Subject: [AUDITORY] Natural experiment example needed From: "Huron, David" <000003d54289e601-dmarc-request@xxxxxxxx> Date: Fri, 4 Apr 2025 17:23:06 +0000--_000_SN7PR01MB8186B6098E1601F12AB97C50B8A92SN7PR01MB8186prod_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable In teaching research methods to music-psychology students, for years I have= illustrated a "natural experiment" by discussing how shutting down air tra= ffic in the aftermath of 9/11 allowed climate scientists to determine the e= ffect of aircraft vapor trails on earth's overall temperature. (Do vapor tr= ails cool the earth by blocking sunlight, or is the net effect to warm the = earth by blocking reflected surface heat from radiating into space?) I'd like to have an updated example, preferably something we learned about = music or hearing arising from Covid isolation -- something students could b= etter relate to. Any suggestions? Cheers, David Huron --_000_SN7PR01MB8186B6098E1601F12AB97C50B8A92SN7PR01MB8186prod_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <html> <head> <meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Diso-8859-= 1"> <style type=3D"text/css" style=3D"display:none;"> P {margin-top:0;margin-bo= ttom:0;} </style> </head> <body dir=3D"ltr"> <span style=3D"font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService,= Calibri, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0);">In = teaching research methods to music-psychology students, for years I have il= lustrated a "natural experiment" by discussing how shutting down air traffic in the aftermath of 9/11 allowed = climate scientists to determine the effect of aircraft vapor trails on eart= h's overall temperature. (Do vapor trails cool the earth by blocking sunlig= ht, or is the net effect to warm the earth by blocking reflected surface heat from radiating into space?)</= span> <div class=3D"elementToProof" style=3D"font-family: Aptos, Aptos_EmbeddedFo= nt, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; c= olor: rgb(0, 0, 0);"> <br> </div> <div class=3D"elementToProof" style=3D"font-family: Aptos, Aptos_EmbeddedFo= nt, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; c= olor: rgb(0, 0, 0);"> I'd like to have an updated example, preferably something we learned about = music or hearing arising from Covid isolation -- something students could b= etter relate to.</div> <div class=3D"elementToProof" style=3D"font-family: Aptos, Aptos_EmbeddedFo= nt, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; c= olor: rgb(0, 0, 0);"> <br> </div> <div class=3D"elementToProof" style=3D"font-family: Aptos, Aptos_EmbeddedFo= nt, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; c= olor: rgb(0, 0, 0);"> Any suggestions?</div> <div class=3D"elementToProof" style=3D"font-family: Aptos, Aptos_EmbeddedFo= nt, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; c= olor: rgb(0, 0, 0);"> <br> </div> <div class=3D"elementToProof" style=3D"font-family: Aptos, Aptos_EmbeddedFo= nt, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; c= olor: rgb(0, 0, 0);"> Cheers,</div> <div class=3D"elementToProof" style=3D"font-family: Aptos, Aptos_EmbeddedFo= nt, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; c= olor: rgb(0, 0, 0);"> David Huron</div> <div class=3D"elementToProof" style=3D"font-family: Aptos, Aptos_EmbeddedFo= nt, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt; c= olor: rgb(0, 0, 0);"> <br> </div> </body> </html> --_000_SN7PR01MB8186B6098E1601F12AB97C50B8A92SN7PR01MB8186prod_--