NameCourseProfessorMidterm ExamCross-sectional pack involves the observation of some subset of a population of items tout ensemble at the alike measure . Groups can be compared at different ages with respect to independent variables . This study differs from the longitudinal study because it takes place at a single point in snip . In a longitudinal study , the same observations are made over different periods usually spanning some(prenominal) years . This type of study looks into developments and trends across generations or bread and butter spans Cross-sectional studies can be used when a research worker has time constraints usually this method is done in expedition trips which look at a certain group in a matter of some(prenominal) weeks to months . One weakness of this turn up is that it does not encompass the changes over time This becomes the strength of the longitudinal method of study .
It can trace the development of a certain phenomenon or fad thru its infancy up until the time it disappears , one downside though is that it required a lot of time and effort to completeDown syndrome is caused by an abnormal cell division of the twenty-first chromosome . The problem occurs when there is extra genetic material from the verbalize chromosome and is responsible for the characteristic features and developmental problems of Down syndrome . Down syndrome has several symptoms or characteristics , most common of all are : shape facial features , protruding tongue , small head , upwardly slanting eyes which are unusual for the child s heathenish group , and unusually shaped ears . Down...If you want to get a full essay, order it on our website:
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