methodology articles
What is the primary function of a control group in research?
What major issue arises when an experiment lacks a proper control group?
Which confounding variable relates to biological or psychological changes that occur naturally over time?
What is the specific purpose of using a Placebo Control group in research?
In which scenario is an Active Control group comparison most scientifically rigorous?
The principle of 'Dose Equivalence' in control design primarily requires what?
What statistical phenomenon causes participants with extremely low pre-test scores to likely score closer to the average on a subsequent test, regardless of intervention?
What is the fundamental concept established when an experimental group's outcome differs significantly from the control group?
How does an Active Control group help mitigate the Hawthorne effect?
What do control groups prevent when a city implements a new, expensive after-school tutoring program without one?
What is the definition of sampling bias?
How does sampling bias differ fundamentally from random error?
What immediate effect might result from a clinical trial sampling only young, healthy participants?
Which selection problem occurs when individuals decide whether or not to participate, often amplifying extreme views?
What is the primary danger associated with Convenience Sampling?
What error is exemplified by studying only currently successful companies to derive business lessons?
If a census uses outdated property tax records as its selection list, what type of error is introduced?
What challenge does Non-Response Bias present, even if the initial random selection was perfect?
What is considered the theoretical gold standard for avoiding sampling bias?
What is the first step in Stratified Random Sampling?