If you are preparing for the Cambridge DELTA, you have most likely encountered the terms cohesion and coherence. They are often used interchangeably in everyday staffroom chat, but for Delta-level analysis, keeping them distinct is essential—not only for passing Module 1 but also for writing precise background essays and giving focused feedback to learners.
So what is the difference? In short:
- Cohesion is the network of surface-level linguistic links that connect sentences and clauses (e.g., pronouns, conjunctions, lexical chains).
- Coherence is the underlying logical flow that makes the relationships of ideas evident and meaningful to a reader or listener.
A text can be beautifully cohesive yet completely incoherent. Conversely, a text can be coherent despite having few or no explicit cohesive devices.
Consider the following pairs of sentences:
- “My grandmother gave me a watch. It stopped working after a week.” This is both cohesive (it refers back to the watch) and coherent (the second sentence logically follows the first—the watch was faulty).
- Now look at this example (adapted from a classic linguistics exercise): “My grandmother gave me a watch. I like to eat apples on Tuesdays.” Here, we have no cohesive tie between the sentences. Without any linking device or shared lexis, the text is both incohesive and incoherent—it feels random.
- “My grandmother gave me a watch. That kind of sentimentality often skips a generation.” There is a cohesive tie (that refers back to the act of giving the watch), but is the text coherent? A reader might struggle to see the logical connection between receiving a watch and a generalisation about sentimentality skipping a generation. It is cohesive, but not coherent.
Problems with cohesion
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The “Connector-Overuser” A sample from learner writing (B2 level, exam class):
“Firstly, social media has many advantages. However, it also has disadvantages. Moreover, young people spend too much time online. Therefore, parents should set limits. Furthermore, schools should teach digital literacy.”
Comment: This paragraph is packed with cohesive devices— firstly, however, moreover, therefore, furthermore . On the surface, it looks cohesive. But is it coherent? The logical connections are weak. Why does “young people spend too much time online” lead to “parents should set limits”? The argument jumps without development. This is a problem often caused by teachers who drill the idea of using cohesive devices in their learners (because they think it looks good in an exam) but do not work on helping the learners generate ideas and consider the logical relationships/connections between these ideas. This issue is often. jokingly, called “the FCE writing syndrome”.
How to deal with it:
- Instead of simply removing some or all the connectors, ask the learner: What is the logical relationship between each sentence? Does each connector accurately reflect that relationship? Often, learners discover they have used therefore as a default “next point” marker rather than to signal a genuine cause-effect relationship.
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Show learners two versions of the same text: one with minimal number of cohesive devices (but clear and concise) and one artificially loaded with however, therefore, in addition (which does not make any sense). Ask them to decide which is more effective and why. This builds critical awareness of register-appropriate cohesion.
2. Missing or Incorrect Referent
Learner writing (B1 level, narrative):
“I went to the park with my friend. He was very crowded. It was difficult to find a place to sit.”
Comment: Here, the cohesive device he should refer to my friend , but the meaning clashes—a person is rarely “crowded.” The intended referent was the park . The learner has used reference incorrectly, creating a cohesive tie that undermines coherence.
How to deal with it: Use a simple reformulation task. Ask the learner to read the text aloud and identify who or what each pronoun refers to. Then provide a model: “I went to the park with my friend. The park was very crowded. We found it difficult to find a place to sit.” This draws attention to how accurate reference supports both cohesion and coherence.
3. Lexical Cohesion Without Logical Flow
Learner writing (C1 level, opinion essay)
“Climate change is an urgent issue. The issue requires global cooperation. Global cooperation has been attempted many times. Many times, these attempts have failed. Failure is not an option.”
Comment: This text demonstrates strong lexical cohesion— issue, global cooperation, many times, failure —each repeated or chained to the next. Yet the overall argument is circular. The text repeats itself without progressing.
How to deal with it: Introduce the concept of lexical chains (recurring semantic links) and ask learners to map them visually. Then ask: Does each sentence add new information, or are we cycling through the same ideas? This shifts learners’ focus from “using sophisticated vocabulary” to “developing an argument.”
Classroom Activities for Teaching Cohesion and Coherence
Activity 1: Scrambled Texts
Take a short paragraph (6–8 sentences) and cut it into strips. In pairs, learners reassemble it. First, give them a version with clear cohesive devices (pronouns, repeated lexis, conjunctions). Then, give them a second text with those devices removed. In the debrief, introduce the terms cohesion (the clues they used) and coherence (the logic they inferred). This works well with levels B1 and above.
Activity 2: Connector Bingo
Create a bingo card with cohesive devices ( however, therefore, this, these, in addition, for example ). As learners read a model text, they mark off devices they find. Then, in pairs, they discuss: Which devices are essential to the meaning? Which could be removed without losing clarity? This encourages critical evaluation rather than uncounted imitation.
Activity 3: Cohesion-Free Writing Challenge
Ask learners to write a short paragraph (e.g., instructions for a recipe or directions to a landmark) without using any pronouns or conjunctions . They quickly realise how unnatural this is. Then, ask them to rewrite it naturally and compare the two versions. This highlights the functional role of cohesive devices in a memorable, discovery-based way.
Activity 4: Diagnosing Peer Writing
After learners have written a first draft, pair them up with a simple checklist:
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- Circle all pronouns. Can you identify what each refers to?
- Underline all connectors. Does each accurately show the logical relationship?
- Highlight repeated key words. Does the text progress, or does it repeat the same idea?
- This peer feedback task builds metalinguistic awareness and reduces the teacher’s correction load.
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Why Does This Matter for Delta Candidates?
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Module 1 – Paper 1, Task 2
In Module 1, you are often asked to identify and label cohesive devices (reference, substitution, ellipsis, conjunction, lexical cohesion). Examiners frequently note that candidates can spot the devices but struggle to explain whether they succeed in creating coherence. The distinction is often what separates a pass from a merit.
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Module 2 – Background Essays
When writing an LSA (Language Systems or Skills Assignment) background essay, you might analyse a text for its discourse features. Saying “the text uses reference to create cohesion” is superficial. A stronger analysis explains whether those cohesive ties actually support the text’s purpose —for example, whether they help build an argument, establish a narrative voice, or guide a reader through complex information. Referencing classroom examples like the ones above demonstrates applied understanding.
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Teaching Practice
When you give learners feedback on their writing, it is easy to praise “good use of linking words” (cohesion) while overlooking whether the ideas actually connect (coherence). Explicitly teaching the difference helps learners move beyond checklist-style writing (“I must use ‘however’ and ‘therefore’”) toward producing texts that genuinely communicate. The activities above are exactly the kind of principled, awareness-raising interventions that Delta tutors look for in observed teaching practice.
Final Thoughts
For DELTA candidates, distinguishing cohesion from coherence is not just an academic exercise. It sharpens your ability to analyse texts, diagnose learner errors, and design more precise interventions. Whether you are preparing for the Module 1 exam, writing an LSA background essay, or developing your next lesson plan, keeping these two concepts separate will serve you well.
What are your experiences teaching cohesion or coherence? Have you tried any of the activities above? Share your thoughts in the comments below—or let us know if you’d like a follow-up post on diagnosing learner errors through cohesion analysis.
Further Reading:
– Halliday, M. A. K., & Hasan, R. (1976). Cohesion in English . London: Longman.
– Cambridge Delta Module 1 past paper chief examiners’ reports (available via your course centre).
– Thornbury, S. (2005). Beyond the Sentence: Introducing Discourse Analysis . Oxford: Macmillan.
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