Today was a historic day for Toronto, for Canada, and for the game of basketball in this country. The Toronto Raptors are world champions for the first time since their founding in 1995. Soak it in. Here is a photo that I took of the parade coming through the Financial District at around 2:30pm:

Some of the estimates going around are that 1 to 2 million people attended today's championship parade. But 2 million seems like a lot, even though today was frenetic (see above photo, again). I mean, that's 1/3 of the population of the Greater Toronto Area.
The fact that some of the "official" estimates also have a 1 million person spread tells me that, as of right now, we actually have no idea how many people were at today's parade.
So that got me thinking: How do people count crowds? And are we using drones to do it, yet? Subway and rail ridership for the day -- which surely spiked -- will give us some indication. But definitely not the full picture.
It turns out that the typical approach to counting crowds is known as Jacobs' Method. It was invented in the 1960s by a professor at UC, Berkeley, named Herbert Jacobs. He came up with the method while trying to count the number of students protesting the Vietnam War.
The concept is simple: It's area x density. And permutations of his method usually use this same principle. What you do is take the area filled with people, break it up into a smaller grid, and then come up with a population density estimate for each square.
He had some rules of thumb for that. A light crowd was about 1 person per 10 square feet. And a dense crowd (such as a mosh pit or an NBA championship parade in Toronto) was about 1 person per 2.5 square feet.
Using this method and aerial photos of today's parade, I would imagine that we could eventually get to a more precise estimate than 1 to 2 million people. But surely somebody has figured out how to program a drone (or other UAV) and do this even more accurately.
Crowd data is valuable information, particularly for political rallies and protests (I would imagine). If you know of a company doing this, please leave it in the comment section below. And if it doesn't yet exist, well then, now you have a new business idea.

Roman Mars of 99% Invisible recently published an excellent episode called The Mind of an Architect. It has to do with a set of research studies completed in the late 1950s by an organization at the University of California, Berkeley known as the Institute of Personality Assessment and Research (IPAR).
IPAR was founded by a personality psychologist named Donald MacKinnon. He initially worked for the precursor to the CIA and founded IPAR with the intent of studying “combat readiness and efficiency.” But over fears of how creative the Soviets were getting, the focus of IPAR shifted to instead studying creativity.
And architects were deemed to be an ideal test subject (from 99percentinvisible.org):
“Researchers saw architects as people working at a crossroads of creative disciplines, a combination of analytic and artistic creativity. As professionals, architects had to be savvy as engineers and businessmen; as aesthetes, they also acted as designers and artists.”
So over a series of weekends in the late 1950s, some of the most celebrated minds in architecture – including people like Philip Johnson, Richard Neutra, and Louis Kahn – were studied and picked apart.

Miriam Zuk and Karen Chapple of the University of California, Berkeley, recently published a research brief called Housing Production, Filtering and Displacement: Untangling the Relationships.
It’s a nuanced look at the impact of both market-rate and subsidized housing production on affordability and displacement within the San Francisco Bay Area.
The report is essentially a response to the debate around whether increasing market-rate housing production alone can address affordability and displacement concerns, or whether the only way to do it is through subsidized housing. What they found was that both matter, but…
“What we find largely supports the argument that building more housing, both market-rate and subsidized, will reduce displacement. However, we find that subsidized housing will have a much greater impact on reducing displacement than market-rate housing. We agree that market-rate development is important for many reasons, including reducing housing pressures at the regional scale and housing large segments of the population. However, our analysis strongly suggests that subsidized housing production is even more important when it comes to reducing displacement of low-income households.”
If you’re interested in this topic, I recommend reading the full brief. It’s only 12 pages. I particularly liked the information around filtering and how new housing steps down over time to ultimately serve lower-income households.
They were asked to do quick sketches, create mosaics, and they were asked questions such as this one: “For the next 45 minutes we would like you to discuss this notion: if man had developed a third arm, where might this arm be best attached?”
In the end, here’s what they concluded:
The researchers began to notice certain patterns across creatives of all professions and genders, including a tendency to nonconformity and high personal aspirations. They also found many creatives shared a preference for complexity and ambiguity over simplicity and order. Creatives could make unexpected connections and see patterns in daily life, even those lacking high intelligence or good grades.
In short: IPAR found that creative people tend to be nonconforming, interesting, interested, independent, courageous and self-centered, at least in general. Many of these traits may seem obvious today, but they were not necessarily obvious prior to these studies. Back when their tests were being conducted and findings presented in the 1950s and ’60s, the very idea of a “creative personality” was a novelty in academic and public discourse.
The findings may not be groundbreaking to us today, but the documents and recordings produced during the study are certainly interesting. If you’re into this topic, there’s also this book you can pick up.
Oh, and if we are to have a third arm, I would like mine to run almost parallel to my existing dominant arm (right). That way I could double up on my most potent dexterity. It would also be far less intrusive than an arm on one’s head or in the middle of one’s back. Then again, it would ruin our symmetry as humans. And perhaps that third arms need to be celebrated instead of being masked.
What would you suggest?
Image: Institute of Personality and Social Research, University of California, Berkeley / The Monacelli Press (via 99% Invisible)
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