the research hypothesis
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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. - PowerPoint PPT PresentationTRANSCRIPT
• 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:-
1. Through hypotheses theoretical propositions
is supported, scientific knowledge is gained.
Negative findings are sometimes as important as
positive ones.
2. 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
1. 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.
• 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.
• 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.
• 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.