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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...
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...
Bioequivalence Experimental Study Designs: Repeated Measures, Cross-Over, Carry-Over, and Latin Square Designs01:15

Bioequivalence Experimental Study Designs: Repeated Measures, Cross-Over, Carry-Over, and Latin Square Designs

Bioequivalence experimental study designs play a pivotal role in testing the effectiveness of various treatments. Key among these are the repeated measures, cross-over, carry-over, and Latin square designs. In the repeated measures design, each subject receives all treatments, allowing for temporal comparisons. This type of design is useful in reducing variability but requires careful planning to avoid bias.The cross-over design, an economical method, involves sequential administration of...
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...
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...
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...

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A Naturalistic Setup for Presenting Real People and Live Actions in Experimental Psychology and Cognitive Neuroscience Studies
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A Naturalistic Setup for Presenting Real People and Live Actions in Experimental Psychology and Cognitive Neuroscience Studies

Published on: August 4, 2023

Randomized controlled experiments in health and social sciences: some conceptual issues.

Alok Bhargava1

  • 1Department of Economics, University of Houston, Houston, TX 77204-5019, USA. Bhargava@uh.edu

Economics and Human Biology
|March 8, 2008
PubMed
Summary

Conducting randomized controlled trials in social sciences, particularly in developing nations, presents unique challenges and advantages. This research explores historical context and health science applications from methodological and policy perspectives.

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Area of Science:

  • Social Sciences
  • Health Sciences
  • Development Studies

Background:

  • Randomized controlled trials (RCTs) are crucial for evidence-based practice.
  • Social science research often faces unique implementation hurdles.
  • Developing countries present specific contextual factors influencing research design.

Purpose of the Study:

  • To outline the difficulties and benefits of conducting RCTs in social science settings.
  • To summarize historical developments in social science research methodologies.
  • To discuss applications of RCTs in health sciences from methodological and policy viewpoints.

Main Methods:

  • Literature review of historical developments in randomized controlled trials.
  • Analysis of methodological challenges in social science research.
  • Discussion of policy implications for health sciences applications.

Main Results:

  • RCTs in social sciences, especially in developing countries, involve significant logistical and ethical considerations.
  • Historical evolution shows adaptation of RCTs to diverse research contexts.
  • Methodological rigor and policy relevance are key factors in successful implementation.

Conclusions:

  • Despite challenges, RCTs offer valuable insights in social and health sciences.
  • Context-specific adaptations are essential for effective RCTs in developing nations.
  • Methodological and policy considerations are paramount for maximizing the impact of social science research.