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Related Concept Videos

What is an Experiment?01:12

What is an Experiment?

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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...
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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...
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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.
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Crossover experiments, also called the repeated-measurements design, is a study design in which all experimental units are exposed to all treatments in different periods. Crossover experiments are generally used in psychology, the pharmaceutical industry, agriculture, and medicine.
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The famous and controversial Stanford Prison Experiment, conducted by social psychologist Philip Zimbardo and his colleagues at Stanford University, demonstrated the power of social roles, social norms, and scripts.
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Related Experiment Video

Updated: Jan 26, 2026

Robot-assisted Partial Splenectomy
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Early experience with robotically assisted laparoscopic donor nephrectomy.

Santiago Horgan1, Daniel Vanuno, Enrico Benedetti

  • 1Division of General Surgery, University of Illinois, Chicago 60612-7233, USA. shorgan@uic.edu

Surgical Laparoscopy, Endoscopy & Percutaneous Techniques
|May 15, 2002
PubMed
Summary
This summary is machine-generated.

Robotically assisted laparoscopic donor nephrectomy using the da Vinci system shows promising results, with outcomes comparable to traditional laparoscopic methods. This approach offers enhanced precision and comfort for surgeons performing kidney donation procedures.

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Area of Science:

  • Surgical Technology
  • Nephrology
  • Minimally Invasive Surgery

Background:

  • The da Vinci robotic system was introduced in late August 2000.
  • Robotically assisted surgery offers potential advantages in restoring hand-eye coordination and 3D visualization lost in conventional laparoscopy.

Purpose of the Study:

  • To evaluate the feasibility and outcomes of robotically assisted laparoscopic donor nephrectomy.
  • To compare early results with established laparoscopic donor nephrectomy techniques.

Main Methods:

  • A prospective study of 10 consecutive patients undergoing robotically assisted laparoscopic donor nephrectomy between January and May 2001.
  • Data collected on operative time, hospital stay, and postoperative pain management.

Main Results:

  • Mean operative time was 166 minutes.
  • Mean hospital stay was 1.8 days.
  • Parenteral pain medication was needed only on the first postoperative day; all transplanted kidneys were successful without rejection.

Conclusions:

  • Robotically assisted laparoscopic donor nephrectomy is a viable procedure with outcomes similar to standard laparoscopic donor nephrectomy.
  • The da Vinci system may enhance surgical precision, confidence, and comfort during donor nephrectomy.