Band 5.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 5.5 · IELTS Momentum Workout · 2026-08-30

IELTS Writing Task 1 question

The diagram below shows how a mechanical arm works, and how the joints that make up the arm function in the same way as those in a human arm. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

Student answer (Band 5.5)

The diagram show the structural construct of a mechanical arm which surprisingly mimics the anatomy and functionality of human arm. It has a stationary base that is occasionally moveable just like clavicular acromion portion of human shoulder providing main stabilizing component along with posterior scapula and muscular rotator-cuff in front. Stability is one of the most important factor for the affective movement of rest of the system. After the base comes pivot and shoulder which is significantly similar to the glenohumeral joint of humans . This pivot joints allow to and frow movement of arm , help elevate and lowers the arm just like shoulder of mechanical arm . Pivot further allows some degree of rotation to help make the movements more affective and not too robotic. The second hinge joint that come in midway is the elbow. it provides flexibility and ease of movement, then is arm looking shaft that ends in gripper that structurally and functionally feels similar to the wrist joint . This wrist of mechanical arm allows for variety of end effectors as an alternative to gripper such as spray paints, drill holes ,weld metals and allows flexion and rotation similar to the movements provided by human wrist. The only difference is that these mechanical arm work joints are powered by motors while human arm has an intricate and interesting network of nerves and muscles that makes movement possible.

AI examiner evaluation

Task Achievement / Task Response — Band 5.5

The response covers the main features of the mechanical arm and makes relevant comparisons to the human arm. However, the analysis is somewhat descriptive rather than analytical. The student focuses heavily on anatomical terminology (e.g., 'clavicular acromion', 'glenohumeral joint') which is not explicitly provided in the diagram, potentially straying into external knowledge rather than focusing on the visual information. While the comparison is clear, the report lacks a cohesive overview or summary paragraph that synthesizes the main function of the mechanical arm as a whole. The response is accurate in its reporting of the components, but it could be improved by focusing more on the structural relationships depicted in the diagram rather than detailed anatomical comparisons.

Coherence and Cohesion — Band 5.5

The response is organized into a single paragraph, which hinders the logical progression of the report. IELTS Task 1 responses should be structured with clear paragraphing, typically separating the introduction, main features, and comparisons. While there are some cohesive devices used, such as 'After the base comes', 'The second hinge joint', and 'The only difference is', the lack of paragraph breaks makes the text feel dense and less professional. The flow of ideas is generally logical, but the absence of a clear structure limits the ability to guide the reader through the comparison effectively.

Lexical Resource — Band 5.5

The student demonstrates a good range of vocabulary, including terms like 'stationary', 'stabilizing', 'intricate', and 'functionality'. However, there are several instances of word-choice errors and awkward collocations. For example, 'affective movement' is used instead of 'effective movement', and 'arm looking shaft' is an unnatural description. Additionally, 'drill holes' is used as a noun phrase for an end effector, which is slightly imprecise. While the vocabulary is sufficient to convey the meaning, the errors in collocation and the misuse of 'affective' prevent the response from reaching a higher band score.

Grammatical Range and Accuracy — Band 5.5

The response contains a mix of simple and complex sentence structures. There are several grammatical errors throughout the text, such as 'The diagram show' (subject-verb agreement), 'one of the most important factor' (pluralization error), and 'these mechanical arm work joints' (awkward phrasing). Punctuation is also inconsistent, with missing spaces after periods and commas. While the meaning is generally clear, the frequency of these errors, particularly with subject-verb agreement and pluralization, indicates a lack of control over complex structures, keeping the score in the mid-range.

See this exact question answered at other band scores — the same prompt compared across bands.

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