Band 4.5 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.5 · IELTS Momentum Workout · 2026-09-22

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 4.5)

The provided diagram illustrates the structure and machanism about the machanical arms functions way is very similar to human arm.

Overall, it is evident that , the process is start at the machanical arm is fixed to a base at shoulder and end at wrist allows the gripper to rotate.

It clearly seen that the, firstly the machanical arms is fixed to a base of the shoulder. The base is usually stationary and occassionally movable.The pivot between the simmilar and base enabls arm to rotate. The shoulder is working same like human shoulders, raising and lowers arms.

The elbow middle of the arms allows further movement and gives flexibility. after that, the wrist aloows the arm to grip or alternative end effector allow to rotate arm . Finally, The gripper built in sensor control force in hand or arm.

AI examiner evaluation

Task Achievement / Task Response — Band 4.5

The student attempts to describe the mechanical arm diagram, covering several main features such as the base, shoulder, pivot, elbow, wrist, and gripper. However, the response falls significantly short of the 150-word minimum, containing only 139 words, which results in a penalty under Task Achievement. Additionally, the overview is extremely brief and poorly formulated ('Overall, it is evident that , the process is start at...'), and the reporting of features lacks clarity and precision regarding how the computer and motors coordinate with the joints.

Coherence and Cohesion — Band 5.0

The essay attempts paragraphing, dividing the introduction, overview, and body details into separate blocks. However, the logical progression is hindered by poor cohesive devices and numerous mechanical errors in punctuation and conjunctions, such as 'Overall, it is evident that , the process is start at...' and 'It clearly seen that the, firstly...'. Referencing is frequently unclear, and the overall structure feels disjointed due to broken sentence boundaries.

Lexical Resource — Band 4.5

The vocabulary range is very limited and heavily repetitive, featuring multiple spelling errors (e.g., 'machanism' and 'machanical' instead of mechanism and mechanical). Words like 'simmilar' and 'aloows' further demonstrate poor control over basic spelling and word choice. While the student attempts to use some task-specific terms from the diagram ('base', 'pivot', 'shoulder', 'gripper'), the high frequency of lexical and spelling errors noticeably strains the reader.

Grammatical Range and Accuracy — Band 4.0

The text contains a very limited range of grammatical structures, relying mostly on simple sentences with frequent, severe errors. There are numerous basic grammatical failures, such as missing auxiliary verbs and incorrect verb forms (e.g., 'the process is start at', 'raising and lowers arms', 'the wrist aloows the arm to grip or alternative end effector allow to rotate arm'). Punctuation is also misused throughout, and error-free sentences are extremely rare, causing constant difficulty for the reader.

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

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