Paragraph One: Introduction
Three reasons for my opinion
Paragraph Two: Develops the first reason by giving examples
Develops the second reason, giving facts and statistics to support the statement.
Develops third reason, giving an example
Paragraph Five: Conclusion
Restatement of thesis
Summary of reasons
Why You Should Vaccinate Your Kids
sample essay for student use by Trudy Morgan-Cole
Since Edward Jenner introduced the first successful smallpox vaccine by injecting an eight-year-old boy with cowpox pus in 1796, vaccines have been an important part of public health care around the world (“Edward Jenner”). Yet today, many parents choose not to vaccinate their children. Because vaccines are widely supported by research, have few side effects, and have proven successful in halting the spread of disease, I believe it is important that all parents continue to vaccinate their children.
All major health organizations, including the Centres for Disease Control and the World Health Organization, recommend vaccination. The value of vaccination is supported by research from around the world, and researchers are constantly working to improve the safety and effectiveness of vaccines. Epidemiologists, the scientists whose job is to study the outbreak of disease, all recommend vaccination.
Many parents worry about the safety of vaccines. While side effects do occur, they are usually minor, like redness or swelling around the site of an injection. In Canada, only about one in a million doses of vaccine leads to serious side effects (“Fact and Fiction”). The most famous study linking vaccines to autism, one which got many parents worried about vaccination, has been proven false and the doctor who conducted the study has had his medical license taken away (Triggle).
Around the world, increased vaccination leads to better public health. Diseases like smallpox and polio which once killed and disabled millions of people are virtually unknown today thanks to immunization programs. Yet in countries like Afghanistan and Pakistan where the Taliban discourage immunization, rates of polio are on the rise again (Nordland).
If and when you have children, please get them vaccinated. The risks are minimal and you’ll not only be following the best advice of medical science and protecting your own child from disease; you’ll be helping in the fight to eradicate infectious diseases in your community and around the world.
“Edward Jenner (1749-1823),” BBC History: Historic Figures. http://www.bbc.co.uk/history/historic_figures/jenner_edward.shtml
“Immunization Fact and Fiction,” Public Health Agency of Canada. http://www.phac-aspc.gc.ca/im/iyc-vve/fic
Nordland, Rod, “After Year of Decline, PolioCases in Afghanistan Triple in a Year.” The New York Times, Jan. 17, 2012. http://www.nytimes.com/2012/01/18/world/asia/after-years-of-decline-polio-cases-in-afghanistan-rise.html
Triggle, Nick, “MMR Doctor Struck from Register,” BBC News. http://news.bbc.co.uk/2/hi/health/8695267.stm
What types of information should you include in your introduction?
In the introduction of your thesis, you’ll be trying to do three main things, which are called Moves:
- Move 1 establish your territory (say what the topic is about)
- Move 2 establish a niche (show why there needs to be further research on your topic)
- Move 3 introduce the current research (make hypotheses; state the research questions)
Each Move has a number of stages. Depending on what you need to say in your introduction, you might use one or more stages. Table 1 provides you with a list of the most commonly occurring stages of introductions in Honours theses (colour-coded to show the Moves). You will also find examples of Introductions, divided into stages with sample sentence extracts. Once you’ve looked at Examples 1 and 2, try the exercise that follows.
Most thesis introductions include SOME (but not all) of the stages listed below. There are variations between different Schools and between different theses, depending on the purpose of the thesis.
Stages in a thesis introduction
- state the general topic and give some background
- provide a review of the literature related to the topic
- define the terms and scope of the topic
- outline the current situation
- evaluate the current situation (advantages/ disadvantages) and identify the gap
- identify the importance of the proposed research
- state the research problem/ questions
- state the research aims and/or research objectives
- state the hypotheses
- outline the order of information in the thesis
- outline the methodology
Now read the following two examples from past theses, noting which stages are included in each example. How does example 1 differ from example 2?
Read the following sample sentence extracts from Honours theses Introductions. When you have decided what stage of the Introduction they belong to, refer to the stages in a thesis introduction and give each sentence extract a number. Then check the suggested answer to see if your answer agrees with ours.
Example 3: The IMO Severe-Weather Criterion Applied to High-Speed Monohulls (School of Mechanical and Manufacturing Engineering)
Example 4: The Steiner Tree Problem (School of Computer Science and Engineering)
What does this tell you about thesis introductions?
Well, firstly, there are many choices that you can make. You will notice that there are variations not only between the different Schools in your faculty, but also between individual theses, depending on the type of information that is being communicated. However, there are a few elements that a good Introduction should include, at the very minimum:
- Either Statement of general topic Or Background information about the topic;
- Either Identification of disadvantages of current situation Or Identification of the gap in current research;
- Identification of importance of proposed research
- Either Statement of aims Or Statement of objectives
- An Outline of the order of information in the thesis
Note: this introduction includes the literature review.
Example 5.1 (extract 1): The effects of Fluoride on the reproduction of three native Australian plant Species (School of Geography)
|Stage 1||Sample sentence extracts (the complete Introduction is 17 pages long)|
|Give some background (p.1 of 17)|
1.1 Fluoride in the environment
Molecular fluorine (F2) is the most electronegative of the elements and therefore is highly reactive. Due to its high reactivity it is never found in its elemental form in nature. It combines directly at both ordinary or elevated temperatures with all other elements except oxygen, nitrogen, and the lighter noble gases (Cotton & Wilkinson, 1980).
Example 5.2 (extract 2): The effects of Fluoride on the reproduction of three native Australian plant Species (School of Geography)
|Stage 2||Sample sentence extracts|
|Provide a review of the literature related to the topic (p.2 of 17)||The main source of elevated fluoride in plants comes from atmospheric industrial pollution. Because of its extensive industrial use, hydrogen fluoride is probably the greatest single atmospheric fluoride contaminant and is generally considered to be the most important plant pathogenic fluoride (WHO, 1984; Treshow, 1965)… However, fluorides can cause damage to sensitive plant species even at extremely low fluoride concentrations(Hill,1969), accumulate in large amounts within the plant and cause disease if ingested by herbivores(Weinstein, 1977).|
|Stages 4 and 5||Sample sentence extracts|
|Outline the current situation; Evaluate the current situation and indicate a gap (p.12 of 17)||Doley (1981) summarized several unpublished studies that compared the sensitivity rankings of 24 species according to the responses of photosynthesis and the development of visible injury symptoms. This analysis showed that for nine species, photosynthesis measurements indicated greater sensitivity than was obvious from visible assessment, and for seven species the converse applied. This indicated that, while it may generally be true that physiological responses occur at lower doses than visible injury, this does not always appear to be the case.|
Example 5.4 (extract 4): The effects of Fluoride on the reproduction of three native Australian plant Species (School of Geography)
|Stage 7||Sample sentence extracts|
|State the research problem(p.4 of 17)||In many Australian plant species, young expanding leaves appear much more severely injured by gaseous fluorides than are old leaves. This suggests, either that the young leaf tissues are more sensitive to fluoride than mature tissues, or that sufficient fluoride enters the tissues directly through the cuticle to disrupt normal leaf development before the stomata have fully developed and opened(Doley, 1986a). This question has not been resolved due to the inability to accurately localize low concentrations of fluoride(Doley, 1986a)|
Example 5.5 (extract 5): The effects of Fluoride on the reproduction of three native Australian plant Species (School of Geography)
|Stage 8||Sample sentence extracts|
|State the research aims and /or research objectives (extract p.16 of 17)||Knowledge of the effects of fluoride on the reproductive processes of species within a forest community will help predict potential changes within the community following an increase in atmospheric fluoride due to additional industrial sources, such as aluminium smelters. For these reasons, this project was designed to investigate the reproductive processes of selected species in a woodland near the aluminium smelter at Tomago.|
Example 5.6 (extract 6): The effects of Fluoride on the reproduction of three native Australian plant Species (School of Geography)
|Stage 11||Sample sentence extracts|
|State the outline of the Methodology (extract p.17 of 17).||Germination trials were performed on seeds collected from each species along the fluoride gradient to determine if fluoride has an effect on their viability and hence the regeneration fitness of each species. A density study was used to determine if there were any differences between numbers of mature and immature trees, number of trees producing seed follicles and the number of trees flowering in this season along a fluoride gradient. By using soils collected at various distances away from the smelter the study also investigated differences in germination from the natural soil seed reserve along a fluoride gradient.|