Uploaded by preethi bhopal

cohort and case control RESEARCH DESIGNS

advertisement
DESCRIPTIVE RESEARCH DESIGNS
Descriptive research aims to accurately and systematically describe a population,
situation or phenomenon. It can answer what, where, when and how questions, but
not why questions.
A descriptive research design can use a wide variety of research methods to
investigate one or more variables. Unlike in experimental research, the researcher
does not control or manipulate any of the variables, but only observes and measures
them.
Descriptive research methods
Descriptive research is usually defined as a type of quantitative research, though
qualitative research can also be used for descriptive purposes. The research
design should be carefully developed to ensure that the results are valid and reliable.
Surveys
Survey research allows you to gather large volumes of data that can be analyzed for
frequencies, averages and patterns. Common uses of surveys include:



Describing the demographics of a country or region
Gauging public opinion on political and social topics
Evaluating satisfaction with a company’s products or an organization’s services
Observations
Observations allow you to gather data on behaviours and phenomena without having
to rely on the honesty and accuracy of respondents. This method is often used by
psychological, social and market researchers to understand how people act in real-life
situations.
Observation of physical entities and phenomena is also an important part of research
in the natural sciences. Before you can develop testable hypotheses, models or
theories, it’s necessary to observe and systematically describe the subject under
investigation.
Case studies
A case study can be used to describe the characteristics of a specific subject (such as a
person, group, event or organization). Instead of gathering a large volume of data to
identify patterns across time or location, case studies gather detailed data to identify
the characteristics of a narrowly defined subject.
Rather than aiming to describe generalizable facts, case studies often focus on unusual
or interesting cases that challenge assumptions, add complexity, or reveal something
new about a research problem.
Advantages
1. Data collected from descriptive research is helpful in important decisionmaking because the data is obtained from a large population.
2. A variety of data can be obtained using different descriptive research methods
like surveys, observation, and vase study. These three research methods
provide different type of data which can be used to analysis for a research
problem.
3. It is cheap and quick .
4. Descriptive research provides both quantitative and qualitative data.
5. Descriptive research can be conducted in natural settings. There is no need to
have a designated space to conduct research using any of the descriptive
research methods.
Disadvantages
1. Descriptive methods only provide the answers for “what” and do not answer
the why and how. Therefore, descriptive research methods are not suitable for
determining cause and effect relationships.
2. Descriptive methods mainly depend on the responses of people. There are
chances that people might not act their true selves if they know they are being
observed. In the case of the survey method, there are chances that some people
don’t answer the questions honestly, which makes the output of the descriptive
research study invalid. Because the results derived from this type of data will
not be accurate.
3. Another problem associated with descriptive research is the halo effect. A
researcher might get partial if he knows the participant personally. The
observations made in this way would be considered invalid.
4. In descriptive research methods, participants are picked randomly. The
randomness of the sample can’t represent the whole population accurately.
Conclusion
The uniqueness of descriptive research partly lies in its ability to explore both
quantitative and qualitative research methods. Therefore, when conducting descriptive
research, researchers have the opportunity to use a wide variety of techniques that aids
the research process.
Descriptive research explores research problems in-depth, beyond the surface level
thereby giving a detailed description of the research subject. That way, it can aid
further research in the field, including other research methods.
It is also very useful in solving real-life problems in various fields of social science,
physical science, and education.
Download