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Related Concept Videos

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.
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...
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches01:23

Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches

Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast, controlled...
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 Trials: Overview01:11

Clinical Trials: Overview

Clinical development focuses on how the drug will interact with the human body and encompasses four key phases of clinical trials, each serving a specific purpose in assessing the safety and effectiveness of new drugs. These phases overlap and build upon one another. Phase I involves a small group of healthy volunteers (typically 20-80 individuals) or, in cases where significant toxicity is expected, patients with the targeted disease, such as cancer or AIDS. The volunteers are tested for...
Blind Procedures02:07

Blind 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...

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Related Experiment Video

Updated: Jul 2, 2026

Validation of a Psychosocial Intervention on Body Image in Older People: An Experimental Design
07:40

Validation of a Psychosocial Intervention on Body Image in Older People: An Experimental Design

Published on: May 31, 2021

Effectiveness of topic-specific infobuttons: a randomized controlled trial.

Guilherme Del Fiol1, Peter J Haug, James J Cimino

  • 1Department of Biomedical Informatics, University of Utah, Salt Lake City, UT, USA. guilherme.delfiol@utah.edu

Journal of the American Medical Informatics Association : JAMIA
|August 30, 2008
PubMed
Summary

Specific infobutton links significantly reduced clinician information-seeking time by 17.4%. While success rates were similar, topic links enhance efficiency for electronic medical record users.

Related Experiment Videos

Last Updated: Jul 2, 2026

Validation of a Psychosocial Intervention on Body Image in Older People: An Experimental Design
07:40

Validation of a Psychosocial Intervention on Body Image in Older People: An Experimental Design

Published on: May 31, 2021

Area of Science:

  • Medical Informatics
  • Clinical Decision Support Systems
  • Health Information Technology

Background:

  • Infobuttons are decision support tools integrated into electronic medical records (EMRs).
  • They aim to provide clinicians with timely access to relevant online information.
  • Effectiveness is key to meeting clinicians' immediate information needs at the point of care.

Purpose of the Study:

  • To compare the effectiveness of specific content topic ('topic') infobutton links versus general overview ('nonspecific') links.
  • To evaluate which type of infobutton link optimizes clinician information retrieval efficiency and impact.

Main Methods:

  • A randomized controlled trial was conducted comparing two groups of clinicians.
  • The control group used nonspecific links, while the intervention group used topic links.
  • Key metrics included session duration, frequency, success rate, and self-reported impact on decision-making.

Main Results:

  • Clinicians using topic links spent 17.4% less time seeking information (35.5s vs. 43s, p=0.008).
  • Information seeking success rates were comparable between groups (89.4% vs. 87.2%, p=0.99).
  • A high positive clinical impact was reported in 62% of all sessions.

Conclusions:

  • Topic links demonstrate greater efficiency by reducing information-seeking time compared to nonspecific links.
  • Infobuttons generally confirm their value in supporting clinical questions at the point of care.
  • A modest improvement in information delivery efficiency for routine users is suggested.