Related Experiment Video
Updated: Jun 26, 2026
08:50
How to Study Placebo Responses in Motion Sickness with a Rotation Chair Paradigm in Healthy Participants
Published on: December 14, 2014
Challenging received wisdom: antidepressants and the placebo effect
1Department of Psychology, University of Hull, Hull HU6 7RX, UK. i.kirsch@hull.ac.uk
Summary
A meta-analysis found antidepressant effects were not clinically significant for most patients, sparking debate. This article examines the reactions and critiques to the study
Area of Science:
- Psychiatry and Clinical Psychology
- Medical Research Methodology
Background:
- Antidepressant medications are widely prescribed for mood disorders.
- The clinical significance of antidepressant efficacy compared to placebo is a subject of ongoing debate.
- A specific meta-analysis challenged conventional understanding of antidepressant effectiveness.
Purpose of the Study:
- To explore and analyze the public and scientific reactions to a controversial meta-analysis on antidepressant efficacy.
- To address and counter criticisms leveled against the meta-analysis and its findings.
- To provide a balanced perspective on the clinical significance of antidepressants.
Main Methods:
- Review and analysis of media coverage and scientific commentary following the publication of the meta-analysis.
- Examination of criticisms regarding the methodology and conclusions of the meta-analysis.
- Systematic evaluation of the evidence presented in the meta-analysis.
Main Results:
- The meta-analysis indicated a lack of clinically significant difference between antidepressants and placebo for the majority of patients.
- Reactions included denial of the findings and critiques of the analyzed clinical trials.
- The study explores and refutes common criticisms and points of contention.
Conclusions:
- The debate highlights the complexities in interpreting clinical trial data and the impact of media dissemination.
- Further research and transparent reporting of antidepressant trial outcomes are warranted.
- Understanding the nuances of antidepressant efficacy is crucial for clinical practice and patient care.
Related Concept Videos
01:54The Placebo Effect
The placebo effect occurs when people's expectations or beliefs influence or determine their experience in a given situation. In other words, simply expecting something to happen can actually make it happen.
02:07Blind Procedures
Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which child was...
01:23Antidepressant Drugs: MAOIs and Other Agents
Atypical antidepressants, including bupropion (Wellbutrin), mirtazapine (Remeron), nefazodone (Serzone), trazodone (Desyrel), and vilazodone (Viibryd), offer unique mechanisms of action. Bupropion weakly inhibits dopamine and norepinephrine reuptake, aiding depression treatment and smoking cessation, with a low risk of sexual dysfunction. Mirtazapine enhances serotonin and norepinephrine neurotransmission, leading to sedation, increased appetite, and weight gain. As a result, it helps treat...
01:11Blinding
Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.
01:28Drug Therapy
The advent of drug therapy has profoundly shaped modern mental health care, providing targeted treatments for a range of psychological disorders. Psychotherapeutic drugs, classified into antianxiety, antidepressant, and antipsychotic medications, address symptoms across anxiety disorders, mood disorders, and schizophrenia. While these medications have transformed patient outcomes, they require careful management due to their potential side effects and limitations.
Antianxiety Medications
Antianxiety Medications
01:28Antidepressant Drugs: Tricyclics, SSRIs, and SNRIs
Tricyclic Antidepressants (TCAs), including Desipramine (Norpramin), Imipramine (Tofranil), Clomipramine (Anafranil), and Amitriptyline (Elavil), inhibit serotonin and norepinephrine reuptake and also block other receptors. They are used for depression, pain conditions, and insomnia. Common adverse effects include anticholinergic effects, sedation, orthostatic hypotension, and weight gain. They have a narrow therapeutic window and so require plasma-level monitoring. Abrupt discontinuation can...