Overall Score: 11/24
IB Grade: 4
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Criteria A: Research Design
3/6
0
3
6
Criteria Strands
Moderate
Research question context
Moderate
Methodological considerations
Good
Methodology description
Criteria Feedback
- Clear statement of the research question with some ecological background linking to Artemia biology.
- Methodological considerations (temperature, light, volumes, egg numbers) are identified and relevant to the research question.
- Procedure is described with quantitative detail (salt masses, solution volumes, daily counts) allowing reproduction with few ambiguities.
- Context is only broadly outlined—no discussion of time frame or biological significance of growth and swimming speed.
- Rationale for salinity increments and trial design is unexplained.
- Background literature conditions (optimal hatching at 28 °C) do not match experimental conditions (20–23 °C).
Criteria B: Data Analysis
2/6
0
3
6
Criteria Strands
Moderate
Communication of data recording and processing
Poor
Consideration of uncertainties
Poor
Data processing quality
Criteria Feedback
- Raw data tables and graphs are provided, and basic processing (survival rate, salt efficiency) is attempted.
- Processing steps are explained in prose, indicating an understanding of how to derive key metrics.
- Uncertainties are minimally addressed (only balance ±0.1 g) with no error bars or replicate variability recorded.
- Data processing omits key steps (averages across dishes, undefined units for efficiency metric, missing statistics).
- Graphical presentation lacks axis labels, units, and precision.
Criteria C: Conclusion
3/6
0
3
6
Criteria Strands
Moderate
Conclusion relevance and consistency
Poor
Scientific context comparison
Criteria Feedback
- Conclusion is relevant to the research question and broadly matches observed trends (moderate salinity optimum, extremes inhibit hatching).
- Comparison to scientific context (Vos 1979) demonstrates some engagement with literature.
- The optimal salinity is not numerically specified or justified by the data.
- Surprising results (hatching in fresh water) are noted but not contextualized within osmotic physiology or further literature.
- Inconsistencies between data and statements (growth at 0 g salt) are not reconciled.
Criteria D: Evaluation
3/6
0
3
6
Criteria Strands
Moderate
Methodological weaknesses
Moderate
Improvements
Criteria Feedback
- Identifies specific methodological weaknesses (scale precision, lighting, salt dissolution, egg viability).
- Proposes realistic improvements directly addressing identified limitations (increase trials, use precise scale).
- Impacts of weaknesses are described but not quantified or explained in terms of relative effect on results.
- Improvements lack detail on how they reduce uncertainty or enhance validity (e.g., statistical power, error reduction).