It's called the LAW OF SUBTRACTION, the act of removing anything that's excessive or unnecessary. The content that remains is much stronger for it. Unrestrained freedom to talk as long as you want or to create as many slides as you desire will only result in a presentation that is long, boring, meandering, and confusing. Dr. Perrodin recorded a school safety presentation that was a svelte 7 minutes and 53 seconds long! Seem impossible? Corners cut? Nope. And here’s how we can overhaul school safety professional development by boiling presentations and adding a large countdown clock in every school? 10 MILLION NEW STAFF AND STUDENTS AFTER FIRST DAY OF CLASS. Dr. Perrodin reflected upon a work project with a school safety client that wanted to provide training for staff and students that joined the school community during the year. It was not realistic to provide these individuals with the depth of training afforded to staff during the inservice week preceding the start of classes. Upon further examination, David proposed a complete overhaul of the school’s professional development format. 10-18 MINUTES IS THE LONGEST ANYONE WILL ENGAGE WITH A PRESENTATION. According to biologist John Medina at the University of Washington School of Medicine, “Your audience will mentally check out of your next PowerPoint presentation after about 10 minutes. Given a presentation of moderately interesting content, your audiences’ attention will ‘plummet to near zero’ after 9 minutes and 59 seconds. Before the first quarter-hour is over in a typical presentation, people usually have checked out,” says Medina who cites peer-reviewed studies to reinforce this observation. ALL TED TALKS ARE 18 MINUTES. TED curator Chris Anderson explained the organization’s thinking this way: “It [18 minutes] is long enough to be serious and short enough to hold people’s attention. It turns out that this length also works incredibly well online. It’s the length of a coffee break. So, you watch a great talk, and forward the link to two or three people. It can go viral, very easily. The 18-minute length also works much like the way Twitter forces people to be disciplined in what they write. By forcing speakers who are used to going on for 45 minutes to bring it down to 18, you get them to really think about what they want to say. What is the key point they want to communicate? It has a clarifying effect. It brings discipline.” DR. PERRODIN DELIVERED AN 8 MINUTE SCHOOL SAFETY PRESENTATION. He noted, “We [Society] are convinced that more is better and that a concise, engaging presentation somehow shortchanges of us compared to a rambling 90-minute lecture. We need to move beyond this mistaken belief and completely revamp school safety induction to include much shorter presentations and more coupling of new staff to peer mentors available to answer questions. I’ve changed my own consulting model to shorter presentations and have found across-the-board positive results from clients. FOLLOW DR. PERRODIN: Twitter @SafetyPhD and subscribe to The Safety Doc YouTube channel & Apple Podcasts. SAFETY DOC WEBSITE & BLOG: The Safety Doc Podcast is hosted & produced by David Perrodin, PhD. ENDORSEMENTS. Opinions are those of the host & guests and do not reflect positions of The 405 Media or supporters of “The Safety Doc Podcast”. The show adheres to nondiscrimination principles while seeking to bring forward productive discourse & debate on topics relevant to personal or institutional safety. Email David: LOOKING FOR DR. TIMOTHY LUDWIG, PHD? Dr. Perrodin’s “Safety Doc Podcast” negotiates school and community safety. To be informed about industrial safety, please contact Appalachian State University Professor Dr. Timothy Ludwig, PhD, at 

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