Sampling error’s more dangerous friend

Mind Hacks

Polls rely on sampling – the basic idea being that you don’t have to ask everyone to get a rough idea of how things are going to go. This is the issue of sampling error. But, as Tim Harford points out in in this excellent article on sampling problems big data , with every sample there are two sources of unreliability. Sampling error, as I’ve mentioned, but also sampling bias. sampling error has a far more dangerous friend: sampling bias.

Sample Article

Stephen Downes: Half an Hour

Shakespeare I like Shakespeare. :).

Sample 100

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Request for Proposal (RFP) Samples

Tony Karrer

Based on my post LMS RFP , I've been asked several times if I knew where you could find samples of Request for Proposals (RFPs) for custom eLearning development, performance support tools, learning content management systems (LCMS), elearning authoring tools , etc.

RFP 100

Is Wikipedia getting too hard? A random sampling

David Weinberger

Please note that this is an entirely unscientific, non-significant sampling. A couple of weeks ago, I happened to come across a few Wikipedia articles that struck me as too hard. I started getting worried that Wikipedia’s constant review process was resulting in articles inching up the Technical Accuracy pole while slipping down the Intelligibility for Non-Experts pole.

Sample 100

Sampling from the stream of consciousness

Mind Hacks

Recently, psychologists have developed the experience sampling method to try and make sample the stream of consciousness a little more systematic. The New York Times has a fascinating article revisiting a classic problem in psychology of whether our accounts of our individual 'streams of consciousness' have any useful role in the scientific understanding the mind.

I’m Celebrating NTEN on #GivingTuesday (Dec. 3rd at 9 am PST) – Join Me and NTEN CEO Amy Sample Ward

Beth Kanter

Join me for a chat on #GivingTuesday, December 3 at 9:00 am PST on my LinkedIn Influencer blog with NTEN CEO, Amy Sample Ward. Join me for a chat on #GivingTuesday, December 3 at 9:00 am PST on my LinkedIn Influencer blog with NTEN CEO, Amy Sample Ward. I have to applaud Amy Sample Ward, CEO of NTEN, for seeing the benefits of collective action and participation in a national day of giving. I’m taking off my red hat off on #GivingTuesday (Dec.

Grokking Aha!

Jay Cross

Sample images from Aha! 75 Ways to Work Smarter. Buy it now.

Sample 124

Do You Sociate? » Midomi delivers an old wish-list item of mine

Jerry Michalski

List 100

Good Stuff While I was Gone | Full Circle Associates

Nancy White

Here is a sampling of stuff that has caught my eye, and why.

Sample 130

e-Clippings (Learning As Art): Huh? Uranium Ore on eBay.

Mark Oehlert

" Product Description: Radioactive sample of uranium ore. Uranium ore sample sizes vary. e-Clippings (Learning As Art) Home Archives Subscribe About My Social Networks « Generational Change in the U.S. Military (strategy+business) | Main | 2007 edublog winners announced!

e-Clippings (Learning As Art): Top Ten AntiSpyware Apps from CNET

Mark Oehlert

For specific samples, we asked Download.com to send us adwareand spyware theyve seen in the wild, to better replicate the examplesyou are likely to encounter on your own, not theoretical or "zoo"examples.

Big Data Takes Center Stage

Irving Wladawsky-Berger

The first is what they call n=all, that is, collect and use lots of data rather than settling for small samples, as statisticians have done until now. “The The way people handled the problem of capturing information in the past was through sampling. When collecting data was costly and processing it was difficult and time consuming, the sample was a savior. Sampling requires anticipating how the data will be used so you can design the proper sample.

Data 197

Are online experiment participants paying attention?

Mind Hacks

One concern, however, is that online samples may be less motivated to pay attention to the tasks they are participating in. Based on these results, it appears that concerns over participant inattentiveness may be more applicable to samples recruited from traditional university participant pools than from Mechanical Turk. Online testing is sure to play a large part in the future of Psychology.

Here’s how Google can save podcasting from getting silo’d

Doc Searls

Sample here.) Give podcasting full respect by making it a search heading. Bing should do it too. Also DuckDuckGo. In fact all search engines should make podcasts a search heading. Simple as that. If they make podcasts a search heading, they’ll make podcasting too big a category to fracture into a forest of silos. This doesn’t mean Apple, Spotify and others can’t continue to offer subscriptions and other forms of aggregation. Or that ListenNotes will go out of business.

Sample 108

Ten Alternatives to Happy Sheets

Nigel Paine

Interview a sample of participants and ask for their views. Interview a sample of line managers and ask what changes they have noticed. Sample customer satisfaction. Ask what performance changes you want to see and then measure them. Use the staff survey as an indicator of change. Measure increases in activity following on from the training. Ask the participants to comment one month or three months on about the continuing benefits.

Links for 2008-07-23 [del.icio.us]

Clark Quinn

Brobst Systems - Ready-made Website Templates and Themes - Free Samples Social Bookmarking For Enterprise Knowledge Management | Intelligent Agent. Martin De Saulles » SMEs and the Web - Executive Summary. SEOmoz | Beginner's Guide to SEO - Single Page Version.

Remote Work is Surprisingly Productive, But For Many… Something Is Missing

Irving Wladawsky-Berger

The survey was based on two separate national samples of US data, - one which gathered 25,000 responses in early April, and the second another 25,000 responses in early May. What If Working From Home Goes on … Forever?

My/Our research …

Dave Snowden

They would then go and interview maybe 10/15 organisations using a strong hypothesis and from that sample draw conclusions that would be published. . I’ve long pointed out to over enthusiastic proponents of ‘story telling’ that the phrase has a double meaning in English and the most dominant one is to tell a story.

Social Physics and Cybercrime Detection

Irving Wladawsky-Berger

These advanced statistical methods have enabled the creation of AI algorithms that can be trained with lots and lots of sample inputs instead of being explicitly programmed.

Data 203

Big, thick and rich (the data)

Dave Snowden

It comes to us in the form of a small sample size and in return we get an incredible depth of meanings and stories. Within a research context, stories are intentionally gathered and systematically sampled, shared, debriefed, and analyzed, which produces insights (analysis in academia).

Data 169

A Novel Method for Measuring the Value of Free Digital Services

Irving Wladawsky-Berger

Compared with GDP, we are only able to provide a relatively coarse estimate of changes in consumer surplus given our sample size… Future work should use more massive sample sizes… Another limitation of our study is that it is biased toward people using the internet. Gross domestic product (GDP) is the basic measure of a country’s overall economic output, based on the market value of all the goods and services the country produces.

Price 156

Jon Kabat Zinn

Jay Cross

You may want to sample. I bailed out of the Wisdom 2.0 conference Main Stage events yesterday afternoon and missed the opportunity to see Jon Kabat Zinn , whom I only know from his books and tapes: Jon is a god. I revere him. He moves mountains. So I was elated to find this recording of his presentation this morning.

Power analysis of a typical psychology experiment

Mind Hacks

Since it is a common test, I’ve been doing a power analysis for a two-sample (two-sided) t-test, for small, medium and large effects (as conventionally defined ). the required sample size increases drammatically as power drops. for small effects, the sample required for 80% is around 400 in each group (total n = 800). You really should prefer within-sample analysis, whenever possible (power analysis of this left as an exercise).

Blockchain and Public Health Solutions

Irving Wladawsky-Berger

Population data. “All these data would represent the entire population, not some partial and potentially misleading sample of it. The Blockchain Research Institute (BRI) is a global think tank dedicated to the strategic implications of blockchain technologies to business, government and society. On March 26, I participated in a virtual roundtable convened by the BRI to discuss the potential use of blockchain technologies for public health solutions.

Neoliberalism and MOOCs: Amplifying nonsense

George Siemens

In recent presentations, I’ve been positioning MOOCs in terms of the complexification of higher education (see below for sample presentation). I’ve said this many times over the past six months: If 2012 was the year of the MOOC, 2013 will be the year of the anti-MOOC. Things are unfolding nicely according to plan. Faculty don’t like MOOCs. Critiquing MOOCs is now more fashionable than advocating for them.

Sample 218

Passion and Learning

Clark Quinn

My better half recently got a sample of special butter. A gift from a co-worker (an interesting story), and led me to reflect on the link between passion and learning. M’lady’s co-worker is a fan of good butter. I was able to view a picture of her refrigerator, and the assortment of butters rivals what you might see in a fine grocery! We did a tasting between the ordinary butter we ordinarily purchase and this special butter. The difference was noticeable.

Sample 112

70-20-10: Origin, Research, Purpose

Charles Jennings

These include samples in China, India and Singapore and for female leaders, since the original samples of executives in the early 80s were mostly male. They are 70-22-8, 56-38-6 (women), 48-47-5 (middle level), 73-16-11 (global sample), 60-33-7, 69-27-4 (India), 65-33-2 (Singapore) and 68-25-7 (China). This is a re-post of an article by Cal Wick of Fort Hill. The original is on the 70-20 Blog site. There are a few observations from me at the bottom.

The smell of boiling frog

Doc Searls

I just got this email today: Which tells me, from a sample of one (after another, after another) that Zoom is to video conferencing in 2020 what Microsoft Windows was to personal computing in 1999.

WebEx 146

This Week in Law: Not all that legal

David Weinberger

A Nina sample On Friday I was part of the This Week in Law vidcast, hosted by my it’s-been-too-long friend Denise Howell [twitter: dhowell ], along with Nina Paley [twitter: ninapaley">ninapaley ]. Nina’s work is gorgeous + righteous. You must see it. That is an order.) It was a non-lawyerly discussion, which I was relieved to find out not because I dislike lawyers but because I could not have participated except by intermittently interjecting, “I object!

Sample 122

Designing with science

Clark Quinn

Ideally, with your sample population. How should we design? It’s all well and good to spout principles, but putting them into practice is another thing. While we always would like to follow learning science, there’re not always all the answers we need.

Design 189

New Book from Jay. Almost.

Jay Cross

website for more information, sample graphics, and a substantial excerpt. The draft of my new book, Aha!, 21 Ways to Work Smarter and Become Who You Are , is on sale for $12. I don’t write books the way I used to. I have Lean Fever. Now I write the best I can rapidly and make it available for pioneering readers who provide feedback. Given enough iterations, this will be one fantastic book. I slipstream new content into the book continuously.

Sample 138

Brilliant folks that need to be read.

George Siemens

A recent sampling of their thinking: From Kate: I really think the measure of our capacity to call ourselves a community relates to our responses in a whole range of situations for which there can’t be laws or even social demands, but only instinct… and that’s where I think we are with our transactions, our struggling social communities, our networks, the places and persons that we care for.

Sample 157

Stories from stories

David Weinberger

You can read a sample here , or buy it here. My sister-in-law’s new book is out: Re-visions: Stories from Stories, by Meredith Sue Willis. She re-tells classic stories from a different point of view. I haven’t read it yet — I just ordered it — but I’m willing to bet it’s excellent. Sue (as we call her) has the fiction writer’s gift of bringing people and places to life. How does she do that

Sample 116

zoom is not the problem — meetings are

Harold Jarche

His book ‘The Nature of Managerial Work’ found that more than half of managers’ time in his sample was spent in meetings.” — CNBC 2015. When all you have is Zoom, every work-from-home office looks like an endless face-to-face video call. I have been working remotely since 2003. Video calls have been a regular part of my work and I have used pretty well every platform available.

Time for advertising to call off the dogs

Doc Searls

A sample of that stench is wafting through the interwebs from the Partnership for Responsible Addressable Media , an ad industry bullphemism for yet another way to excuse the urge to keep tracking people against their wishes (and simple good manners) all over the digital world. Is this the way you want your brand to look? Digital advertising needs to sniff its own stench, instead of everybody’s digital butts.

Educational Research in Learning Technology

Stephen Downes: Half an Hour

Sample Size 4. Sample size and representation (see below) are the two cardinal principles of statistical methodology, and it we well known that a sample of a certain size is needed for a survey ti be accurate "plus or minus three percent, 19 times out of 20".

Pick my brain?

Clark Quinn

So for the first one, they wanted some feedback on their design, and we arranged that I’d investigate a representative sample and provide feedback. There were also some places where they’d managed to have some errors that had passed editorial (and this was only a small sample of a replicated model across a broad curriculum).

Sample 132

When Football Kills Good Pedagogy in College

Nine Shift

Students are allowed to sample classes before they have to register for them." . Here's a disturbing story about how good teaching and learning is being killed by college football. Calstate was put on NCAA probation for practicing good teaching and learning! Here's the deal, according to a story by New York Times columnist Joe Nocero. Part of being a student at Caltech means “shopping” for courses for the first three weeks of each trimester.

Sample 116

Zoom needs to clean up its privacy act

Doc Searls

A few samples: Zoom is a work-from-home privacy disaster waiting to happen ( Mashable , March 13). As quarantined millions gather virtually on conferencing platforms, the best of those, Zoom , is doing very well. Hats off. But Zoom is also—correctly— taking a lot of heat for its privacy policy , which is creepily chummy with the tracking-based advertising biz (also called adtech ).

Data 219

Using Computers to Cure Medicine’s Pathologies

Andy McAfee

I read a little while back that a team at Stanford and elsewhere had developed a program that could accurately diagnose breast cancer by doing digital image processing of tissue sample. Here’s a high-level, simplified outline of the effort: The team used a set of 248 breast cancer samples from women in the Netherlands to train the program, called C-Path, to grade the severity of the disease by digitally ‘looking at’ slides of tissue.

Sample 162

Enterprise Learning & Digital Transformation

Jay Cross

Nine out of ten companies sampled by Altimeter are engaged in one or more digital transformation practices: These efforts are being championed by the Chief Marketing Officer, the CEO, and occasionally the CIO. Enterprise Learning takes learning beyond the training department into the overall extended enterprise, the “Workscape.” ” It’s a breakout that’s happening throughout organizations as they embrace digital technology.

Sample 150

Facebook doesn’t make your stupid. Whoops.

David Weinberger

This paper attempts to replicate the results reported in the press release using three data sets: one with a large sample of undergraduate students from the University of Illinois at Chicago, another with a nationally representative cross sectional sample of American 14– to 22–year–olds, as well as a longitudinal panel of American youth aged 14–23. In none of the samples do we find a robust negative relationship between Facebook use and grades.

Cluetrain at fifteen

Euen Semple

Take this sample from the interview: Markets are conversations. Doc Searls has shared an interview done in 2000 about The Cluetrain Manifesto. Most of its theses are as as fresh and relevant now as they were fifteen years ago. Markets consist of human beings, not demographic sectors. Conversations among human beings sound human. They are conducted in a human voice. Hyperlinks subvert hierarchy. There are no secrets.

Sample 160