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Advantages And Disadvantages Of Longitudinal Studies (And Smaller Questions)

843 words - 4 pages

Explain what is meant by the ‘snowball technique’ of sampling (Item B). [2 marks]
* Used when it is difficult to gain access to a particular group of people who are the subjects of a study, or when there is no sampling frame available. This method involves making contact with one member of the population who will be studied and then asking them to name one or more possible contacts.

Identify two types of quantitative research method. [4 marks]
* Surveys
* Case Studies

Identify one advantage and one disadvantage of selecting a non-representative sample. [4 marks]
* Advantage: Studying non-typical people can be more helpful to a study because they may help generate ...view middle of the document...

The main technique was a self-report questionnaire which was initially administered personally by researchers. The study relying on self-report methods present limitations. Participants may intentional lie, exaggerate the true or recall event they believe to be true which are not entirely. Also, these questionnaires being delivered by the researcher introduced the issue of the Hawthorne effect, as these questionnaires are being carried out face to face participants may alter their answers to avoid embarrassment as they are not given the option of anonymity, thus the study loses validity. On the opposing hand, the positives of this method are that questionnaires are a method often quick and cheap to carry out.

Another example of a longitudinal study is the study of Young People in England which began in 2004 and will continue to track the sample throughout their education and onwards. In 2004, students in year 9 were interviewed and completed a questionnaire regarding their views on education. The sample consisted on 15,000 young people and since then interviews have been carried out yearly. This study, this many longitudinal studies, has a large sample size which is a strength because it makes the study more generalizable or representative. Although, on the other hand, the study may lose a sum of its participants, known as sample attrition, so consequently a proportion of this generalizability/representativeness is lost. Participants are generally time-consuming to replace in the event of sample attrition, another limitation of this method. The views of those who...

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