Posted by **nik** on Sunday, May 10, 2009 at 1:43pm.

sorry i put my question in the wrong place. ok my question is can you tell me if i did this correctly. my experiment was about how can you tell if the person is lying by his body language. will my independent variable be when i interview a person on a dim light while i interview others on a normal light. then my dependent variable will be what happen or what change on the answers of all that was interviewed. the controlled variable willbe the questions to each person will be the same. is this right? because this is how i understand it. please help i really need the answer badly! thanks for all your help !!!!!

- science -
**SraJMcGin**, Sunday, May 10, 2009 at 3:29pm
If I understand what you are saying, here is what you are looking for.

Since the independent variable is what you manipulate (change) or control, it would be the light everyone is exposed to. There can only be one independent variable at a time. You could do 3 different experiments: bright light, average light, dim light (for example.)

The dependent variable depends upon the independent variable and will be what you observe and measure. In other words, it would be the response (how the body language changes) you get. You might get more than one dependent variable.

Sra

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