To what extent does the A* algorithm demonstrates greater time efficiency than Dijkstra’s algorithm in grid-based pathfinding environments with varying obstacle densities, implemented in Python?SL
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A
Official IB Result
IB Grade: A
Criteria A: Focus and Method
5/6
0
3
6
Criteria Strands
A.1Topic Communication
Excellent
A.2Research Question
Good
A.3Methodology
Moderate
Criteria Feedback
- You communicate a clear comparison between two algorithms in a specific grid-based setting.
- Your research question is focused on time efficiency and is clearly tied to the experiment you ran.
- You show a genuine attempt at controlled testing with fixed endpoints, obstacle densities, and repeated trials.
- The wording of the research question is not fully precise, especially in how “to what extent” is measured.
- The methodology would be stronger with a clearer explanation of trial control, handling of variance, and treatment of anomalous cases.
- Some reported data and graphs do not align cleanly, which weakens the reliability of the experimental setup.
Criteria B: Knowledge and Understanding
4/6
0
3
6
Criteria Strands
B.1Subject Knowledge
Moderate
B.2Use of Terminology
Moderate
Criteria Feedback
- You use a solid range of relevant computer science terminology, including heuristic, priority queue, admissibility, and node expansion.
- You show understanding of the core distinction between A* and Dijkstra’s algorithm.
- You connect theory to the investigation by explaining why heuristic-guided search matters in pathfinding.
- Some technical terms are used imprecisely, especially where pruning, admissibility, and consistency are discussed.
- Several mathematical expressions and symbols are not written clearly enough to fully support the explanation.
- A few algorithm names and units are inconsistent, which reduces the precision of the subject knowledge on display.
Criteria C: Critical Thinking
10/12
0
6
12
Criteria Strands
C.1Research Application
Poor
C.2Analysis
Poor
C.3Discussion and Evaluation
Poor
Criteria Feedback
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- Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
Criteria D: Presentation
4/4
0
2
4
Criteria Strands
D.1Structure
Moderate
D.2Layout
Moderate
Criteria Feedback
- Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
- Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
- Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
- Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.