What are the 3 kinds of variables and describe each?

Question

it is the dependent,independent,and controlled variables...

and how do you describe the three???

Answer 1

Dependant variable: The outcome of the expirement for eg if you were investigating how high a certain plant grew in certain conditions then the height of the plant would be the dependant variable

Independant variable: What you change so in the previous example it would be the amount of light it got, amount of water, soil type or other to do with the conditions

Conrolled variables: Are just the variables that you control so they dont change

Answer 2

LOL! Oh, Jonquill, someday you'll learn about actually answering questions instead of tearing others down... and the fact that I'm actually trying to learn the truth of the matter has no bearing to those who remain skeptical in the face of data which has not proved to be either true or false (with a very typical claim of the pseudo-skeptics being that it's all obviously false because it's a superstition... like photography).

To actually answer this question:

The three you're describing are typically used in scientific experimentation, in order to reduce (or at least account for) bias and generate empirical data.

Independent variables are variables that change because an experimenter changes the conditions, or observes a change in those conditions.

Dependent variables change as independent variables change. They "depend" on the circumstances.

Control variables are deliberately unchanged (or prevented from changing) and are used to deduce what conditions are actually necessary for a given result.

In using these three, allow me to add that in the "nutty" sciences (as Jonquill so eloquently put it) such as psychology, sociology, and parapsychology, empirical data doesn't always result from experimentation, especially where the causal relationship between the result and its triggering events is misunderstood or not understood. This was the overall issue with radiation in the 1800's with Mme. Curie, whose efforts over many years finally "proved" that it existed.

In 15 years of investigating the paranormal, I have never been able to derive any method that obtains consistent results, though inconsistent results seem to arrive consistently under certain conditions (which most real investigators are trying to correlate enough to arrive at a conclusion for). In order to be able to obtain a consistent result, a consistent method of communication to a consistent type of ghost would have to be obtained. Because such a method doesn't exist, consistent results cannot be readily obtained.

People who want physical proof of the nonphysical are typically missing out on an entire sphere of knowledge. This doesn't mean that empirical evidence cannot be obtained, but rather must be collateral in nature (its effects may be measured, while it may not itself be measurable or detectable... as with radiation, subatomic particles, cosmic rays, etc.). This leads skeptics to dismiss any data (data that isn't largely accepted by the scientific community as valid) to invalidate claims of any kind which may be nonphysical in nature.

Experiments with good design (design which accounts for all dependent, independent, control, and uncontrollable factors) will universally need to be repeatable, duplicated by others to validate the methodology and address any errors therein, and obtain consistent results. Because ghosts, UFO's, and people don't always respond in a predictable way, it's difficult to have good design in experimentation where there can be no control over the effect itself.

Hope this helps. I've included Wikipedia links in order to help you further your study of these kinds of variables.

Answer 3

Hey, look ummm, just quietly you have posted into the nutty area of the science section, sometimes you may get lucky and a scientist may come sauntering by, or they may not, so you would be better of posting your question in the real science section.