The John Henry effect is an experimental bias introduced into social experiments by reactive behavior by the control group. In a controlled social experiment if a control is aware of their status as members of the control group and is able to compare their performance with that of the treatment group, members of the control group may actively work harder to overcome the "disadvantage" of being in the control group. For example, if in an educational trial where the school classes who are in the treatment receive an extra support teacher, students who are in the control group may be induced to work harder to overcome that disadvantage. The term was first used by Gary Saretsky (1972) to describe the behavior of John Henry, a legendary American steel driver in the 1870s who, when he heard his output was being compared with that of a steam drill, worked so hard to outperform the machine that he died in the process. (Wikipedia).
Physics - E&M: Magn Field Effects on Moving Charge & Currents (22 of 26) The Hall Effect
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain how Hall was able to determine the sign of the charges moving through a conductor.
From playlist PHYSICS E&M 3: MAGNETIC FIELDS, MAGNETIC FORCES, MAGNETIC FIELD SOURCES, ELECTROMAGNETIC INDUCTION
AWESOME Physics demonstration. Coriolis effect (explained)!!!
The Coriolis effect refers to the apparent deflection of objects (such as airplanes, wind, missiles, and ocean currents) moving in a straight path relative to the Earth's surface. Its strength is proportional to the speed of the Earth's rotation at different latitudes. For example, a plane
From playlist MECHANICS
Session 1 - The butterfly effect in spin chains and 2d CFT: Daniel Roberts
https://strings2015.icts.res.in/talkTitles.php
From playlist Strings 2015 conference
The 10 Most Important Physics Effects
A count-down of the 10 most important effects in physics that you should all know about: 10: The Doppler Effect (for sound and light) 9. The (real!) Butterfly Effect 8. The Meissner-Ochsenfeld Effect The video is from here: https://www.youtube.com/watch?v=Rokoid75KxI 7. The Aharonov-
From playlist Physics
Henry's Law Explained - Gas Solubility & Partial Pressure - Chemistry Problems
This chemistry video tutorial explains the concept behind henry's law and how it relates to the partial pressure of a gas above a solution and the gas solubility of that solution. It contains plenty of examples, notes, formulas / equations, and practice problems for you to work with all c
From playlist New AP & General Chemistry Video Playlist
What's the effect of dark energy on gravity?
Subscribe to our YouTube Channel for all the latest from World Science U. Visit our Website: http://www.worldscienceu.com/ Like us on Facebook: https://www.facebook.com/worldscienceu Follow us on Twitter: https://twitter.com/worldscienceu
From playlist Science Unplugged: Dark Energy
Astronomy - Ch. 9.1: Earth's Atmosphere (4 of 61) What is the Greenhouse Effect?
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what is the greenhouse effect on Earth. It is the warming of the atmosphere accomplished by the absorption of the Sun's energy by H2O, CO2, CH4, N2O, O3 (aka, greenhouse gases) and transferrin
From playlist THE GREENHOUSE EFFECT
6 AWESOME DEMOS of Bernoulli's law!
In this video i show some simple experiments about Bernoulli' s law "coanda effect" and how airplane fly. Enjoy!
From playlist MECHANICS
Ten Minute English and British History #14 - Richard II, The Black Death and the Peasants' Revolt
Twitter: https://twitter.com/Tenminhistory Patreon: https://www.patreon.com/user?u=4973164 This episode covers the latter half of Edward II's reign and his overthrow on behalf of his son, Edward III. Edward III's reign saw the beginning of the Hundred Years' War and the Black Death and th
From playlist English and British History
Ten Minute English and British History #10 - The Angevin Empire and Richard the Lionheart
Twitter: https://twitter.com/Tenminhistory Patreon: https://www.patreon.com/user?u=4973164 This episode covers the rise of the House of Anjou/Plantagenet and the birth of what some historians call the Angevin Empire. The episode covers the reigns of two kings, Henry II and Richard I, bett
From playlist English and British History
Ten Minute English and British History #15 - The Hundred Years' War
Twitter: https://twitter.com/Tenminhistory Patreon: https://www.patreon.com/user?u=4973164 This episode covers the epic struggle between England and France for the French throne which lasted for over a century. It covers everything from Edward III's victory at Crécy and the Black Prince's
From playlist English and British History
The Coriolis effect says that anytime you're rotating—whether it's on a playground toy or your home planet—objects moving in straight lines will appear to curve. This bizarre phenomenon affects many things, from the paths of missiles to the formation of hurricanes. You may have heard that
From playlist What the Physics?!
The Coding Train welcomes the inventor of the Lingo programming language John Henry Thompson! 🔗 http://www.johnhenrythompson.com/ 🔗 Scratch: https://scratch.mit.edu/ 🔗 CodeHS: https://codehs.com/ 🔗 DICE: http://www.johnhenrythompson.com/3-dice 🔗 ScummVM: http://scummvm.org/ John Henry T
From playlist Guest Tutorials and Interviews
Brief History of the Royal Family
The Royal Family from 1066 until today. Support the videos: https://www.patreon.com/cgpgrey Research help from: Dr. Carolyn Harris, University of Toronto School of Continuing Studies, author of "Magna Carta and Its Gifts to Canada" http://www.amazon.com/Magna-Carta-Its-Gifts-Canada-eb
From playlist Essential viewing
History of England - Agincourt - Extra History - #5
Henry V was formidable and ruthless. Leading an army struck by dysentery, he pressed on to claim more large swaths of France, forming the irresistible Anglo Burgundian alliance. Thanks again to David Crowther for writing AND narrating this series! https://thehistoryofengland.co.uk/podcasts
From playlist Extra History (ALL EPISODES)
The Boy on the Boat - Objectivity 79
A discussion that starts with a mountain and mapmaker, and ends with a "Photoshopped" shipwreck survivor. Films by James Hennessy and Brady Haran Royal Society website: http://bit.ly/Royal_Society The Royal Society's own YouTube channel: https://www.youtube.com/user/RoyalSociety Facebo
From playlist Object Unboxing on Objectivity
Compton Effect or Compton Scattering (Animated Story)
https://www.patreon.com/quahntasy Help me make more of these animated videos. Compton Effect or Compton Scattering is a collision between a photon and a loosely bound electron of an atom.The Compton effect animation is an attempt to showcase this concept using a animated story. When a ligh
From playlist Amazing Physics Animations and stories