Experimental Design Worksheet - Weebly
Name_________________________Experiments: Identifying Variables and Groups 1Identify the independent variable and dependent variable as well as which participants make up the experimental group and which make up the control groupRemember:Independent Variable: What the investigator manipulates; the particular treatment or condition the investigator is most interested in the effects ofDependent Variable: What is measured or observed; the “data” collected in the experimentExperimental Group: those participants exposed to the independent variableControl Group: those participants treated just like the experimental group EXCEPT they are not exposed to the independent variable; the group with which the experimental group can be comparedOperational Definition: clear definition of what is being measured in an experiment (allows replication)A biopsychologist is studying the effects of anabolic steroids on the aggressive behavior of female rats. 24 female rats receive daily injections of a placebo (fake drug), while 24 others receive daily injections of the steroid. Round the clock videotapes of the communal cages of all rats allow all aggressive encounters to be counted and timed.Sample________________________Independent Variable________________________Dependent Variable_________________________Experimental Group_________________________Control Group______________________________Possible Operational Definitions:Here is your opportunity to describe an experiment of your own creation:I would like to investigate the effects of __________________________on this behavior: ___________________________.Half my participants would_______________________ while the others would ________________________Sample: _________________________________Independent Variable____________________________ Dependent Variable__________________________Experimental Group_____________________________ Control Group______________________________Possible operational definitions:Name_________________________Experiments: Identifying Variables and Groups 2Identify the independent variable and dependent variable as well as which participants make up the experimental group and which make up the control groupRemember:Independent Variable: What the investigator manipulates; the particular treatment or condition the investigator is most interested in the effects ofDependent Variable: What is measured or observed; the “data” collected in the experimentExperimental Group: those participants exposed to the independent variableControl Group: those participants treated just like the experimental group EXCEPT they are not exposed to the independent variable; the group with which the experimental group can be comparedOperational Definition: clear definition of what is being measured in an experiment (allows replication)Big Pharma Drug Company is conducting research of their new drug Attendomax to improve note taking behavior of college students diagnosed with Attention Deficit Hyperactivity Disorder. Fifty of the students receive capsules containing Attendomax, another fifty receive capsules which look the same but actually contain a placebo. All students attend the same series of lectures and have their notes collected afterwards. Notes are scored for completeness and accuracy.Sample________________________Independent Variable________________________Dependent Variable_________________________Experimental Group_________________________Control Group______________________________Possible Operational Definitions:Here is your opportunity to describe an experiment of your own creation:I would like to investigate the effects of __________________________on this behavior: ___________________________.Half my participants would_______________________ while the others would ________________________Sample: _________________________________Independent Variable____________________________ Dependent Variable__________________________Experimental Group_____________________________ Control Group______________________________Possible operational definitions: ................
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