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Blinding

Blinding

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.

Randomized Experiments

Randomized Experiments

The randomization process involves assigning study participants randomly to experimental or control groups based on their probability of being equally assigned. Randomization is meant to eliminate selection bias and balance known and unknown confounding factors so that the control group is similar to the treatment group as much as possible. A computer program and a random number generator can be used to assign participants to groups in a way that minimizes bias.
Simple randomization
Simple...

The Scientific Method

The Scientific Method

Research is what makes the difference between facts and opinions. Facts are observable realities, and opinions are personal judgments, conclusions, or attitudes that may or may not be accurate. In the scientific community, facts can be established only using evidence collected through empirical research.

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Related Experiment Video

Updated: Sep 13, 2025

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Treating Racial Trauma: The Methodology of a Randomized Controlled Trial of the Healing Racial Trauma Protocol.

Muna Osman¹, Sophia Gran-Ruaz¹, Lucia Rios Maia da Silva¹

¹School of Psychology, University of Ottawa, Ottawa, ON K1N 6N5, Canada.

Behavioral Sciences (Basel, Switzerland)

|July 29, 2025

Summary

Racial trauma significantly impacts health and functioning. A new protocol, the Healing Racial Trauma Protocol (HRTP), shows promise in clinical trials for treating racial trauma and depression.

Keywords:

clinical trial racial trauma racialized racism randomized controlled trial

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Area of Science:

Psychology
Public Health
Clinical Psychology

Background:

Cumulative racism causes stress and trauma, impacting psychological, social, and physical health.
Racial trauma is often comorbid with other mental health conditions, complicating treatment.
Many clinicians lack training in identifying and treating racial trauma, highlighting an urgent need for effective interventions.

Purpose of the Study:

To explore methodological considerations for a randomized controlled trial (RCT) of the Healing Racial Trauma Protocol (HRTP).
To compare the efficacy of HRTP against treatment as usual in reducing racial trauma and depression symptoms.
To assess improvements in functioning for racialized individuals experiencing racial trauma.

Main Methods:

The study proposes a randomized controlled trial (RCT) design.
The HRTP will be compared to a control condition of treatment as usual.
Ethical, pragmatic, and methodological factors in trial design, population, and treatment will be examined.

Main Results:

The Healing Racial Trauma Protocol (HRTP) demonstrates significant promise for treating racial trauma.
The proposed RCT aims to provide empirical evidence for HRTP's efficacy.
Reduced severity of racial trauma and depression symptoms, alongside improved functioning, are anticipated outcomes.

Conclusions:

There is an urgent need for culturally safe and effective treatments for racial trauma.
The HRTP offers a promising novel intervention for individuals impacted by racism.
Methodological considerations are crucial for designing rigorous trials to evaluate such interventions.