Strength and weaknesses of a research study


LoBiondo-Wood, G., &amp Haber, J. (2014) argue that the strength andweaknesses of a research study can be determined through evaluationof reliability and validity of the methodology. According toAndermann, A. (2013), reliability is the ability of a study to yieldsame results when it is carried out repeatedly to the same object.There are two aspects of validity: whether variables are actuallymeasuring what the researcher wants to measure and the degree ofaccuracy of the measurement. This paper evaluates the strength andweaknesses of the two studies conducted by Sarna et al. (2014)and Kalisch, Xie &amp Ronis (2013): to determine the effectivenessof hospital based program on tobacco cessation intervention, andevaluate the impact of train-trainer intervention on nursing teamworkrespectively.

The research designs used in each study were suitable for each study.Sarna et al employed prospective design while Kalisch, Xie &ampRonis (2013) used quasi-experimental design. Prospective researchdesign enabled Sarna et al (2014) to make observation of thephenomenon from the cause to effect of the educational program(Gallin J. I. &amp Ognibene F. P. 2012). The accuracy of the datacollected is a weakness since the improvement of the frequency of thenurses’ intervention may be as a result of other factors. Theparticipation of nurses in the program may have been motivated bytheir interested in tobacco control and thus are likely to respondpositively. The sample sizes in both studies were small and thusmaking the data collected not reliable (Blaikie, N. W. H. 2010). Forexample, Kalisch, Xie &amp Ronis (2013) involved 9 nurses frommedical-surgical units in three different hospitals this number issmall in order to collect reliable data.

The strength of the study conducted by Sarna et al (2014)exists in the design used while weaknesses is evident in thereliability of the data collected, sample size, and other factor notaccounted but may have affected the outcome. Quasi-experimentaldesigned that Kalisch, Xie &amp Ronis (2013) used enable themaddress the issue of reliability. Another weakness of their studylies in the quasi-experimental design the researchers did not havefull control of the variables and thus unaccounted factors may haveaffected the outcome. Based on the above discussion, the two studiesare weak.


Andermann, A.(2013).&nbspEvidence for health: From patient choice to globalpolicy. Cambridge: Cambridge University Press, pp.125

Blaikie, N. W. H.(2010).&nbspDesigning social research: The logic of anticipation.Cambridge, UK: Polity Press, pp.185

Gallin J. I. &amp Ognibene F. P. (2012), Principles and Practiceof Clinical Research, Academic Press

Kalisch, B.J.,Xie, B. &amp Ronis, D.L. (2013). Train-the-trainer intervention toincrease nursing teamwork and decrease missed nursing care in acuteare patient units. Nursing Research, 62(6), 405-413. doi:10.1097/NNR.0b013e3182a7a15d

LoBiondo-Wood,G., &amp Haber, J. (2014).&nbspNursing research: Methods andcritical appraisal for evidence-based practice. Pp.307

Sarna et al.(2014). Impact of a smoking cessation educational program on nurses`interventions. Journal of Nursing Scholarship, 46(5),314-321