EXPERIMENTAL CONTROLS...
set of experimental conditions where
everything is identical, but one variable...
an experimental control is identical to an experimental
treatment
except for one critical factor being tested.
experimental treatments of the dependent
variables must be handled exactly alike...
length is measured with same
time interval, at same pH, temp, age, etc...
except for independent variable
(agent being manipulated - length over time).
there are 2 parallel
experiments measuring the dependent & independent
variables:
one is the EXPERIMENTAL
and one is the CONTROL
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