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The Research Hypothesis. Islamic university Nursing college. The Research Hypothesis. A hypothesis is a tentative prediction or explanation of the relationship between two or more variables.
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The Research Hypothesis Islamic university Nursing college
The Research Hypothesis • A hypothesis is a tentative prediction or explanation of the relationship between two or more variables. • A hypothesis translates the problem statement into a precise, unambiguous prediction of expected outcomes.
Example: the problem statement might ask: Does room temperature affect the optimal placement time of rectal temperature measurements in adults? -As a tentative solution to this problem, the research might predict the following: cooler room temp require longer placement times for rectal temp measurements in adults than warmer room temp.
Purposes of hypotheses:- • Through hypotheses theoretical propositions is supported, scientific knowledge is gained. Negative findings are sometimes as important as positive ones. • Hypotheses guide the research design and dictate the type of statistical analysis to be used with the data.
-Hypotheses provide the reader with an understanding of the researcher’s expectations about the study before data collection. • Characteristics of workable hypotheses • Statement of anticipated relationships • It must states the predicted relationship between 2 or more variables. • The prediction “ pregnant women who receive prenatal training will have favorable reactions to the labor and delivery experience”
Is not a scientifically acceptable hypothesis because this statement expresses no anticipated relationship. • If your hypothesis lacks a phrase such as “more than” “less than” greater than” “different from” “related to ” or some thing similar, you may need to reformulate your prediction.
2. Testability: • Example: Small group teaching will be better than individualized teaching for dietary compliance in diabetic pts. • Words such as should, ought, better and bad for are not scientifically testable.
3. Justifiability. • 4. Contains the population and variables. • 5. Reflects the problem statement: congruency in a must.
Classifications of hypotheses:- • Simple vs. complex hypotheses. • (univarite) ( multivariate) • Directional vs. Non- Directional hypotheses:- • - A directional hypothesis is one that specifies the expected direction of the relationship between variables.
That is , the researcher predicts not only the existence of a relationship, but also the nature (type) of the relationship. • A non- directional hypothesis: • Predicts that two or more variables are related but makes no projections about the exact nature of the association. • Deductive hypotheses derived from theory will almost always be directional.
3. Research vs. statistical hypotheses (null hypotheses) • Research hypotheses are statements of expected relationships between variables. • Null hypotheses state that there is no relationship between the independent variables and dependent variables. • The aim of the researcher is to reject the null hypothesis.
