If an experiment is to be useful, only one variable at a time can be manipulated intentionally this is the Blank 1 Question 2 .  If more than one variable is altered (changed), the results of an experiment won't be valid. The effect of the change made can be measured this will be the Blank 2 Question 2

In an experiment, the variable is measured, and the variable is manipulated.

In an experiment, the variable is expected to change as a result of the experimental manipulation.

In experimental research, the independent variable is manipulated or changed by the experimenter to measure the effect of this change on the dependent variable.  Group of answer choicesTrueFalse

When conducting a naturalistic observation, it is important that the researchers _____.Multiple choice question.manipulate at least one variablechange the situation that they are observingnot change the situation that they are observingmanipulate one and only one variable

In an experiment, which variable is manipulated by the experimenter?Multiple choice question.ControlIndependentDependentCorrelational