Archive for Computational linguistics

Where the magic happens

From today's SMBC, an idea about AI that's obvious in retrospect but seems to be new:

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The Voder — and "emotion"

There was an interesting story yesterday on NPR's All Things Considered, "How We Hear Our Own Voice Shapes How We See Ourselves And How Others See Us". Shankar Vedantam starts with the case of a woman whose voice was altered because her larynx was accidentally damaged during an operation, leading to a change in her personality. And then it segues into an 80-year-old crowd pleaser, the Voder:

All the way back in 1939, Homer Dudley unveiled an organ-like machine he called the "Voder". It worked using special keys and a foot pedal, and it fascinated people at the World's Fair in New York.

Helen, will you have the Voder say 'She saw me'.

She … saw … me

"That sounded awfully flat. How about a little expression? Say the sentence in answer to these questions.

Q: Who saw you?
A: SHE saw me.
Q: Whom did she see?
A: She saw ME.
Q: Well did she see you or hear you?
A: She SAW me.

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"Douchey uses of AI"

The book for this year's Penn Reading Project is Cathy O'Neil's Weapons of Math Destruction. From the PRP's description:

We live in the age of the algorithm. Increasingly, the decisions that affect our lives—where we go to school, whether we get a car loan, how much we pay for health insurance—are being made not by humans but by mathematical models. In theory, this should lead to greater fairness: everyone is judged according to the same rules, and bias is eliminated.

But as Cathy O'Neil reveals in this urgent and necessary book, the opposite is true.

I've been seeing lots of resonances of this concern elsewhere in popular culture, for example this recent SMBC, which focuses on the deflection of responsibility:

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Emotion detection

Taylor Telford, "'Emotion detection' AI is a $20 billion industry. New research says it can't do what it claims", WaPo 7/31/2019:

In just a handful of years, the business of emotion detection — using artificial intelligence to identify how people are feeling — has moved beyond the stuff of science fiction to a $20 billion industry. Companies such as IBM and Microsoft tout software that can analyze facial expressions and match them to certain emotions, a would-be superpower that companies could use to tell how customers respond to a new product or how a job candidate is feeling during an interview. But a far-reaching review of emotion research finds that the science underlying these technologies is deeply flawed.

The problem? You can't reliably judge how someone feels from what their face is doing.

A group of scientists brought together by the Association for Psychological Science spent two years exploring this idea. After reviewing more than 1,000 studies, the five researchers concluded that the relationship between facial expression and emotion is nebulous, convoluted and far from universal.

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ERNIE's here — is OSCAR next?

In "Contextualized Muppet Embeddings" (2/13/2019) I noted the advent of ELMo ("Embeddings from Language Models") and BERT ("Bidirectional Encoder Representations from Transformers"), and predicted ERNiE, GRoVEr, KERMiT, …

I'm happy to say that the first of these predictions has come true:

"Baidu's ERNIE 2.0 Beats BERT and XLNet on NLP Benchmarks", Synced 7/30/2019
"Baidu unveils ERNIE 2.0 natural language framework in Chinese and English", VentureBeat 7/30/2019

Actually I'm late reporting this, since ERNIE 1.0 came out in March:

"Baidu's ERNIE Tops Google's BERT in Chinese NLP Tasks", Synced 3/25/2019

But I'm ashamed to say that the Open System for Classifying Ambiguous Reference (OSCAR) is still just an idea, though I did recruit a collaborator who agreed in principle to work with me on it.

 

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Google needs to learn to read :-)…

John Lawler writes:

I recently had reason to ask the following question of Google

https://www.google.com/search?q=how+many+words+does+the+average+person+say+in+a+day

and the result turned up an old LL post, which is great, except the selection algorithm picked the wrong number as the answer, and even quoted the post you were complaining about as if it were true.

This should probably be brought to someone's attention, but it seems, what with the vast amounts of irony, hyperbole, bullshit, lying, and fact-checking on the net, this is not an isolated problem.

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Blizzard Challenge: Appeal for volunteer judges

From Zhizheng Wu:

We are pleased to announce that the Blizzard Challenge 2019 listening test is now live. The paid listening tests have been running in the University of Edinburgh for two weeks and will finish by 19th July. We need your help as a listener, and to help us recruit more listeners.

Speech experts (you decide if you are one! Native speakers only please!)

http://3.16.124.227/register_expert.html

Everyone else:

http://3.16.124.227/register_volunteer.html

The test takes around 45 minutes. You can do it over several sessions,  if you prefer.

Please distribute the above URL as widely as possible, such as on your  institutional or national mailing lists, or to your students.

Update: Sorry about the lack of guidance on the fact that the synthesis is all in Chinese!  I'm traveling, with somewhat erratic internet, and took a few minutes off from packing to post the appeal without checking it out — apologies again.

 

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Cumulative syllable-scale power spectra

Babies start making speech-like vocalizations long before they start to produce recognizable words — various stages of these sounds are variously described as cries, grunts, coos, goos, yells, growls, squeals, and "reduplicated" or "variegated" babbling. Developmental progress is marked by variable mixtures of variable versions of these noises, and their analysis may provide early evidence of later problems. But acoustic-phonetic analysis of infant vocalizations is hindered by the fact that many sounds  (and sound-sequences) straddle category boundaries. And even for clear instances of "canonical babbling", annotators often disagree on syllable counts, making rate estimation difficult.

In "Towards automated babble metrics" (5/26/2019), I toyed with the idea that an antique work on instrumental phonetics — Potter, Koop and Green's 1947 book Visible Speech — might have suggested a partial solution:

By recording speech in such a way that its energy envelope only is reproduced, it is possible to learn something about the effects of recurrences such as occur in the recital of rimes or poetry. In one form of portrayal, the rectified speech envelope wave is speeded up one hundred times and translated to sound pattern form as if it were an audible note.

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Obituary: Petr Sgall (1926-2019)

Professor Emeritus Petr Sgall, professor of Indo-European, Czech studies, and general linguistics at Charles University in Prague, passed away on May 28, 2019 in Prague, the day after his 93rd birthday.

Over a lifetime of distinguished work in theoretical, mathematical and computational linguistics, he did more than any other single person to keep the Prague School linguistic tradition alive and dynamically flourishing. He was the founder of mathematical and computational linguistics in the Czech Republic, and the principal developer of the Praguian theory of Functional Generative Description as a framework for the formal description of language, which has been applied primarily to Czech, but also to English and in typological studies of a range of languages.

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Cat names from GTP-2

Janelle Shane, "Once again, a neural net tries to name cats", 6/3/2019:

Last year I trained a neural net to generate new names for kittens, by giving it a list of over 8,000 existing cat names to imitate. Starting from scratch, with zero knowledge of English or any context for the words and letter combinations it was trying out, it tried to predict what letters might be found in cat names, and in which order. Its names ranged from the strange to the completely nonsensical to the highly unfortunate (Retchion, Hurler, and Trickles were some of its suggestions). Without knowledge of English beyond its list of cat names, it didn't know what letter combinations to avoid.

So I decided to revisit the cat-naming problem, this time using a neural net that had a lot more context. GPT-2, trained by OpenAI on a huge chunk of the internet, knows which words and letter combinations tend to be used together on the English-language internet. It also has (mostly) figured out which words and letter combinations to avoid, at least in some contexts (though it does tend to suddenly switch contexts, and then, yikes).

Read the whole thing — with pictures! Apparently the Morris Animal Refuge is using this algorithm to name the animals it offers for adoption.

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One law to rule them all?

Power-law distributions seem to be everywhere, and not just in word-counts and whale whistles. Most people know that Vilfredo Pareto  found them in the distribution of wealth, two or three decades before Udny Yule showed that stochastic processes like those in evolution lead to such distributions, and George Kingsley Zipf found his eponymous law in word frequencies. Since then, power-law distributions have been found all over the place — Wikipedia lists

… the sizes of craters on the moon and of solar flares, the foraging pattern of various species, the sizes of activity patterns of neuronal populations, the frequencies of words in most languages, frequencies of family names, the species richness in clades of organisms, the sizes of power outages, criminal charges per convict, volcanic eruptions, human judgements of stimulus intensity …

My personal favorite is the noises it makes when you crumple something up, as discussed by Eric Kramer and Alexander Lobkovsky, "Universal Power Law in the Noise from a Crumpled Elastic Sheet", 1995 ) referenced in "Zipf and the general theory of wrinkling", 11/15/2003).

Contradicting the Central Limit Theorem's implications for what is "normal", power law distributions seem to be everywhere you look.

Or maybe not?

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Moby Zipf

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Accidental art

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