Examlex
When vitamin K functions in a variety of enzymatic reactions, what is added to molecules as a result?
Schizophrenia
A serious mental illness marked by altered cognition, feelings, communication, self-identity, and actions.
Natural Experiments
Observational study designs where the researcher does not control the exposure but can study its effects due to external factors acting as an "experiment."
Internal Validity
The degree to which a study or experiment accurately demonstrates a causal relationship between the variables being tested, without the influence of external factors.
External Validity
The extent to which the findings of a study can be generalized to other settings, populations, or time periods.
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