Part 1
I read the
study Social Networking Sites: Their
Users and Social Implications — A Longitudinal Study (Brandtzæg 2012). The
study examines how social networking sites users differs from non-users in
terms of loneliness, informal sociability and bridging capital and how its
changes over time.
Which quantitative method or methods are used
in the paper? Which are the benefits and limitations of using these methods?
The study
uses a longitudinal method where its participants answered a questionnaire once
a year over a period of three years. The benefits from this is that you can
compare the results the over time. The limitations are that there was a huge amount of
dropouts (even though the study argues that the dropouts didn’t affect the
result). The questionnaire was Web based so you cannot be sure that the
participants took the study seriously and answered the questions truthfully and
thoroughly.
What did you learn about quantitative methods
from reading the paper?
When
developing the questionnaire the researchers uses a lot of references on how
the questions should be written. This gives the study a lot of weight and it
decreases the chances of asking irrelevant questions. The paper also shows how
difficult it is to avoid dropouts, especially when it is a longitudinal
research.
Which are the main methodological problems of
the study? How could the use of the quantitative method or methods have been
improved?
I think one
of the problems with the study is that the researcher defines what things like
bridging capital or loneliness means. For example the participants answers on a
grade from 1 (Never) to 4 (Always) on the statement “I have difficulties in
making friends”. If you answer “Always” on this statement that doesn’t have to imply
that you are lonely. The study never asks directly about what they are looking
for, for example questions like “Do you feel lonely?” are missing.
Part 2
The study
focuses on the relationship between physical activity, perceived stress and
self-reported upper respiratory tract infection (URTI) (Bälter et. al 2010). By
conducting a quantitative research, by letting the study group answer several
web-questionnaires, the conclusion was that people with a high level of
physical activity had a lower risk of URTI. Also that people with a high level
of perceived stress would lower their URTI if they increase their physical
activity. The study shows how difficult it can be to do a quantitative research
with a lot of participants, which is required if you want to draw any
generalizable conclusions. There is a lot of outer parameters and events that
happened during the study that could influence the result. What I particularly
reacted to, and also learned, when reading the study was how detailed the “Study
design” section was. They have written exactly how they have conducted their
study and it seems like they haven’t left out any events at all, for example
all participant dropouts where reported. I also reacted to how often they used
statistical methods when both reporting and analyzing their results, something
I will take with me when I’m conducting quantitative research in the future.
Which are the benefits and limitations of using
quantitative methods?
The benefits
of quantitative methods are that it collects data that is easy to summarize and
describe, most of the results will be in numbers that can be presented in for
example diagrams and tables. In a quantitative research you often use a large
amount of participants, which can be a bit tricky, but it also invites you to
draw more generalizable conclusions. The limitations is that it’s important
that you don’t develop a questionnaire with any bias, the researchers can get
the results they want by just asking the right questions. Also there is a
limitation with dropouts and that you cannot be sure if the participants
answers the questions truthfully and thoroughly. The conclusions are also very
dependent on which population you draw your participants from, to draw wide
conclusions you need a broad population.
Which are the benefits and limitations of using
qualitative methods?
Qualitiative
methods invite the participants to elaborate their thoughts and feelings so you
often get deeper results. With qualitative methods you also have the chance to
get results that you weren’t looking for, since the participants can speak more
freely and not answers direct questions (like yes/no). The limitations with
qualitative research is that it’s more time consuming and you cannot have a
larger number of participants, so the results is hard to generalize.
References
Brandtzæg, Petter
B. (2012) Social Networking Sites: Their Users and Social Implications — A
Longitudinal Study, Journal of Computer-Mediated Communication, Volume 17,
Issue 4, p. 467-488, July 2012.
Fondell,
E., Lagerros, Y. T., Sundberg, C. J., Lekander, M., Bälter, O., Rothman, K.,
& Bälter, K. (2010). Physical activity, stress, and self-reported upper
respiratory tract infection. Med Sci Sports Exerc, 43(2), 272-279.