Two Concepts That Are Often Confused
Cohesion and coherence are two of the most frequently invoked concepts in academic writing feedback, and they are often used as though they mean the same thing. They do not. Understanding the difference between cohesion and coherence in thesis writing — and knowing how to check for both during proofreading — is one of the more sophisticated writing skills that separates a good thesis from a very good one.
Coherence refers to the logical organisation of ideas at the global level — whether the overall argument of a chapter or section makes sense, whether ideas are arranged in a sequence that the reader can follow, and whether each part of the writing connects meaningfully to the whole. A chapter is coherent when a reader finishing it understands not just what each paragraph said but what the chapter as a whole established and why it matters for the thesis.
Cohesion refers to the local, sentence-level connections that link one sentence to the next within a paragraph, and one paragraph to the next within a section. It is achieved through specific grammatical and lexical devices — pronouns that refer back to named entities, transitional words that signal logical relationships, repeated key terms that create thematic threads, and parallel sentence structures that show equivalent relationships. A passage can be locally cohesive — each sentence connecting grammatically to the previous one — while still lacking global coherence, because cohesion and coherence operate at different levels of the text.
Why Malaysian Thesis Writers Struggle With Coherence
Global coherence is the harder of the two to achieve and the harder to check during self-proofreading, precisely because it requires stepping back from the sentence level and evaluating the architecture of an entire chapter or section. Malaysian postgraduate students writing in English as an additional language often develop strong sentence-level skills — correct grammar, adequate vocabulary, appropriate hedging — while finding it more difficult to manage the macro-level organisation of extended academic arguments.
The most common coherence problem in Malaysian thesis chapters is the absence of a clear argumentative thread running through the chapter. Individual paragraphs may be well written and individually logical, but they sit next to each other without a discernible progression — the reader cannot tell why this paragraph follows that one, or what the series of paragraphs collectively establishes. This creates a reading experience of isolated points rather than a sustained argument, which is what examiners describe when they say a chapter “lacks focus” or “doesn’t flow logically.”
Building Coherence Through Planning Before Writing
Coherence in thesis writing is most efficiently built before writing rather than revised in after the fact. Before drafting or revising a chapter, create a simple outline that lists the main claim of each section and how each section’s claim contributes to the chapter’s overall argument. The question to ask for each section is: what does this section establish, and why does the thesis need this to be established at this point?
If you cannot answer this question clearly for a section, the section either has an unclear purpose or has been placed in the wrong position in the chapter. Both problems are structural and need to be addressed at the outline level before they can be fixed at the paragraph level. Trying to revise your way to coherence by editing individual sentences in a structurally incoherent chapter is like rearranging furniture in a room with the wrong floor plan — the room will still not work regardless of how nice each piece of furniture is individually.
Building Cohesion Through Deliberate Linking Devices
Cohesion in thesis writing is built through a specific set of tools that experienced academic writers use deliberately rather than instinctively. The most important of these are referential cohesion, lexical cohesion, and conjunctive cohesion.
Referential cohesion is created through pronouns and demonstrative references — “this finding”, “these results”, “the above”, “the latter” — that point back to named entities in preceding sentences. Lexical cohesion is created through the repetition of key terms or the use of synonymous expressions that carry a meaning thread across sentences. Conjunctive cohesion is created through transitional words and phrases — “however”, “therefore”, “in contrast”, “consequently” — that signal the logical relationship between sentences.
When these devices are absent, writing feels disconnected even when each individual sentence is correct. When they are overused or used inaccurately — particularly when “this” or “it” refers ambiguously to more than one possible antecedent — they create confusion rather than connection. During proofreading, checking cohesion means reading paragraph by paragraph and asking: does each sentence connect explicitly to the one before it? Are my referential pronouns unambiguous? Do my transitional words accurately describe the relationship between the ideas they connect?
A Quick Self-Check for Both Cohesion and Coherence
Two simple checks can reveal the cohesion and coherence status of your thesis writing quickly during proofreading. For coherence, read only the topic sentence of each paragraph in a chapter in sequence, skipping all supporting sentences. This extracted topic sentence sequence should read as a logical, progressive argument that moves coherently from the chapter’s opening claim to its conclusion. If it does not — if the topic sentences jump between unrelated points, repeat the same point, or fail to build toward a conclusion — the chapter lacks global coherence and needs structural revision.
For cohesion, read the last sentence of one paragraph and the first sentence of the next paragraph together, checking whether there is an explicit connection between them. If the transition from one paragraph to the next feels abrupt or disconnected, a cohesive link is missing — either a transitional phrase at the start of the new paragraph or a forward-looking sentence at the end of the previous one. Running these two checks across your most important chapters — your literature review and discussion in particular — reveals both the global argument quality and the local connection quality of your thesis writing, and gives you a concrete basis for the revisions that will most meaningfully improve how your examiner experiences reading your work.
