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Coherence in Writing

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Have you ever read a piece of writing and wondered what point the writer was trying to make? If so, that piece of writing probably lacked coherence. Coherence is an important aspect of good writing—as important as good grammar or spelling. However, it is also rather harder to learn how to do it, because it is not a matter of simple rules.

Coherent writing moves smoothly between ideas. It guides the reader through an argument or series of points using signposts and connectors. It generally has a clear structure and consistent tone, with little or no repetition. Coherent writing feels planned —usually because it is. This page provides some tips to help you to develop your ability to write coherently.

Defining Coherence

Dictionary definition of coherence

cohere , v. to stick together, to be consistent, to fit together in a consistent, orderly whole.

coherence , a sticking together, consistency.

Source: Chambers English Dictionary, 1989 edition.

The dictionary definition of coherence is clear enough—but what does that mean in practical terms for writers?

Once you have achieved coherence in your writing, you will find that:

Your sentences and ideas are connected and flow together;

Readers can move easily through the text from one sentence, paragraph or idea to the next; and

Readers will be able to follow the ideas and main points of the text.

On the other hand, a text that is NOT coherent jumps between ideas without making clear connections between them. It is often hard to follow the argument. Readers may find themselves unclear about the point of particular paragraphs or even whole sections. There may be odd sentences that do not fit well with the previous or following sentence, or paragraphs that repeat earlier ideas.

All these issues provide pointers for how to develop coherence.

Elements of Coherence

There are several different elements that contribute to coherence, or are closely linked to the concept.

They include:

Cohesion , or whether ideas are linked within and between sentences.

Unity , or the extent to which a sentence, paragraph or section focuses on a single idea or group or ideas. In any given paragraph, every sentence should be relevant to a single focus.

A joint effort

Together, cohesion and unity mean that sentences and paragraphs are connected around a central theme.

• Flow , or how the reader is led through the text. Some of this is about the ordering of ideas, but it also takes into account issues like phrasing, rhythm and style. Some people define flow as the quality that makes writing engaging and easy to read.

Levels of Coherence

We can consider coherence at several different levels. These include:

Within sentences. A sentence is coherent when it flows naturally, and uses correct grammar , spelling and punctuation . Coherence also includes the use of the most appropriate words, and avoidance of redundancy.

Between sentences . Coherence between sentences means that each sentence flows logically and naturally from the previous one. Connections are made between them so that readers can see the flow of ideas, and how each sentence is linked to the previous one.

Within paragraphs . This is a logical extension of coherence between sentences. Coherence within a paragraph means that the sentences within the paragraph work together as a whole to present a complete thesis or idea.

Why single-sentence paragraphs don’t work

This definition of ‘within paragraph’ coherence explains why you should (almost) never use single-sentence paragraphs. A single sentence is (almost) never going to be able to provide a complete summary of your thesis or idea.

Between paragraphs . For most pieces of writing, you will also need to consider how the paragraphs fit together. Each paragraph covers an idea or thesis—and must then be connected logically to the next paragraph, so that your overall thesis is built step-by-step.

Between subsections or sections . This final level of coherence is only really important for longer documents. You must create a logical flow between different sections, to guide your reader from one to the next so that they can follow the development of your ideas.

Techniques to Improve Coherence

The first step to improving coherence is to plan your writing in advance.

Decide on the main point that you want to make, and the ideas that will lead your reader towards your point. It is also helpful to consider your planned audience, and what they want from your text.

There is  more about this in our page on Know Your Audience . You may also find it helpful to read our page on Know Your Medium , to check whether there is anything about your publishing medium that you need to consider ahead of starting to write.

There are some techniques that you can use to help improve coherence within your writing. These include:

Using transitional expressions and phrases to signal connections

Words and phrases like ‘however’, ‘because’, ‘therefore’, ‘additionally’, and ‘on the one hand... on the other’ can be used to signal connections between sentences and paragraphs.

WARNING! Real connections needed!

Transitional phrases and words should only be used where the ideas really are connected.

Just inserting transitional expressions will not connect your ideas. Instead, you need to create a reasonable progression of ideas through a paragraph or section.

You also need to use transitional expressions sparingly. Not all ideas need an obvious link—and sometimes putting one in can seem awkward and contrived.

Using repeating forms or parallel structures to emphasise links between ideas

Generally speaking, repetition of words and phrases is unadvisable.

However, used sparingly, you may be able to harness repetition as a way to signal connections between sentences or ideas.

For example, many research papers have a section setting out the limitations of the study. These limitations can often be quite diverse, which makes for a rather disjointed section. To overcome this issue, writers often use the form ‘First... Second... Finally...’ to demonstrate the links between the disparate ideas.

Using pronouns and synonyms to eliminate unnecessary repetition

Repetition is often the enemy of coherence because it interrupts your movement through the writing. You tend to get distracted by the repeated words, and lose the thread of the argument or idea.

Pronouns and synonyms are a good way to avoid repeating words and phrases. However, care is needed when using them, to avoid ambiguity. It is advisable NOT to use pronouns following a sentence with two elements that might take the same pronoun.

For example:

John was sure that Tom was wrong. He had made the same argument last week.

Who made the same argument last week? John or Tom?

It is better to use at least one name again than create ambiguity.

TOP TIP! Come back later

It is often hard to detect ambiguity in your own writing because you know what you wanted to say.

It is therefore a good idea to leave any piece of writing overnight, and read it again in the morning. This will often identify problems such as ambiguous pronouns, and give you a chance to revise them.

Revisit, Revise and Review

Alongside planning, the single most important thing that you can do to improve the coherence of a piece of writing is to review and revise it with the reader’s needs in mind.

When you have finished a piece of writing, put it aside for a while. Overnight is ideal, but longer is fine. Once you have had a chance to forget precisely what you meant, read it over again as if you were coming to it for the first time.

As you start to read, consider the focus of your text: the main point that you want to make.

With that in mind, consciously examine whether the ideas flow clearly through your sentences, paragraphs and sections. Can the reader grasp your argument and follow it through the text? Is there an obvious conclusion?

While you are reading, you should also consider whether there are any very long sentences. If so, shorten them, using transitional words or phrases to link them together effectively. This will make your writing easier to read, and it will naturally flow better.

A Final Thought

It is not always easy to know how to create more coherent writing.

The best way to do so is to plan your writing, and then review it carefully. You should particularly consider your focus, and your readers’ needs. In doing so, you may find it helpful to use some of the techniques described on this page—but they will not, in themselves, be sufficient without the planning and review.

Continue to: Writing Concisely Using Plain English

See also: The Importance of Structure in Writing Editing and Proofreading Copywriting

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What is cohesion?

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Cohesion How to make texts stick together

Cohesion and coherence are important features of academic writing. They are one of the features tested in exams of academic English, including the IELTS test and the TOEFL test . This page gives information on what cohesion is and how to achieve good cohesion. It also explains the difference between cohesion and coherence , and how to achieve good coherence. There is also an example essay to highlight the main features of cohesion mentioned in this section, as well as some exercises to help you practise.

For another look at the same content, check out YouTube or Youku , or the infographic .

It is important for the parts of a written text to be connected together. Another word for this is cohesion . This word comes from the verb cohere , which means 'to stick together'. Cohesion is therefore related to ensuring that the words and sentences you use stick together.

Good cohesion is achieved through the following five main methods, each of which is described in more detail below:

• repeated words/ideas
• reference words
• transition signals
• substitution

Two other ways in which cohesion is achieved in a text, which are covered less frequently in academic English courses, are shell nouns and thematic development . These are also considered below.

Repeated words/ideas

Check out the cohesion infographic »

One way to achieve cohesion is to repeat words, or to repeat ideas using different words (synonyms). Study the following example. Repeated words (or synonyms) are shown in bold.

Cohesion is an important feature of academic writing . It can help ensure that your writing coheres or 'sticks together', which will make it easier for the reader to follow the main ideas in your essay or report . You can achieve good cohesion by paying attention to five important features . The first of these is repeated words. The second key feature is reference words. The third one is transition signals. The fourth is substitution. The final important aspect is ellipsis.

In this example, the word cohesion is used several times, including as a verb ( coheres ). It is important, in academic writing, to avoid too much repetition, so using different word forms or synonyms is common. The word writing is also used several times, including the phrase essay or report , which is a synonym for writing . The words important features are also repeated, again using synonyms: key feature , important aspect .

Reference words

Reference words are words which are used to refer to something which is mentioned elsewhere in the text, usually in a preceding sentence. The most common type is pronouns, such as 'it' or 'this' or 'these'. Study the previous example again. This time, the reference words are shown in bold.

Cohesion is an important feature of academic writing. It can help ensure that your writing coheres or 'sticks together', which will make it easier for the reader to follow the main ideas in your essay or report. You can achieve good cohesion by paying attention to five important features. The first of these is repeated words. The second key feature is reference words. The third one is transition signals. The fourth is substitution. The final important aspect is ellipsis.

The words it , which and these are reference words. The first two of these, it and which , both refer to 'cohesion' used in the preceding sentence. The final example, these , refers to 'important features', again used in the sentence that precedes it.

Transition signals, also called cohesive devices or linking words, are words or phrases which show the relationship between ideas. There are many different types, the most common of which are explained in the next section on transition signals . Some examples of transition signals are:

• for example - used to give examples
• in contrast - used to show a contrasting or opposite idea
• first - used to show the first item in a list
• as a result - used to show a result or effect

Study the previous example again. This time, the transition signals are shown in bold. Here the transition signals simply give a list, relating to the five important features: first , second , third , fourth , and final .

Substitution

Substitution means using one or more words to replace (substitute) for one or more words used earlier in the text. Grammatically, it is similar to reference words, the main difference being that substitution is usually limited to the clause which follows the word(s) being substituted, whereas reference words can refer to something far back in the text. The most common words used for substitution are one , so , and auxiliary verbs such as do, have and be . The following is an example.

• Drinking alcohol before driving is illegal in many countries, since doing so can seriously impair one's ability to drive safely.

In this sentence, the phrase 'doing so' substitutes for the phrase 'drinking alcohol before driving' which appears at the beginning of the sentence.

Below is the example used throughout this section. There is just one example of substitution: the word one , which substitutes for the phrase 'important features'.

Ellipsis means leaving out one or more words, because the meaning is clear from the context. Ellipsis is sometimes called substitution by zero , since essentially one or more words are substituted with no word taking their place.

Below is the example passage again. There is one example of ellipsis: the phrase 'The fourth is', which means 'The fourth [important feature] is', so the words 'important feature' have been omitted.

Shell nouns

Shell nouns are abstract nouns which summarise the meaning of preceding or succeeding information. This summarising helps to generate cohesion. Shell nouns may also be called carrier nouns , signalling nouns , or anaphoric nouns . Examples are: approach, aspect, category, challenge, change, characteristics, class, difficulty, effect, event, fact, factor, feature, form, issue, manner, method, problem, process, purpose, reason, result, stage, subject, system, task, tendency, trend, and type . They are often used with pronouns 'this', 'these', 'that' or 'those', or with the definite article 'the'. For example:

• Virus transmission can be reduced via frequent washing of hands, use of face masks, and isolation of infected individuals. These methods , however, are not completely effective and transmission may still occur, especially among health workers who have close contact with infected individuals.
• An increasing number of overseas students are attending university in the UK. This trend has led to increased support networks for overseas students.

In the example passage used throughout this section, the word features serves as a shell noun, summarising the information later in the passage.

Cohesion is an important feature of academic writing. It can help ensure that your writing coheres or 'sticks together', which will make it easier for the reader to follow the main ideas in your essay or report. You can achieve good cohesion by paying attention to five important features . The first of these is repeated words. The second key feature is reference words. The third one is transition signals. The fourth is substitution. The final important aspect is ellipsis.

Thematic development

Cohesion can also be achieved by thematic development. The term theme refers to the first element of a sentence or clause. The development of the theme in the rest of the sentence is called the rheme . It is common for the rheme of one sentence to form the theme of the next sentence; this type of organisation is often referred to as given-to-new structure, and helps to make writing cohere.

Consider the following short passage, which is an extension of the first example above.

• Virus transmission can be reduced via frequent washing of hands, use of face masks, and isolation of infected individuals. These methods, however, are not completely effective and transmission may still occur, especially among health workers who have close contact with infected individuals. It is important for such health workers to pay particular attention to transmission methods and undergo regular screening.

Here we have the following pattern:

• Virus transmission [ theme ]
• can be reduced via frequent washing of hands, use of face masks, and isolation of infected individuals [ rheme ]
• These methods [ theme = rheme of preceding sentence ]
• are not completely effective and transmission may still occur, especially among health workers who have close contact with infected individuals [ rheme ]
• health workers [ theme, contained in rheme of preceding sentence ]
• [need to] to pay particular attention to transmission methods and undergo regular screening [ rheme ]

Cohesion vs. coherence

The words 'cohesion' and 'coherence' are often used together with a similar meaning, which relates to how a text joins together to make a unified whole. Although they are similar, they are not the same. Cohesion relates to the micro level of the text, i.e. the words and sentences and how they join together. Coherence , in contrast, relates to the organisation and connection of ideas and whether they can be understood by the reader, and as such is concerned with the macro level features of a text, such as topic sentences , thesis statement , the summary in the concluding paragraph (dealt with in the essay structure section), and other 'bigger' features including headings such as those used in reports .

Coherence can be improved by using an outline before writing (or a reverse outline , which is an outline written after the writing is finished), to check that the ideas are logical and well organised. Asking a peer to check the writing to see if it makes sense, i.e. peer feedback , is another way to help improve coherence in your writing.

Example essay

Below is an example essay. It is the one used in the persuasion essay section. Click on the different areas (in the shaded boxes to the right) to highlight the different cohesive aspects in this essay, i.e. repeated words/ideas, reference words, transition signals, substitution and ellipsis.

Title: Consider whether human activity has made the world a better place.

History shows that human beings have come a long way from where they started. They have developed new technologies which means that everybody can enjoy luxuries they never previously imagined. However , the technologies that are temporarily making this world a better place to live could well prove to be an ultimate disaster due to , among other things, the creation of nuclear weapons , increasing pollution , and loss of animal species . The biggest threat to the earth caused by modern human activity comes from the creation of nuclear weapons . Although it cannot be denied that countries have to defend themselves, the kind of weapons that some of them currently possess are far in excess of what is needed for defence . If these [nuclear] weapons were used, they could lead to the destruction of the entire planet . Another harm caused by human activity to this earth is pollution . People have become reliant on modern technology, which can have adverse effects on the environment . For example , reliance on cars causes air and noise pollution . Even seemingly innocent devices, such as computers and mobile phones, use electricity, most of which is produced from coal-burning power stations, which further adds to environmental pollution . If we do not curb our direct and indirect use of fossil fuels, the harm to the environment may be catastrophic. Animals are an important feature of this earth and the past decades have witnessed the extinction of a considerable number of animal species . This is the consequence of human encroachment on wildlife habitats, for example deforestation to expand cities. Some may argue that such loss of [animal]   species is natural and has occurred throughout earth's history. However , the current rate of [animal]   species loss far exceeds normal levels   [of animal species loss] , and is threatening to become a mass extinction event. In summary , there is no doubt that current human activities such as the creation of nuclear weapons , pollution , and destruction of wildlife , are harmful to the earth . It is important for us to see not only the short-term effects of our actions, but their long-term ones as well. Otherwise , human activities will be just another step towards destruction .

Aktas, R.N. and Cortes, V. (2008), 'Shell nouns as cohesive devices in published and ESL student writing', Journal of English for Academic Purposes , 7 (2008) 3-14.

Alexander, O., Argent, S. and Spencer, J. (2008) EAP Essentials: A teacher's guide to principles and practice . Reading: Garnet Publishing Ltd.

Gray, B. (2010) 'On the use of demonstrative pronouns and determiners as cohesive devices: A focus on sentence-initial this/these in academic prose', Journal of English for Academic Purposes , 9 (2010) 167-183.

Halliday, M. A. K., and Hasan, R. (1976). Cohesion in English . London: Longman.

Hinkel, E. (2004). Teaching Academic ESL Writing: Practical Techniques in Vocabulary and Grammar . Mahwah: Lawrence Erlbaum Associates Inc Publishers.

Hyland, K. (2006) English for Academic Purposes: An advanced resource book . Abingdon: Routledge.

Thornbury, S. (2005) Beyond the Sentence: Introducing discourse analysis . Oxford: Macmillan Education.

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Below is a checklist for essay cohesion and coherence. Use it to check your own writing, or get a peer (another student) to help you.

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Author: Sheldon Smith    ‖    Last modified: 03 February 2022.

Sheldon Smith is the founder and editor of EAPFoundation.com. He has been teaching English for Academic Purposes since 2004. Find out more about him in the about section and connect with him on Twitter , Facebook and LinkedIn .

Compare & contrast essays examine the similarities of two or more objects, and the differences.

Cause & effect essays consider the reasons (or causes) for something, then discuss the results (or effects).

Discussion essays require you to examine both sides of a situation and to conclude by saying which side you favour.

Problem-solution essays are a sub-type of SPSE essays (Situation, Problem, Solution, Evaluation).

Transition signals are useful in achieving good cohesion and coherence in your writing.

Reporting verbs are used to link your in-text citations to the information cited.