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. :).

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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.

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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.

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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.

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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. Home About Full Circle Contact Resources Wiki Full Circus Full Circle Associates connections for a changing world, online and offline… Aug 26 2008 Good Stuff While I was Gone Published by Nancy White at 1:36 pm under learning , networks , online interaction , social media I bemoan the fact that there is so much good stuff floating by me.

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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! » December 07, 2007 Huh? Uranium Ore on eBay. Useful for testing Geiger Counters. License exempt. Shipped in labeled metal container as shown.

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

Mark Oehlert

For specific samples, we asked 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.

Professors and Bias

Stephen Downes: Half an Hour

The same is true of statistical and sampling bias; if a body of evidence is insufficient or unrepresentative, then this is an argument any person with sufficient statistical knowledge can produce.

driving blind

Harold Jarche

In addition, the students sampled in this work viewed training on the Australian Aboriginal method, in particular, as meaningful, interesting, and fun. Every fortnight I curate some of the observations and insights that were shared on social media. I call these Friday’s Finds.

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The Woozle effect

Dave Snowden

I was a thesis examiner a few years ago and I spotted an all too familiar reference to justify the sample size on a survey. I talked yesterday about metaphor-based languages and used Winnie the Pooh as an illustration.

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Free Sales Tools Reps Can’t Live Without


Free sales tools for startups allow small, agile companies to “move fast and break things”—sampling a variety of sales solutions. Like the elusive Yeti or the Loch Ness Monster, free sales tools might seem like the stuff of folklore.

Tools 236

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.

The Increasing Economic Value of Digital Capital

Irving Wladawsky-Berger

Digital capital has grown disproportionately in a small subset of global superstar firms , which the paper defines as those in the top decile of its sample data based on market value. A firm’s financial statement comprises two distinct types of assets.

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 []

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.

Looking back at the Acorn Study; Part 2: A background to the patterns

Dave Snowden

Given the profile, and how frequent different categories are, we can see that this is a collection of experiences from a very particular context and not a globally representative sample.

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 149

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.

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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 218

Prevarication by platitude

Dave Snowden

To be valid at the most basic level negative cases should also be taken and representative samples also need to be taken.

Sample 137

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.

Natural science as counter-factual

Dave Snowden

That said the whole field of management science which seeks to imitate the natural sciences is subject to physics envy and the confusion of correlation with causation as well as inadequate sample selection.

Sample 207

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.

Sample 137

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).

Looking back at the Acorn Study; Part 9: Seedlings

Dave Snowden

Before we do that, I would like to add a reminder that this study includes a far-from-representative sample and cannot draw conclusions with global applicability.

Study 186

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

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.

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 need for order

Dave Snowden

I have an old medical sample bag that contains all the necessary requirements including a Rab survival bag and other equipment. When I was at school, way back in the days of the white-hot heat of technological optimism, the local printers made a gift to the school of their old platen press and a case of font trays. There were drawers for each font and point size all with a similar layout – a pattern that had emerged from the 15th Century based on the frequency of use.

Module 168

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!

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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

Remembering Gail Sheehy

Doc Searls

BrainyQuotes has 71 samples , which is far short of sufficient. It bums me out that Gail Sheehy passed without much notice—meaning I only heard about it in passing.

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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.

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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

Recommendations for Good Practice Using AI in Learning

Stephen Downes: Half an Hour

Data (or at least, samples of the data) should be studied for potential errors in labeling, data recording, and other systemic errors. Image: Forbes General Design for Humans The application of AI should be based on a human-centered approach.

Data 277

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.

Looking back at the Acorn Study; Part 8.1: And then COVID happened

Dave Snowden

It is also useful to remember that the whole sample is far from representative of the world – even if we had statistical validity, we would still be looking at shadows. The Acorn Study began in the autumn of 2019.

Study 130

A toast to the fools standing high on broadcasting’s hill

Doc Searls

And that’s just a small sampling of what needs to be known in all three forms of broadcasting. In Winter, the cap of dark on half the Earth is cocked to the north. So, as the planet spins, places farther north get more night in the winter.

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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.

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