Connectors and Cohesion in OET Writing: Linking Ideas Without Overloading

How to use connectors and cohesion devices in OET letters to improve Organisation and Language marks — without the over-linking that pushes letters into informal register.

By Dr Mariam's team 3 min read
Connectors and Cohesion in OET Writing: Linking Ideas Without Overloading

Connectors are the most visible cohesion device in an OET letter — and the most misused. Candidates who have practised essay writing often over-connect: stacking “Furthermore”, “Moreover”, and “Additionally” in a single paragraph in an attempt to show range. This reads as essayistic rather than clinical-professional, and it costs marks under both Organisation and Language. This guide covers how connectors are assessed, which ones work in an OET letter, and how to build cohesion without over-signposting.

For the criterion that assesses cohesion most directly, see OET writing criteria.

How connectors are assessed across the six criteria

Connector issueCriterion affectedImpact
Missing connectors — ideas are abrupt and unlinkedOrganisation & LayoutDrops Organisation band — reader has to infer the logical connection
Stacked connectors — three in one paragraphGenre & StyleDrops Genre band — reads as essay, not professional letter
Wrong connector — ‘however’ where ‘therefore’ is meantLanguageDrops Language band — incorrect word choice
Informal connector — ‘Also’, ‘Plus’, ‘So’ at sentence startGenre & StyleDrops Genre band — register mismatch for formal correspondence
Good paragraph sequencing with minimal connectorsOrganisation & LayoutRaises Organisation band — coherence without visible scaffolding

The approved connector set for OET letters

These work in professional clinical correspondence without pushing the register into essay territory:

Additive (adding a point): In addition, / Furthermore (once per letter max)
Contrast: However, / Despite [noun phrase], / Although [clause],
Causal: Therefore, / As a result, / Consequently,
Temporal: Subsequently, / Following this, / Prior to [noun phrase],
Concession: Despite [noun phrase], / While [clause],

Avoid: Moreover, Additionally, Likewise, In contrast, To summarise, Last but not least, Firstly / Secondly / Thirdly, As mentioned above, In conclusion.

The better cohesion strategy: structure over signposting

The highest-scoring OET letters rarely feel connector-heavy. They achieve cohesion through three techniques that don’t require explicit connectors:

1. Paragraph topic sentences. Each paragraph opens with a clear topic sentence that tells the reader what this paragraph contains. The connection between paragraphs is implied by the logical sequence: reason for referral → relevant history → current status → what you need from the recipient.

2. Pronoun reference. After introducing Mr Hassan in the opening paragraph, subsequent sentences use “He” and “His” without re-stating the name. This forward-linking is cohesion — invisible and appropriate to the clinical register.

3. Lexical chains. Repeating key clinical terms across the letter (“blood pressure”, “antihypertensive medication”, “cardiovascular risk”) creates a semantic thread that holds the letter together without connectors.

Before/after: the stacked connector problem

Over-connected (essays register):
Mr Al-Saif was admitted with chest pain. Furthermore, he has a significant cardiac history. Moreover, he is currently on warfarin. Additionally, his renal function has recently declined.

Correct (professional clinical register):
Mr Al-Saif was admitted with chest pain. He has a background of ischaemic heart disease and is currently anticoagulated with warfarin. Renal function has declined over the past three months, which is relevant to his anticoagulation management.

The second version has no connectors in the traditional sense — the logic is carried by paragraph structure and clinical sequencing. This is what a Band B OET letter looks like.

Practical check during proofreading

During your proofreading pass, count the number of sentence-opening connectors. If you have more than three in a letter, replace at least one with a restructured sentence that makes the connection implicit.

For a full Organisation and cohesion analysis of your letter, use the free Writing Checker or submit for professional correction with written criterion-by-criterion feedback.

Frequently asked questions

Common questions on this topic — full answers below.

What are connectors in OET writing?
Connectors (also called cohesive devices or discourse markers) are words and phrases that link ideas across sentences and paragraphs. In OET letters they include additive connectors ('In addition', 'Furthermore'), contrast connectors ('However', 'Despite'), causal connectors ('Therefore', 'As a result'), and temporal connectors ('Subsequently', 'Following this'). Used correctly they improve Organisation marks; overused or misused they drop Language and Genre marks.
Which connectors are appropriate for OET letter writing?
Appropriate connectors for OET professional correspondence: 'In addition' (adding information), 'However' (contrasting), 'Therefore' / 'As a result' (causal), 'Subsequently' / 'Following this' (temporal sequence), 'Despite' / 'Although' (concession). Inappropriate — too informal or too essayistic: 'Also' at sentence start, 'Firstly / Secondly / Thirdly', 'Last but not least', 'To conclude', 'As mentioned above'.
How many connectors should an OET letter have?
There is no target number, but a 180–220 word letter that has more than four or five explicit connectors typically reads as over-linked. The OET register is professional correspondence, not an essay. The best letters use paragraph structure, topic sentences, and pronoun reference to create cohesion — connectors fill the gaps where sequencing alone is insufficient.
Does cohesion affect Organisation or Language in OET marking?
Both. Cohesion devices are assessed primarily under Organisation & Layout — the criterion that evaluates how logically information flows. But connector choice (word-level accuracy and register) also contributes to Language. A letter that uses 'Nevertheless' where 'However' fits, or 'Likewise' in a clinical context, loses marks under Language for inappropriate vocabulary choice.
What is the difference between cohesion and coherence in OET writing?
Cohesion refers to the surface-level linking devices — connectors, pronoun reference, lexical repetition. Coherence refers to the logical flow of ideas — whether information is sequenced in a way that makes sense to the reader without them having to work it out. OET examiners assess both. A letter can have good cohesion (many connectors) but poor coherence (illogically sequenced paragraphs). Coherence is harder to fix and has a bigger impact on the Organisation band.
Are connectors like 'Furthermore' and 'Moreover' appropriate in OET letters?
'Furthermore' is appropriate occasionally — once per letter, to add a significant point. 'Moreover' is on the edge of essay register and is better avoided in OET letters. The problem is not either word in isolation but stacking them: a paragraph that opens 'In addition... Furthermore... Moreover...' reads as a B2 essay, not a professional clinical letter. Replace the stack with a single well-chosen connector or restructure as a short list.

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