On the radar?

I missed the Twitter exchange about radar plots yesterday.

I caught up with some of the exchanges through a Ted Knutson post about Revisiting Radars.

Ted noted “The fact that lots of people have reactions to this type of work is a good thing, not a bad one”.

I have been using radar plots in my work for some time. I am mindful of the issues that Luke and Sam (@stat-sam) raise.

Some time ago (2008), I was fascinated by the title of a Purna Duggirala (Chandoo) post You are NOT spider man, so why do you use radar charts? I enjoyed Graham Odd’s (2011) critique of radar charts too.

Primed with Graham’s observation:

… the overall shape presented for a series on a radar chart does not leverage any of the pre-attentive attributes we perceive quantitatively. In essence, this means we are unable to attribute much genuine meaning to the shape of a series. The only patterns our visual perception can really discern in a data set presented as a radar chart are similarity and extreme outliers.

I tried to use my radar charts as a stimulus for conversation. Like, Ted, over the years I have found radar charts a good way to hook attention and trigger conversation. I had similar experiences to Ted in a variety of sport contexts:

In situations like this, visuals go a long way toward opening the conversation. If you show a table of numbers to a coach who isn’t already on board, you’re dead. Bar charts? Only mostly dead. Radars? Interesting… Tell me more.

My use of the charts acknowledged the limitations of the visualisation. Once the coaches had started to discuss the issues raised by a fallible (flawed) visualisation, we inevitably started to discuss how performance might be re-presented (represented) which led in many cases to some fascinating second-order conversations about observation and the narratives we build around performance … and other forms of visualisation.

My willingness to use radar charts dates back to William Anderson’s (1971) discussion of descriptive-analytic research in physical education. He notes:

Their principal concern is to collect accurate descriptive records of events in actual classrooms and to analyze these records in a way that enables a better understanding of the events. (1971:2)

He adds:

The descriptive records of teaching which emerge are in many ways like the descriptive record of a basketball game contained in a basketball shooting chart. The shooting chart is a diagram of a basketball court on which is recorded the number of each player who took a shot, the place on the court from which the shot was taken, and whether the shot was made. The shooting chart is a record of a critical dimension of “real world events” (the game). A careful examination of the chart can lead to understandings and insights which were not possible during the game itself. In much the same way, descriptive records of teaching provide a picture of real world events (classroom interaction) which lead to a deeper understanding of the teaching process. (1971:3)

Ted makes the point “As I designed them, radars exist to help you open the door with statistical novices, and from that perspective they have been wildly successful”.

This happened in conversations about pedagogy too in William Anderson’s work.

Like Ted, I am acutely aware of the flaws in radar charts. We have unprecedented expertise in sport now. The stories we can produce have immense visualisation resources to share performances. The key for me will be how we work with a variety of audiences in sport, and particularly in decision support for coaches, to achieve the level of engagement Ted reports:

Radars start a conversation. They get a reaction. And for whatever reason, football people are often more comfortable talking about and digesting them than almost any other vis type I have encountered. (Original emphasis.)

These issues are why I have included Audiences and Messages in my open, online discussion of sport informatics and analytics. We have great opportunities for conversation in our community of practice about diverse practices.

Photo Credit

Crystal web (Wendy, CC BY NC-ND 2.0)

Coach education: watch making and pinball?

This is a photo of the Prague astronomical clock, or Prague orloj (Czech: Pražský orloj [praʃskiː orloj]), is a medieval astronomical clock located in Prague, the capital of the Czech Republic. The clock was first installed in 1410, making it the third-oldest astronomical clock in the world and the oldest one still operating.

This morning, John Kessel shared a poem with me (and his network of coaches) written by Terry Pettit.

The title is If I Could Coach Again. I copy it in full as a postscript to this post.

The poem arrived early morning here in Braidwood and made a great start to my day. The first line … “If I could coach again, I would speak in a softer voice”.

The poem landed just as I had finished reading a post in The Scholarly Kitchen that contained this quote:

The world changed from having the determinism of a clock to having the contingency of a pinball machine. (Heinz Pagels,  The Cosmic Code: Quantum Physics as the Language of Nature, 1982.)

There is a visualisation in the post. Although it refers directly to scholarly publishing and communication, I thought a visualisation of coach education environments might look similar:

A visualisation of the Future Lab's 2021 tech trends which appear as a pinball table.

Todd Carpenter, the author of the post, noted that the creators of the visualiation, the Future Lab group:

envisioned the new environment of our community as a giant pinball machine, with different components ricocheting the “ball” of value around the field of play, buffeted by bumpers, and potentially high-scoring opportunities in service of various areas. Just like a true pinball machine, there are risks and gutters where one’s ball can be lost.

This took me back to “the determinism of a clock” and this example of design and production:

The journey from John’s shared poem to this post was completed by contemplating Charles Jennings’ discussion of knowledge and learning transfer.

We can’t and don’t transfer knowledge between people.

We can create and use techniques and approaches that help and facilitate knowledge acquisition. We can share information in the form of data and our own insights. We can create environments where people are likely to have their own insights – their lightbulb moments – and we can help people extract meaning and learn through their own experiences.

But we don’t transfer knowledge. Not between people, or even between organisations.

Somewhere in this amalgam there is an opportunity to contemplate precision and chance in coach education. In Terry’s words we can open our practice to anyone who might be interested … watchmakers and pinball wizards.

A photograph at the end of a rugby union final in 2017. The coach thinks this is the start of a learning journey with a group of players and his own coaching.

Photo Credits

Prague 313 (fourthandfifteen, CC BY 2.0)

The end of the beginning (Keith Lyons, CC BY 4.0)

Postscript: the poem

If I Could Coach Again
I would speak in a softer voice
I would let players discover
More things for themselves
I would find ways
For players to take care
Of themselves
I would empower my assistants
To speaker in a louder voice
I would recruit a more
Diverse roster
I would control less
And empower more
I would travel
In the preseason
I would encourage each
Team member
To befriend the disabled
The disenfranchised
The people less fortunate
I would take more
Risks in scheduling
On the road
I would purchase
Season tickets and give
Them to people who
Did not have access
I would open practice
To any who wanted to watch
I would fight harder
For opportunities for women
I would risk losing more
Matches in the season
To prepare for the tournament
I would work to develop
The trust that I had with setters
With other positions
I would let go of the game
When I got to home
To my family
I would wait until the next day
To speak to a player
Who had not played her best
I would make the effort to understand
What players are dealing with
Off the court
I would let players know they are
More than their performance
I would share more with other coaches
But this is not going to happen
Because my time has passed
I have left the arena
And I will not coach again.

Complex Systems in Sports

Thumbnail picture of the Camp Nou Stadium from end on.An international congress of complex systems in sports is being held in Barcelona in October 2017. The venue is the Camp Nou Stadium.

There is a call for abstracts.

The two-day program includes presentations from:

Scott Kelso (Principles of Coordination)

Wolfgang Schöllhorn (Differential Training)

Rafel Pol (Cons-Training in Team Sports)

Robert Hristovski (Unpredicatability in competetive environments)

Jaime Sampaio (Dimensions of Performance)

Paco Seirul-lo (Closing remarks)

A thumbnail picture of the 1899 Auditorium that can seat up to 400 attendees.There are seven workshops:

Game and performance analysis

Training and learning methodologies


Performance assessment in sport

Developing resilience

Athletes as complex adaptive systems

Interpersonal coordination

News of the conference appeared as the Sante Fe Institute is running its open, online course Introduction to Complexity. When I enrolled, there were 2367 other students following the course.

The syllabus for the course is:

  • What is Complexity?
  • Dynamics and Chaos
  • Fractals
  • Information, Order, and Randomness
  • Genetic Algorithms
  • Cellular Automata
  • Models of Biological Self-Organization
  • Models of Cooperation in Social Systems
  • Networks
  • Scaling in Biology and Society

To complete a week of connections, I received an alert to Mark Upton’s post, Seeking the Edge of Chaos. Mark notes:

I’ve been mashing up these ideas around order, chaos and complexity in a team sport context for a while now…

I have been thinking about these ideas too and this week’s alerts have been a timely reminder about their relevance and evidence of the growing community of practice around them.

This is a different epistemic environment now compared to my first foray in 1996. The challenge remains the same, I think: how do we share the story of complexity in sport settings without it being an abstract concept.

Hosting a conference at the Camp Nou is a great place to accept this opportunity.

A photograph of the entrance to the Camp Nou Experience at FC Barcelona taken by Andrew Booth.

Photo Credit

Camp Nou Tour (Andrew Booth, CC BY-ND 2.0)