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The main threats to validity are bias, confounding and chance.
But keep in mind the internal and the external validity. Internal validity is the extent to which systematic error is minimised during the stages of data collection. where as the external validity encompasses the extent to which the results of the trials provide a correct basis for generalisation.
What else can I help you with?
What type of studies are epidemiological studies?
cohort
Types of epidemiological studies?
Lol wut
Who studies the relationship between organisms and the environment?
ecology, epidemiological studies
What are studies that reveal correlation between dietary habits and disease incidence referred to as?
epidemiological studies.
How internal validity of the correlational research can be increased?
By ruling out a series of threats to that validity. Please see the link for a list of them.
What are threats to external validity?
"A threat to external validity is an explanation of how you might be wrong in making a generalization."[4] Generally, generalizability is limited when the cause (i.e. the independent variable) depends on other factors; therefore, all threats to external validity interact with the independent variable.
What are some examples of threats to validity that could impact the results of this study?
Some examples of threats to validity that could impact the results of this study include selection bias, measurement error, confounding variables, and researcher bias.
What has the author Peizhong Peter Wang written?
Peizhong Peter Wang has written: 'Disability, epidemiological studies, and contextual factors'
What type of research studies population and is often used to search for correlation between dietary habits and disease incidence?
Epidemiological Study.
What has the author Elizabeth Jennifer Hanna written?
Elizabeth Jennifer Hanna has written: 'Epidemiological and genetic studies in congenital heart disease'
What are different research designs which help to establish cause and effect relationship in epidemiological studies?
Cohort, case control, and cross sectional
In nutrition research observations of the quantities and types of foods eaten by groups of people and the health status of those groups are known as?
epidemiological studies.
