associations, and/or relationship between
different variables or groups of respondents
under study.
• Ex-post facto / Causal Comparative – this kind of
research derives a conclusion from observations
and manifestations that already occurred in the
past and now compared to some dependent
variables. It discusses why and how a
phenomenon occurs.
• Comparative – it involves comparing and
contrasting two or more samples of study
subjects on one or more variables, often at a
single point of time. Specifically, this design is
used to compare two distinct groups on the basis
of selected attributes such as knowledge level,
perceptions, and attitudes, physical or
psychological symptoms.
Quantitative research is an objective, systematic empirical
investigation of observable phenomena through the use
of computational techniques. It highlights the numerical
analysisof data hoping that the numbers yield unbiased
results that can be generalized to some larger population
and explain a particular observation. Simply, quantitative
research is concerned with numbers and their
relationship with events.
Your goal in conducting a quantitative research study is to
determine the relationship between one thing (an
independent variable) and another (a dependent or
outcome variable) within a population. Quantitative
research designs are either descriptive (subjects usually
measured once) or experimental (subjects measured before
and after treatment). A descriptive study establishes only
associations between variables; an experimental study
establishes causality.
Its main characteristics are:
1. The data is usually gathered using structured research
instruments.
2. The results are based on larger sample sizes that are
representative of the population.
3. The research study can usually be replicated or repeated, given
its high reliability.
4. The researcher has a clearly defined research question to
which objective answers are sought.
5. All aspects of the study are carefully designed before data is
collected.
6. Data are in the form of numbers and statistics, often arranged
in tables, charts, figures, or other non-textual forms.
7. Project can be used to generalize concepts more widely,
predict future results, or investigate causal relationships.
8. The researcher uses tools, such as questionnaires or computer
software, to collect numerical data.
❖ Quantitative research makes you focus your mind on specific
things by means of statistics that involve the collection and study
of numerical data. Thus, to give the basic meaning of quantitative
research is to say that research is a way of making any
phenomenon or any sensory experience clearer or more meaningful
by gathering and examining facts and information about such
person, thing, place, or event appealing to your senses. You use
mathematical operations of addition, subtraction, division, and
multiplication to study and express relationships between quantities
or magnitudes shown by numbers or symbols. Involving
measurements and amounts, quantitative research seeks to find
answers to questions starting with how many, how much, how
long, to what extent, and the like. Answers to these questions
come in numerals, percentages, and fractions, among others.
(Suter 2012; Russell 2013)
Characteristics of Quantitative Research
❖ Since quantitative research uses numbers and figures to denote a
particular thing, this kind of research requires you to focus your
full attention on the object of your study. Doing this, you tend to
exclude your own thoughts and feelings about the subject or object.
This is why quantitative research is described as objective research
in contrast to qualitative research that is subjective. Characterized
by objectiveness, in which only the real or factual, not the
emotional or cognitive existence of the object matters greatly to the
artist, quantitative research is analogous to scientific or
experimental thinking. In this case, you just do not identify
problems but theorize, hypothesize, analyze, infer, and create as
well. Quantitative research usually happens in hard sciences
like physics, chemistry, biology, and medicine; qualitative
research, in soft sciences such as humanities, social sciences,
education, and psychology, among others.
Other characteristics of Quantitative Research are as follows:
1. OBJECTIVE. Quantitative research seeks
accurate measurement and analysis of target
concepts. It is not based on mere intuition and
guesses. Data are gathered before proposing a
conclusion or solution to a problem.
2. CLEARLY DEFINED RESEARCH
QUESTIONS. The researchers know in advance
what they are looking for. The research questions
are well-defined for which objective answers are
sought. All aspects of the study are carefully
designed before data are gathered.
3. STRUCTURED RESEARCH
INSTRUMENTS. Standardized instruments guide
data collection, thus, ensuring the accuracy,
reliability, and validity of data. Data are normally
gathered using structured research tools such as
questionnaires to collect measurable
characteristics of the population like age, socio-
economic status, number of children, among
others.
4. NUMERICAL DATA. Figures, tables, or graphs
showcase summarized data collection in order to
show trends, relationships, or differences among
variables. In sum, the charts and tables allow you
to see the evidence collected.
5. LARGE SAMPLE SIZES. To arrive at a more
reliable data analysis, a normal population
distribution curve is preferred. This requires a
large sample size, depending on how the
characteristics of the population vary. Random
sampling is recommended in determining the
sample size to avoid the researcher’s bias in
interpreting the results.
6. REPLICATION. Quantitative methods can be
repeated to verify findings in another setting thus
strengthen and reinforce the validity of findings
eliminating the possibility of spurious conclusions.
7. FUTURE OUTCOMES. By using complex
mathematical calculations and with the aid of
computers, if-then scenarios may be formulated
thus predicting future results. Quantitative research
puts emphasis on proof, rather than discovery.
Strengths and Weaknesse s
The strengths of quantitative research include the following:
1. It is objective. The most reliable and valid way of
concluding results, giving way to a new hypothesis,
or to disproving it.
2. The use of statistical techniques facilitates
sophisticated analyses and allows you to