: A conclusion is stated that is relevant to the research question but is not supported by the analysis; comparison to the accepted scientific context is superficial; implications of the findings are not considered. - 3–4: A conclusion is described that is relevant to the research question but not fully consistent with the analysis; some relevant comparison to the accepted scientific context is made; implications of the findings for real-world examples are stated. - 5–6: A conclusion is justified that is relevant to the research question and fully consistent with the analysis; it is justified through relevant comparison to the accepted scientific context (published research, theory); and the implications of the findings on real-world examples (e.g. whether a measured difference is meaningful for actual performance or health) are discussed. [Adapted from the sciences scientific-investigation model per the 2026 SEHS guide structure, including the SEHS-specific real-world implications descriptor; not verbatim band wording.]
Common mistakes
Conclusion claims more than the data and its variability supportNo comparison with published values or accepted theoryStatistical significance confused with practical significance for performanceReal-world implications of the findings never considered
Evaluation
Evaluation
What this criterion assesses
Evidence of evaluation of the investigation methodology with suggested improvements: specific weaknesses and limitations (protocol, participant variability, measurement) weighed for their relative impact on the conclusion, with realistic improvements that address them.
Mark band descriptors
Criterion: Evaluation (0–6) — the extent to which the report provides evidence of evaluation of the investigation methodology and suggested improvements: - 0: The report does not reach a standard described below. - 1–2: Generic methodological weaknesses or limitations are stated; realistic improvements are stated. - 3–4: Specific methodological weaknesses or limitations are described; realistic improvements that are relevant to the identified weaknesses are described. - 5–6: The relative impact of specific methodological weaknesses or limitations on the conclusion is explained; realistic improvements relevant to the identified weaknesses are explained. [Adapted from the sciences scientific-investigation model per the 2026 SEHS guide structure; not verbatim band wording.]
Common mistakes
Generic weaknesses ("human error") not specific to this protocolImprovements unrelated to the weaknesses identifiedRelative impact of each limitation on the conclusion not weighedParticipant-related limitations (motivation, learning effects) ignored
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