the main findings and conclusions and recommendations
(Conkin Dale, 2005). From the abstract the reader should
be able to determine if the study is of interest and whether
or not to continue reading (Parahoo, 2006).
Elements influencing robustness
Purpose of the study/research problem
A research problem is often first presented to the reader in
the introduction to the study (Bassett and Bassett, 2003).
Depending on what is to be investigated some authors will
refer to it as the purpose of the study. In either case the
statement should at least broadly indicate to the reader what
is to be studied (Polit and Beck, 2006). Broad problems are
often multi-faceted and will need to become narrower and
more focused before they can be researched. In this the
literature review can play a major role (Parahoo, 2006).
Logical consistency
A research study needs to follow the steps in the process in a
logical manner. There should also be a clear link between the
steps beginning with the purpose of the study and following
through the literature review, the theoretical framework, the
research question, the methodology section, the data analysis,
and the findings (Ryan-Wenger, 1992).
Literature review
The primary purpose of the literature review is to define
or develop the research question while also identifying
an appropriate method of data collection (Burns and
Grove, 1997). It should also help to identify any gaps in
the literature relating to the problem and to suggest how
those gaps might be filled. The literature review should
demonstrate an appropriate depth and breadth of reading
around the topic in question. The majority of studies
included should be of recent origin and ideally less than
five years old. However, there may be exceptions to this,
for example, in areas where there is a lack of research, or a
seminal or all-important piece of work that is still relevant to
current practice. It is important also that the review should
include some historical as well as contemporary material
in order to put the subject being studied into context. The
depth of coverage will depend on the nature of the subject,
for example, for a subject with a vast range of literature then
the review will need to concentrate on a very specific area
(Carnwell, 1997). Another important consideration is the
type and source of literature presented. Primary empirical
data from the original source is more favourable than a
secondary source or anecdotal information where the
author relies on personal evidence or opinion that is not
founded on research.
A good review usually begins with an introduction which
identifies the key words used to conduct the search and
information about which databases were used. The themes
that emerged from the literature should then be presented
and discussed (Carnwell, 1997). In presenting previous
work it is important that the data is reviewed critically,
highlighting both the strengths and limitations of the study.
It should also be compared and contrasted with the findings
of other studies (Burns and Grove, 1997).
Theoretical framework
Following the identification of the research problem
and the review of the literature the researcher should
present the theoretical framework (Bassett and Bassett,
2003). Theoretical frameworks are a concept that novice
and experienced researchers find confusing. It is initially
important to note that not all research studies use a defined
theoretical framework (Robson, 2002). A theoretical
framework can be a conceptual model that is used as a
guide for the study (Conkin Dale, 2005) or themes from
the literature that are conceptually mapped and used to set
boundaries for the research (Miles and Huberman, 1994).
A sound framework also identifies the various concepts
being studied and the relationship between those concepts
(Burns and Grove, 1997). Such relationships should have
been identified in the literature. The research study should
then build on this theory through empirical observation.
Some theoretical frameworks may include a hypothesis.
Theoretical frameworks tend to be better developed in
experimental and quasi-experimental studies and often
poorly developed or non-existent in descriptive studies
(Burns and Grove, 1999). The theoretical framework should
be clearly identified and explained to the reader.
Aims and objectives/research question/
research hypothesis
The purpose of the aims and objectives of a study, the research
question and the research hypothesis is to form a link between
the initially stated purpose of the study or research problem
and how the study will be undertaken (Burns and Grove,
1999). They should be clearly stated and be congruent with
the data presented in the literature review. The use of these
items is dependent on the type of research being performed.
Some descriptive studies may not identify any of these items
but simply refer to the purpose of the study or the research
problem, others will include either aims and objectives or
research questions (Burns and Grove, 1999). Correlational
designs, study the relationships that exist between two or
more variables and accordingly use either a research question
or hypothesis. Experimental and quasi-experimental studies
should clearly state a hypothesis identifying the variables to
be manipulated, the population that is being studied and the
predicted outcome (Burns and Grove, 1999).
Sample and sample size
The degree to which a sample reflects the population it
was drawn from is known as representativeness and in
quantitative research this is a decisive factor in determining
the adequacy of a study (Polit and Beck, 2006). In order
to select a sample that is likely to be representative and
thus identify findings that are probably generalizable to
the target population a probability sample should be used
(Parahoo, 2006). The size of the sample is also important in
quantitative research as small samples are at risk of being
overly representative of small subgroups within the target
population. For example, if, in a sample of general nurses, it
was noticed that 40% of the respondents were males, then
males would appear to be over represented in the sample,
thereby creating a sampling error. The risk of sampling
660 British Journal of Nursing, 2007, Vol 16, No 11

Quantitative Research Methodology: Assignment

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