We Know That Smell Can Trigger Emotions And Bring Back Old Memories, But How Does It Work? IDEAS Posted: July 7, 2017 8:06 amKatherine Whitcroft examines the history of what’s now called the “Proustian effect.” Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to email a link to a friend (Opens in new window)