Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Randomized Experiments01:13

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...
Blinding01:11

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.
Controls in Experiments01:13

Controls in Experiments

When conducting an experiment, it is crucial to have control to reduce bias and accurately measure the dependent variables. It also marks the results more reliable. Controls are elements in an experiment that have the same characteristics as the treatment groups but are not affected by the independent variable. By sorting these data into control and experimental conditions, the relationship between the dependent and independent variables can be drawn. A randomized experiment always includes a...
What is an Experiment?01:12

What is an Experiment?

An experiment is a planned activity carried out under controlled conditions. The purpose of an experiment is to investigate the relationship between two variables. When one variable causes change in another, we call the first variable the explanatory or independent variable. The affected variable is called the response or dependent variable. In a randomized experiment, the researcher manipulates values of the explanatory variable and measures the resulting changes in the response variable. The...
Clinical Trials01:16

Clinical Trials

Clinical trials are prospective experimental studies conducted on humans to determine the safety and efficacy of treatments, drugs, diet methods, and medical devices. Using statistics in clinical trials enables researchers to derive reasonable and accurate conclusions from the collected data, allowing them to make wise decisions in uncertain situations. In medical research, statistical methods are crucial for preventing errors and bias.
There are four phases in a clinical trial. A phase one...
Group Design02:01

Group Design

The most basic experimental design involves two groups: the experimental group and the control group. The two groups are designed to be the same except for one difference— experimental manipulation. The experimental group gets the experimental manipulation—that is, the treatment or variable being tested—and the control group does not. Since experimental manipulation is the only difference between the experimental and control groups, we can be sure that any differences between the two are due to...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

The use of actigraphy to objectively define motion and function before and after shoulder arthroplasty.

Journal of orthopaedics·2024
Same author

Compression for preventing recurrence of venous ulcers.

The Cochrane database of systematic reviews·2024
Same author

Structural Evolution of Ultrathin SrFeO<sub>3-δ</sub> Films during Oxygen Evolution Reaction Revealed by <i>In Situ</i> Electrochemical Stress Measurements.

ACS applied energy materials·2023
Same author

Exploring support, experiences and needs of older women and health professionals to inform a self-management package for urinary incontinence: a qualitative study.

BMJ open·2023
Same author

Dementia care in the age of COVID-19: Community resources for nurses.

Nursing·2022
Same author

Development of a core outcome set for venous leg ulceration (CoreVen) research evaluations (protocol).

Journal of tissue viability·2021
Same journal

Access to adolescent mental healthcare in rural communities can be improved through community leadership, education and cooperation.

Evidence-based nursing·2026
Same journal

Antenatal care barriers differ fundamentally between high-resource and low-resource settings: a call for context-sensitive nursing strategies.

Evidence-based nursing·2026
Same journal

Cultural sensitivity and emotional resilience education improve infant health and wellbeing in end-of-life care in neonatal intensive care units.

Evidence-based nursing·2026
Same journal

Patients and family caregivers value feeling seen, heard and humanly connected in end-of-life conversations with nursing staff.

Evidence-based nursing·2026
Same journal

Postnatal cervical screening at 6 weeks offers an opportunity to improve uptake, but timing should remain flexible.

Evidence-based nursing·2026
Same journal

Educators need to equip nursing students with the skills, knowledge and confidence to use generative AI effectively.

Evidence-based nursing·2026
See all related articles

Related Experiment Video

Updated: May 29, 2026

Randomized Controlled Trial to Study the Acute Effects of Strength Exercise on Insulin Sensitivity in Obese Adults
06:13

Randomized Controlled Trial to Study the Acute Effects of Strength Exercise on Insulin Sensitivity in Obese Adults

Published on: December 1, 2023

What is a randomised controlled trial?

Andrea Nelson

    Evidence-Based Nursing
    |September 23, 2011
    PubMed
    Summary

    No abstract available in PubMed .

    More Related Videos

    A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
    04:53

    A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition

    Published on: September 20, 2019

    Randomized, Triple-Blind, and Parallel-Controlled Trial of Transcranial Direct Current Stimulation for Cognitive Rehabilitation after Stroke
    08:53

    Randomized, Triple-Blind, and Parallel-Controlled Trial of Transcranial Direct Current Stimulation for Cognitive Rehabilitation after Stroke

    Published on: June 6, 2025

    Related Experiment Videos

    Last Updated: May 29, 2026

    Randomized Controlled Trial to Study the Acute Effects of Strength Exercise on Insulin Sensitivity in Obese Adults
    06:13

    Randomized Controlled Trial to Study the Acute Effects of Strength Exercise on Insulin Sensitivity in Obese Adults

    Published on: December 1, 2023

    A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition
    04:53

    A Clinical Trial Assessing the Safety, Efficacy, and Delivery of Olive-Oil-Based Three-Chamber Bags for Parenteral Nutrition

    Published on: September 20, 2019

    Randomized, Triple-Blind, and Parallel-Controlled Trial of Transcranial Direct Current Stimulation for Cognitive Rehabilitation after Stroke
    08:53

    Randomized, Triple-Blind, and Parallel-Controlled Trial of Transcranial Direct Current Stimulation for Cognitive Rehabilitation after Stroke

    Published on: June 6, 2025