<span>Experiments</span>
An experimental research entails a
controlled test of a cause-and-effect relationship that researchers suspect
exists. Experiments involve a researcher directly controlling or manipulating
changes in the independent variable by exposing participants to the treatment
conditions. It is undertaken to make a discovery or test a hypothesis
The common law system is based on tradition, precedent and custom.
The Chinese found out that they could use coal to heat things and make steel.
Intelligence tests
..........................
