What is the manipulated, controlled, and responding variable?
* Controlled remains fixed. * Manipulated is what you changed and recorded. * Responding is the resulting effect which you also record. For example: * Control group is the one that will receive the placebo, or will not be changed at all. * Manipulated is the group that is given the medicine being tested, or changing the “weight” of the object from 5 to 10 to test the result, or changing the “time” plants are exposed to light from 8 hours to 24 hours, etc. * Responding is the factor that changes “in response” to what you manipulated. So if you gave medicine (manipulated) to apnea patients, the “amount” or “quality of sleep” that changed (responding). [the “control” group would either receive no medicine or might receive a placebo.] Or if you exposed a plant to different “hours of light” (manipulated) then the “height” of the plant (responding) might show the difference in effect, etc.
