How to Write a Hypothesis for a Dissertation
Types of Hypotheses
When writing a dissertation, it is common practice to develop a hypothesis based on the research a writer has undertaken. A hypothesis often predicts some type of relationship and it usually takes the form of a “research” or an “alternative” hypothesis. For the purpose of balancing the findings of a piece of research work, it is also necessary to create another type of hypothesis – a “null” one. This latter type serves the purpose of claiming the non-existence of a predicted relationship in a “research” hypothesis. Experts say that, when directly tested, the null hypothesis does not predict any effect, and the “alternative” hypothesis contradicts the former by predicting an effect. Additionally, the “research” type of hypothesis can take different forms. A knowledge base entitled Research Methods indicates there are “one-tailed” and “two-tailed” research hypotheses where, respectively, the first type specifies a particular direction (e.g., an increasing direction or a decreasing direction) and the second type specifies a change only rather than a direction.
Writing a Hypothesis
A hypothesis should be written before data is collected and analyzed. An effective hypothesis should be capable of being tested and should include a variable of the independent variety, which the writer controls. It should also have a variable of the dependent variety, which is measured or observed against the independent type. Say, for instance, you take as your independent variable the way the media reports on violence and the dependent variable as aggression. In this case, your “null” hypothesis might state that, “the way the media reports on violence does not affect aggression.” Therefore, your “alternative” hypothesis might state that, “the way the media reports on violence does affect aggression.” Likewise, to develop a “one-tailed” hypothesis, you may well state that, “the way the media reports on violence leads to an increase in aggression.” However, in all cases, it is important to ensure statements are short and to-the point. Additionally, you should keep the results that will be measured later on in your project in mind.
Hypothesis is important when your work should determine whether a certain prediction regarding the relation between variables is right. Oftentimes, they are presented in a form of sub-questions. Find out everything about writing a hypothesis.
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How to Use Hypotheses in a Dissertation?
It is significant to remember the following things when your dissertation contains hypotheses:
- Hypothesis cannot be the main question.
The main question is the research question. Do not confuse it with hypothesis. Hypotheses can be presented in a form of sub-questions.
- Preliminary research should be conducted.
When writing a hypothesis, you should understand that its task is state what you believe is true. Prior to stating anything, a research should be conducted. Pay attention to literature and problem statement.
- Conceptual framework should be created.
Your research should be used as the basis that helps to create a conceptual framework. Here you need to show what you need to find while conducting a real investigation.
- Form the hypotheses.
It is time for writing a hypothesis. You need to discuss each hypothesis in separate sections of your dissertation.
- It is important to test the selected hypotheses.
Test the hypotheses to find out whether your expectations are right. In case they are not right, you cannot verify your hypotheses.
It is important to create null and alternative hypotheses. They will assist you to facilitate the testing.
Below find samples of null H0 and alternative H1 hypotheses. They will help you to find out how to make a hypothesis
- H0: Sex and aggression has no relationship.
- H1: Sex and aggression are related.
- H0: Financial income does not influence on buying behavior.
- H1: Financial income has a direct influence on buying behavior.
- H0: Older and younger people have no differences in language.
- H1: Older and younger people have certain differences in language.
Dissertation experts say that both the null and research types of hypotheses should be tested against all possible outcomes so that only one is acceptable at the end of the process. This would mean rejecting the other. When all data is analyzed, you should be able to decide whether to accept the “alternative” hypothesis and reject (or not) the “null” hypothesis.
Finding Example Hypotheses
It is usual practice to test a number of different hypotheses in the course of completing a dissertation project. Much depends on the topic and discipline and the writer’s focus. One student, for instance, gave her dissertation the same title as her hypothesis, e.g., “Do Leadership Styles Differ at National, State, and Local Level among Those who Advocate on Behalf of Disabled People.” The independent variable in the student’s hypothesis concerned leadership and the dependent variable was those who advocate on behalf of disabled people. If you just look through a number of the dissertation titles published in any given year by a university or college, you should find plenty examples of different hypotheses and get ideas on ways to present these.