Description of a Quantitative Study to be utilized for a Research

Descriptionof a Quantitative Study to be utilized for a Research


Descriptionof a Quantitative Study to be utilized for a Research

Internaland external validity

Formany years, researchers and healthcare providers relate respiratorydiseases to air pollution. Typical symptoms ranging from a runnynose, sore throat to serious allergies and asthmatic conditions,chronic bronchitis are all linked to and can be worsened by airpollutants. Understanding what might trigger conditions such asasthmatic attacks can help victims keep their disease in check. Thisresearch will seek to establish a quantitative relationship betweenrespiratory illness prevalence and the level of air pollution. Thequantitative study will be an experimental study aligned to objectivemeasurement where data will be collected through questionnaires andsurveys. Moreover, the study will manipulate existing numericalinformation using computational or statistical procedures.

Internaland external validity

Internalvalidity denotes the magnitude to which a research`s results can beinferred accurately. These mainly refer to the steps that theresearch follows to attribute the intervention correctly. Externalvalidity, in contrast, denotes to the degree to which a studiesresult and conclusion will hold for other persons. This mainlyreflects how the conclusion of the survey will be generalized in reallife (Woolcock, 2013). An example is how air pollution impacts onrespiratory illness can also be justified in many other areas otherthan the urban areas.


Howdo air pollutants contribute to the risk of respiratory disease?

Sampleselection method

Theresearch will use a random sampling method to select the subjects forthe study. Random sampling will help to reduce sampling error

Factorsto affect internal validity of the research

Thegreatest threat to internal validity of the research is an existenceof extraneous factors that may allow alternative explanations on thecauses of respiratory illness such as biological, genetic factors,demographical factors and socio-economic factors that differ indifferent places. Similarly, history effect can also threateninternal validity on the events that may occur between pretest andposttest (Woolcock, 2013). Location effect also can alter a researchoutcome as well when the interventions analyzed occur in differentplaces.


Woolcock,M. (2013). Using case studies to explore the external validity ofcomplex development interventions.&nbspEvaluation,&nbsp19(3),229-248.