Category Archives: Writing a thesis

Should we use active or passive voice?


The traditional criticism of active voice

Traditionally, science and academic writers were strongly advised to use passive voice in order to maintain objectivity. However, this view is based on the criticism of using the first person (‘I’ or ‘my’) in that an individual’s view or perspective was considered biased. For example, the proponents of the passive voice in science writing claim that the active construction “I observed the behaviour.” presents a subjective view, while the passive construction “The behaviour was observed.” presents a more objective perspective. Some also argue that the use of personal pronouns in science and academic writing gives the impression of stating an opinion. However, active voice is not governed by the use of personal pronouns. You can write in passive voice while using a personal pronoun. For example: “I was photographed by my friend”. 

What is meant by ‘voice’?

In simple terms, ‘voice’ refers to the relationship between the subject and the verb.

How to identify active voice

Active voice is when the grammatical subject performs the action specified by the verb. 

For example:

Active voice: “I produced ten surveys.” The subject is the person “I” who performs the action “produced”. 

How to identify passive voice

Passive voice is when the grammatical subject of the sentence is receiving the action specified by the verb. Passive voice always has the verb form ‘to be’ followed be a past participle. ‘To be’ verbs include: ‘is’, ‘are’, ‘am’, ‘was’, ‘were’, ‘has been’, ‘have been’, ‘will be’, ‘will have been’ and ‘being’. They are also known as linking verbs. A past participle is a past tense verb that often (but not always) ends in ‘ed’.


For example:

Passive voice: “Ten surveys were produced”. The subject is the “surveys” that receives the action “were produced”. In this sentence, the reader does not know who or what produced the surveys.

Passive voice with an object: “Ten surveys were produced by me”. In this example, the object of the sentence specifies who (or what) performs the action (me).

The criticism of passive voice

The insistence that writers should always avoid the personal pronouns (or the first person) has lessened and the use of active voice is increasingly encouraged. Key criticisms of passive voice are that the reader does not know who or what was responsible for the action described in the sentence and that passive sentence constructions are often wordy and vague.

Both types of voice are necessary for good, clear writing

Whether you use active or passive depends upon what you are writing and what you need to focus on.

1. If it is necessary to specify who or what performed the action

Without adding an object identifying the performer of the action, passive construction can make it difficult to know who did what.

For example:

“The effectiveness of stem cell treatment was investigated.”  With this statement the reader might be unsure who did the investigation. They might assume that the authors are referring to another study. Whereas, “We investigated the effectiveness of stem cell treatment.” clearly lets the reader know that the authors did the investigation.

If a sentence is to remain passive, a citation might be necessary to let the reader know who did the investigation.

2. If it is necessary to focus on the action itself

The following example is from the methods section of a recent research paper, which uses both passive and active voice. Here the focus is on what was measured, determined, distinguished and compared. Continual reference to who did the measuring is not necessary.

 “The abundance, sex ratio, and age structure of GT and NGT trees were determined by designating 47 plots (50 m × 50 m) in the six sites in the main GIAHS area (Fig. 1a). Morphological difference of GT and NGT trees was distinguished by identifying the graft scar just above ground. In each plot, we measured the location, basal diameter (BD), and sex of each of each torreya tree. The sex ratio of NGT trees was calculated in each plot. The population density (number per ha) of GT and NGT trees was statistically compared with a t-test in R.” p 8. Zang et al. 2019

3. If the person or thing responsible for the action is unknown

For example:

Passive: “The car was stolen.”

Active: “Somebody stole my car.”

4. When explaining cause and effect 

For example:

Passive: "Most malaria cases are caused by the parasite Plasmodium falciparum".

Active: "The parasite Plasmodium falciparum causes most cases of malaria".


5. If it is necessary to deliberately avoid specifying authorship

Some government departments, consultancies and corporations produce documents where acknowledgement of individual authors is deliberately avoided. This might occur when documents are designed to represent the organisation in its entirety or when a variety of different authors design, write and update documents.

For example:

- Passive: “The remediation program was initiated in early 2015”.

- Active: “Land & Water initiated the remediation program in early 2015”.

In these cases, the third person (we) may be used to collectively represent the organisation or institution.

6. If changing voice will make your writing more concise

If you do not need to specify who did what, your writing can be more concise.

For example:

- “We found that an increase in production rate was caused by increasing the length of the probe.” (16 words)

- “An increase in production rate was caused by increasing the length of the probe.” (14 words).

Changing to active voice makes the sentence shorter and more direct.

- “Increasing the length of the probe caused an increase in production rate.” (12 words).

Finally...

As passive voice is commonly in past tense, some confuse past tense with passive voice. Tense explains when something happened while voice explains who or what performs the action. Here are examples of active and passive voice written in the three different tenses.

For example:

Passive voice

Past tense: "The problem was investigated by me".

Present tense: "The problem is being investigated by me".

Future tense: "The problem will be investigated by me".

Active voice

Past tense: "I investigated the problem".

Present tense: "I am investigating the problem".

Future tense: "I will investigate the problem".

© Dr Marina Hurley 2019 www.writingclearscience.com.au

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Two ways to be an INefficient writer


Science is often complicated and writing about a scientific topic can be like trying to untangle spaghetti. Writing efficiently can also be a struggle if you are exploring an unfamiliar topic or haven’t had a lot of writing experience. Irrespective of experience, there are two types of writing behaviour that will greatly reduce productivity and confidence.

1. Writing without having a clear understanding of your core topic

Your core topic includes your document aims and objectives and the key problems you are aiming to solve, together with an explanation of how your topic fits within your discipline. Starting to write without a clear idea about the depth and breadth of your topic can be time-consuming. Every scientific topic may be linked to dozens of other sub-topics that at first consideration appear just as important as your original topic. It is often tempting to try and include them and look for a way to link them all together. Without clear focus, it is easy to drift away from your topic and you may not realise that you are actually writing about five topics instead of one.

It can be easy to get distracted from your main story by adding excessive and seemingly, interesting details. Avoid the desire to update the reader with every twist and turn, every exception to the rule, and every related, but not-so-important, detail.

2. Polishing: trying to write perfectly in a first draft

Inefficient writers often start by writing a burst of fresh thoughts and then immediately spend considerable effort rewriting, editing, and proofreading this material before writing a fresh block of text. This is also known as polishing your writing. Polishing in early drafts is an easy trap to fall into when writing on-screen: each time you open a file, it is tempting to first read, review and then re-edit the existing text before writing fresh material. As the document develops, what is written earlier is continually reconsidered, rewritten and re-edited while what is written later receives far less attention.

Polishing in the early stages of writing can be a form of procrastination where you allow yourself to get distracted from the important thinking time and problem-solving needed to design your document.

People often believe that they should be writing perfectly the first time and get frustrated at the seemingly endless amount of time it takes to complete a document. Some people imagine that innumerable drafts and rewrites will be needed and suspect that they will never be happy with the final product. Labouring over a single sentence while thinking you still have 1000 more to write is daunting.

Polishing your sentences is necessary in later drafts when fine-tuning your ideas and improving your message for the reader. Inefficient writers polish early, while efficient writers polish after they have worked out what they want to say.

© Dr Marina Hurley 2019 www.writingclearscience.com.au

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Twelve common mistakes when writing an abstract


An abstract is typically the summary or overview of a scientific paper, thesis or report. The purpose of the abstract is to give your reader a complete summary of your entire project. As there is a never-ending supply of papers and reports to read, you only have two chances to engage your reader and to convince them to keep reading. The first is the title (and the keywords) and the second is the abstract.

A well-written abstract will maximise the chances of your document being read, understood and even enjoyed. If writing a research paper, a well-written abstract will maximise your publication success. Not only will reviewers appreciate a good abstract, it may be the only part of the paper they are sent when invited to review a paper.

This focus of this article is to highlight what is commonly wrong with abstracts. Please note: The relevancy of some issues raised here might depend upon your discipline or document type. For example, some academic journals do not require abstracts at all or only require a very brief project overview.


These common mistakes are not listed in any particular order and some overlap:

1. Not writing a summary

The abstract should be a complete, succinct summary of your entire project. Summarising is being able to identify and highlight key points using as few words as possible.

2. Not paraphrasing your own work

Paraphrasing is when you use your own words to convey meaning from another source, with the aim of improving clarity. Paraphrasing often includes summarising. One common mistake is to copy entire sentences from different parts of the paper into the abstract. This is not summarising or paraphrasing.

3. Not summarising your entire project

A common mistake is to only include certain parts of the project in the abstract. If your paper is structured into Introduction, Methods, Results and Discussion sections, then your abstract includes a summary of each section, often written as a complete paragraph or with headings. If the abstract lacks key information, for example the aim or the conclusions, the reader may not appreciate the strength of importance of your project and not be convinced to keep reading. Don’t assume your reader will search through your document for this information if they can’t find it in the abstract.

4. Using the abstract as a de facto Introduction or Discussion

After writing important introductory and conclusion explanations in the abstract, some authors then don’t include these details in the body of the document, fearing it will look repetitive. This can happen if the abstract is written before designing the rest of the document. Although drafting an abstract in the early stages of writing is a good idea, it is best to finalise your abstract when you have finished the rest of your document.

5. Including too much (or not enough) background

If the abstract is considered a de facto introduction, too much background may be included. Alternatively, a brief summary of the background might be omitted if the author assumes the audience is completely familiar with the project topic and the background. Never assume your reader knows your topic or project as thoroughly as you do; some of you readers might, but they will still need this information to appreciate what your document is about.

6. Including too many (or not enough) methods

A brief summary of the methods or procedure is important as they are a key component of any project. Given the potential complexity and diversity of a scientific study, it is easy to add too much detail about methods; an example is the unnecessary listing of all data collection instruments and their brand names. The following example from a research paper abstract is a concise summary of the methods. “Methods: We systematically reviewed the literature and meta-analyzed risk estimates from longitudinal studies reporting the association of coronary heart disease (CHD) or heart failure (HF) with risk of dementia.” Wolters F.J. et al. (2018)

7. Not explaining what your results mean

As your abstract should include a summary of all parts of your project, this includes a summary of the discussion or conclusion of your study. Some authors omit interpreting their results, expecting the reader to wait until they have read the entire document. They may not.

8. Including citations, abbreviations and detailed measurements

Standard convention is to avoid writing abbreviations, detailed measurements or citations in an abstract. In some cases, and in some disciplines, it may be difficult to avoid using abbreviations if they are used as terms, are not written in any other format, difficult to write in full or impractical to leave out.

9. Including information not presented in the paper

It may be tempting to include extra information that is not in the rest of the document but this is misleading. Stick to your key aim.

10. Not following the Instructions to Authors of your target journal

A journals’ Instructions to Authors are just that: instructions; they are not suggestions or simply good ideas, nor are they meant to replace a science style guide. Depending upon the extent of this omission, not following a journal’s Instructions to Authors can dramatically increase the likelihood your paper will instantly returned for further changes.

11. Not including keywords

Keywords of your study are essential to ensure that your paper is correctly indexed and so your document will be visible in different search engines. Some authors assume this step is not necessary, assuming that all terms will be visible. Keywords “help promote an article’s visibility within the publications iceberg”.

12. Not giving the conclusion

Sometimes authors leave out the conclusion or the summary of their findings as they expect the reader will then go on to read the entire paper to find the answer. However, if the reader cannot find the answers in your abstract, they may just skip your paper and go onto the next one on their list. Also, leaving out the conclusion goes against the tenet that an abstract should be a summary of the entire paper.


Remember:

  • Don't assume your readers know a little less that you do.
  • Don't assume all published papers have good abstracts.
  • Seek feedback before finalising your later drafts.


© Dr Marina Hurley 2025 www.writingclearscience.com.au

Any suggestions or comments please email admin@writingclearscience.com.au 

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11 tips for the struggling ESL science writer


For most people, learning a second language is a struggle, let alone learning how to be a proficient science writer in that language. The following tips and suggestions will help the struggling ESL science writer both identify and tackle common writing obstacles.

1. Don’t aim to learn all the rules of grammar before you start writing

It can take a long time to be proficient in all the English rules of grammar. Even many experienced writers with English as their first language are not proficient at English grammar rules, relying on their innate knowledge of the language when writing. Instead of thinking you need to learn every English grammar rule, concentrate upon the most common grammar errors when learning English as a second language. In a 2017 study, the most common written grammar errors by ESL tertiary students were found to be Subject – Verb Agreement (SVA) and Verb Tense (Singh et al. 2017).

2. Avoid trying to make your English grammatically-perfect in your early drafts

While the final version of your document should be grammatically correct, don’t worry about having perfect grammar before you start or when preparing early drafts. In your first draft, concentrate upon getting your ideas down and ensure you are addressing a clearly defined aim. You can fix up your grammar as you edit and rework your later drafts.

3. Try writing your first draft in your first language

If writing in English is a significant obstacle to getting your thoughts down, try writing your first draft in your first language to allow you to first concentrate upon writing about your topic clearly. Once you are satisfied with the progress of your document, you can then translate your writing into English and also seek assistance from a science editor to help you correct your grammar.

4. Continue with English conversation classes

Science writers who struggle to improve their written English, are also often not yet proficient in spoken English. Continuing with weekly or monthly English conversation classes will not only improve your written English, but will allow you to pick up commonly-used English vocabulary and terminology.

5. Ask a friend or colleague to regularly give you feedback on your spoken English

Normally, friends or colleagues will not correct your spoken English and unless you are continuing your conversation classes, it may take you a long time to learn where you need to improve. Try asking a friend or colleague to regularly give you feedback on your spoken English.

6. Ask a friend or colleague to give you feedback on late drafts of your document

In addition to any editing and feedback you might receive from co-authors, colleagues or managers, try asking a friend or colleague to give you feedback, specifically on your English grammar and word use. This person need not be an expert in English grammar but be ask them to point out any obvious anomalies in your writing. Having someone focus on giving you feedback on your English will allow other colleagues to focus on giving you feedback on the scientific aspects of your work. In return, you could also offer to give feedback on your colleagues’ writing. This will also help you to improve your writing as critiquing the work of other writers allows you to notice areas of improvement you might not see in your own work.

7. Use online grammar exercises to improve your grammar

Grammar textbooks are excellent as reference texts to look up individual rules, while online grammar exercises are a good way to learn how to correct grammar using real examples. Online grammar exercises immediately provide both corrections and explanations.

8. Avoid online forums to learn about grammar rules

Grammar queries that are posted in online forums (for example Quora) are invariably answered by both experts and non-experts and some answers can be incorrect. This makes it difficult to decide which is the correct answer to follow. Also, there are some grammar rules that are more difficult to follow than others, especially if there are many exceptions to the rule; for example, the spelling rule ‘i’ before ‘e’ except after ‘c’. Only refer to reputable grammar websites that are specifically designed for education.

9. Be aware that not everyone agrees about what is correct English grammar

Be aware that not everyone agrees about what is correct English grammar and what is acceptable vocabulary. For example, some experts advise never to use contractions (for example “We’re” instead of “We are”) in scholarly or formal writing, yet contractions do not change the accuracy of the message and are argued to make reading more enjoyable.

Choose 3-5 grammar references that are reputable and written by trained, professional experts and consistently follow their advice. Also aim to follow the standard references and style guides for your discipline and institution.

10. Hire an editor that can explain grammar rules

If appropriate for your circumstances and if you have the resources, hire an editor proficient at explaining grammar and ask them to give you regular feedback on your writing.

11. If using ChatGPT (or other AI programs) use Word's 'Compare Document' feature so you can check what changes have been made

Although ChatGPT might fix most of your grammar errors, just applying its changes won't help you learn to improve your writing. Also, you cannot be sure that ChatGPT won't make mistakes. 

If you do use ChatGPT, use Word's Compare Document feature so you can check what changes have been made. Whenever you use ChatGPT, you need to check that any changes haven't changed your intended meaning

© Dr Marina Hurley 2025 www.writingclearscience.com.au

Any suggestions or comments please email info@writingclearscience.com.au

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University Policies on the Use of Artificial Intelligence


I will be writing about the use of AI for science writing in upcoming blogposts and even if you are not a university student, finding out what is being taught and recommended at universities is a good place to start.

I am interested in knowing how many Australian Universities have a policy on the use of Artificial Intelligence by staff and students for the purposes of teaching, learning and assessment. So, I asked ChatGPT to produce a list of all Australian University websites that include AI-related policy - see the list below from nine universities. Although this list is not complete I thought I would share it here for future reference. 

If the university you are interested in is not in this list, just type the universities url plus  'AI policy' into the url address bar. I add this explanation here as some people do not know that you don't need to go to a google search bar to do a search. 

For example, Adelaide University is not in this list, and my search produced three pages: 


University

                 AI / Generative AI Policy / Academic-Integrity-AI Page

ANU (Australian National University)

Guide for students: best practice when using generative AI — ANU academic integrity guidance. Australian National University

Macquarie University

Responsible & Ethical Use of AI Policy. policies.mq.edu.au+1

University of Melbourne

Artificial intelligence tools & technologies page on AI & academic integrity. Academic integrity
Also their “university policy & actions” on AI. Academic integrity

Swinburne University of Technology

- AI Usage Procedures Swinburne University
- AI Guidelines (ethical use) Swinburne University

Federation University

Artificial Intelligence Guidelines (teaching, research, operations) Federation University Policy

University of Sydney

Academic integrity / AI page: use of generative AI, assessment “two-lane” policy. The University of Sydney
Also, “Using artificial intelligence tools responsibly” guidance. The University of Sydney
News on their AI-assessment policy. The University of Sydney

James Cook University (JCU)

- Artificial Intelligence Policy (governance) James Cook University+1
- Generative AI & Academic Integrity for students. James Cook University

Western Sydney University

Use of Artificial Intelligence Policy (learning, teaching, assessment, research) policies.westernsydney.edu.au
Also academic integrity page covering AI. Western Sydney University: Home

University of Wollongong

GenAI in assessment — policy / guide for students about using generative AI tools. University of Wollongong

Do you have an AI policy in your workplace? If so, I would be grateful to learn more about more examples. Please email admin@writingclearscience.com.au

If you want to be kept up-to-date on future blogs on on this and other science writing topics, or if you want to hear more about what I teach you can join my mailing list here.

© Dr Marina Hurley 2025 www.writingclearscience.com.au

Any suggestions or comments please email admin@writingclearscience.com.au 

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