Band 4.0 IELTS Writing Task 1 Model Answer

Overall Band Score: 4.0 · IELTS Momentum Workout · 2026-08-22

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 4.0)

The diagram 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 .

Overall, the highest main process computer precision control of motors and the lowest process make a base usually stationary movable this make a better work of motor .

To begin with , a mechanical arm works and the joints that make up the arm function in the same way as in a human arm and main make up stand of base usually stationary this best items

Furthermore, the computer is the timeless arm works this best mechanical wist allows gripper or alternative end effector to flex rotate and first motor make up especially elbow allows movement gives flexibility and second motor make good but third motor make up gripper built in sensors control force . Also main make up only human this is alternative end effectors spray print drill holes weld metal

AI examiner evaluation

Task Achievement / Task Response — Band 4.0

The response attempts to describe the mechanical arm, but it fails to clearly explain the process or the comparison between the mechanical and human arm. The information provided is fragmented and lacks a logical summary of the main features. Key components of the diagram, such as the specific functions of the motors or the analogy to human joints, are mentioned but not described in a way that conveys a clear understanding of the mechanism. The response lacks a coherent overview and fails to report the main features effectively, resulting in a response that is largely unclear to the reader.

Coherence and Cohesion — Band 4.0

The essay is divided into paragraphs, but the internal structure of these paragraphs is weak. There is no clear logical progression of ideas. While some cohesive devices like 'To begin with' and 'Furthermore' are used, they are applied mechanically and do not effectively link the ideas together. The referencing is often unclear, making it difficult for the reader to follow the description of the mechanical arm. The overall arrangement of information is disjointed, which significantly hinders the flow of the response.

Lexical Resource — Band 4.0

The vocabulary is very limited and repetitive. The student relies on basic words like 'make up', 'works', and 'best', which are insufficient for a technical description. There are frequent errors in word choice and collocation, such as 'timeless arm works' and 'make good', which make the text difficult to interpret. The student struggles to use precise terminology related to the diagram, such as 'actuators', 'articulation', or 'precision', which would be expected for this task. The limited range of vocabulary prevents the clear communication of the technical process.

Grammatical Range and Accuracy — Band 4.0

The response contains frequent grammatical errors that impede communication. There is a lack of control over sentence structure, with many sentences being fragmented or run-on. Basic errors in subject-verb agreement, article usage, and word order are pervasive throughout the text. For example, 'the highest main process computer precision control of motors' is syntactically incoherent. There is no evidence of complex sentence structures, and the frequent errors in basic grammar make the text very difficult to follow. The lack of punctuation also contributes to the overall lack of clarity.

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

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