Experiments: Identifying Variables and Groups Instructions: In each of the scena

Question

Experiments: Identifying Variables and Groups Instructions: In each of the scenarios, identify the independent variable and dependent variable as well as which participant in the study make up the experimental and control groups Don't Forget: Indenendent Yariable-what the researcher manipulates; the particular treatment or condition the researcher is most interested in the effects of Dspsndent Variable-what is measured or observed; the "data" collected in the experiment Experimental Groun-those participants exposed to the independent variable Contrel 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 compared 1. Of 100 individuals with moderate depression, 50 receive 8 weeks of a new cognitive- behavioral therapy, while the other 50 are placed on a waiting list for 8 weeks. At the end of the 8 weeks all 100 are given psychological tests to assess their level of depression. Independent Variable: Dependent Variable_ Experimental Group Control Group: 2. A biopsychologist is studying the effects of anabolic steroids on the aggressive behavior of female rats. Twenty-four (24) rats receive daily injections of a placebo (fake drug), clock videotapes of the communal cages of all rats allow all aggressive encounters to be counted and timed. while twenty-four (24) othe receive daily injections of the steroid. Round-the- ariable: Dependent Variable: Experimental Group: Control Group: 3. An industrial psychologist is interested in whether lowering the temperature in a equivalent packing rooms participate in the study. One room is maintained at the other room is left at the usual company temperature of 76 degrees Independent Variable: room will increase productivity (number of products packed). Workers in two 65 degrees, Dependent Variable: Control Group: Experimental Group: Name: Date: Ashley Griffin, Howard Uaiversty, 2007 Adapted and Revised, D. Thompson, Capstone Institute, 2007

Explanation / Answer

1. The independent variable here is: New cognitive behavioural therapy.

The dependent variable: Moderate depression.

Experimental group: Group of 50 participants who received 8 weeks of cognitive behavioural therapy.

Control group: Group of 50 participants on a waiting list for 8 weeks.

The experimenter conducted the research to observe the cause and effect relationship between the independent variable and the dependent variable, ie, observing the effect of cognitive behavioural therapy on individuals with moderate depression. The experimenter in the above research randomly assigned 100 participants to two groups; experimental group and the control group. The experimental group was exposed to the intervention, whereas the control group was not provided with any intervention. The results of the experiment would suggest, whether did the CBT have any effect on the individuals with moderate depression in comparison to individuals who did not receive the therapy.

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