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The feature of experimental research that most differentiates it from other types of quantitative research is its

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The feature of experimental research that most differentiates it from other types of quantitative research is its
incorporation of multiple dependent variables into the research design.
incorporation of multiple independent variables into the research design.
manipulation of the independent variable.
random selection of research participants from a defined population.

 
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Random assignment of research participants to experimental and control groups guarantees that

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Random assignment of research participants to experimental and control groups guarantees that

the experimental and control groups are equivalent in all respects.
there is no systematic bias in the assignment of the participants to the two groups.
the experimental and control groups will have approximately the same mean scores on the posttests.
the experimental and control groups will have approximately the same mean scores on the pretests.

 
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The main difference between manipulation of an independent variable and observation of naturally occurring variations in an independent variable is that naturally occurring variations provide more persuasive evidence of a causal relationship involving the independent variable. manipulation provides more persuasive evidence of a causal relationship involving the independent variable. manipulation is typically done in artificial laboratory settings, whereas observation of naturally occurring variations can be done in schools. manipulation requires the involvement of fewer research participants than observation of naturally occurring variations.

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the main difference between manipulation of an independent variable and observation of naturally occurring variations in an independent variable is that
naturally occurring variations provide more persuasive evidence of a causal relationship involving the independent variable.
manipulation provides more persuasive evidence of a causal relationship involving the
independent variable.
manipulation is typically done in artificial laboratory settings, whereas observation of naturally occurring variations can be done in schools.
manipulation requires the involvement of fewer research participants than observation of naturally occurring variations.t
naturally occurring variations provide more persuasive evidence of a causal relationship involving the independent variable.
manipulation provides more persuasive evidence of a causal relationship involving the
independent variable.
manipulation is typically done in artificial laboratory settings, whereas observation of naturally occurring variations can be done in schools.
manipulation requires the involvement of fewer research participants than observation of naturally occurring variations.

 
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what are the strengths and weaknesses of evolutionary psychology ?

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what are the strengths and weaknesses of evolutionary psychology ?

 
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