Control Group in Research
In an experimental study, a control group consists of participants who do not receive the experimental treatment or manipulation. This group serves as a baseline to compare against the experimental group, allowing researchers to determine if the treatment was effective. In clinical research, if a treatment is found to be beneficial, the ethical principle of seeking justice dictates that participants in the control group should be offered the treatment after the study concludes to ensure fair distribution of benefits.
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Related
Within-Group Design
External Validity
Analog Research
Independent Variable
Dependent Variable
Experimental Group in Research
Control Group in Research
Between-Subjects Experiment
Internal Validity
Control Group in Research
Tuskegee Syphilis Study
In the context of scientific research, what does the moral principle of seeking justice primarily require?
A researcher developing a new cognitive-behavioral intervention recruits participants exclusively from a psychiatric inpatient facility because they are readily available, even though the resulting treatment is intended for use with the general outpatient population. This practice raises ethical concerns because the risks of participation fall disproportionately on a vulnerable, institutionalized group that is unlikely to be the primary beneficiary of the research outcomes.
The principle of seeking justice in research requires that both the risks and benefits of scientific inquiry be distributed fairly. Match each research practice to the specific aspect of the justice principle it applies.
Analyze the following stages of a hypothetical research project. Arrange the steps to correctly illustrate the chronological and logical progression of a violation of the principle of seeking justice at the societal level.
What does the moral principle of seeking justice specifically demand at the societal level of research?
The ethical principle of seeking justice in research operates at multiple levels and is grounded in key historical documents. Match each term to its correct description.
When evaluating a research design to ensure it adheres to the principle of justice, a reviewer must confirm that there is an _____ distribution of both the risks and the benefits of the study across all social groups.
A clinical psychology researcher recruits participants exclusively from a psychiatric inpatient hospital because they are easily accessible, even though the resulting treatment is designed to be marketed as an expensive therapy for wealthy outpatients. According to the Belmont Report, this research design complies with the societal level of seeking justice because the inpatient participants receive free therapy during the trial.
An ethical evaluation of a drug trial reveals that after the study ended, the researchers did not offer the successful therapeutic drug to the participants who received a placebo. This is a direct violation of the principle of seeking justice on an individual level, which requires researchers to offer effective treatments to _____ groups at the study's conclusion.
An ethics board is evaluating a proposed longitudinal study on a new therapy. Order the steps the board must take to evaluate the study's compliance with the principle of seeking justice, starting from pre-recruitment societal concerns to post-study individual requirements.
Learn After
A researcher wants to test if a new 'mind-mapping' study technique improves exam scores. They recruit 50 students, have them all use the mind-mapping technique for one week, and then measure their scores on a final exam. The researcher concludes that since the average score was 85%, the technique is effective. What is the most significant flaw in this research design?
Eysenck's 1952 Psychotherapy Effectiveness Study
What is the primary purpose of a control group in an experimental study?
Because they serve as a baseline for comparison, participants in a clinical control group should not be offered the experimental treatment, even after the study has concluded and the treatment is found to be highly beneficial.
A researcher conducts a study to determine if a new 'Focus Meditation' audio track improves exam performance. She assigns half the students to listen to the meditation (Group A) and the other half to listen to unrelated nature sounds (Group B). After finding that Group A scored significantly higher, she provides the meditation track to Group B. Match the elements of this study to the conceptual roles they fulfill.
A researcher is testing a new relaxation technique to reduce stress. Arrange the steps of the research process in the correct logical order to demonstrate how a control group allows for the analysis of the technique's effectiveness and ensures ethical fairness.
Match each term related to experimental design and ethics with its correct definition based on the concept of a control group.
In a psychological study testing a new intervention, which of the following best describes the scientific function of the control group and the ethical obligation that follows if the study is successful?
When evaluating whether a researcher has treated participants fairly after a successful clinical trial, a key criterion is whether the beneficial intervention was eventually offered to the _____ group.
A researcher tests whether a mindfulness smartphone app reduces test anxiety. Participants in Group A use the app for 8 weeks, while participants in Group B continue their normal routines without any mindfulness practice. After the study, Group A showed significantly lower anxiety than Group B. In this experiment, Group A is the control group because its outcomes serve as the standard against which Group B's results are measured.
A key analytical advantage of including a control group is that both the experimental and control participants are equally exposed to background threats such as history, maturation, and repeated testing over the course of a study. Because these threats affect both groups equally, any meaningful difference in outcomes between the two groups can more confidently be attributed to the _____ rather than to these confounding factors.
A researcher has completed a clinical study testing a new psychotherapy for social anxiety and must now evaluate both the scientific quality of the design and whether all ethical obligations were fulfilled. Arrange the following evaluative steps in the correct logical order.