Late last month, the National Research Council released a book entitled “Biometric Recognition: Challenges and Opportunities” that exposes the many difficulties with biometric identification systems. Popular culture has portrayed biometrics as nearly infallible, but it’s just not so, the report emphasizes. Especially at scale, biometrics will encounter a lot of challenges, from engineering problems to social and legal considerations.
“[N]o biometric characteristic, including DNA, is known to be capable of reliably correct individualization over the size of the world’s population,” the report says. (page 30) As with analog, in-person identification, biometrics produces a probabilistic identification (or exclusion), but not a certain one. Many biometrics change with time. Due to injury, illness, and other causes, a significant number of people do not have biometric characteristics like fingerprints and irises, requiring special accommodation.
At the scale often imagined for biometric systems, even a small number of false positives or false negatives (referred to in the report as false matches and false nonmatches) will produce considerable difficulties. “[F]alse alarms may consume large amounts of resources in situations where very few impostors exist in the system’s target population.” (page 45)
Consider a system that produces a false negative, excluding someone from access to a building, one time in a thousand. If there aren’t impostors attempting to defeat the biometric system on a regular basis, the managers of the system will quickly come to assume that the system is always mistaken when it produces a “nonmatch” and they will habituate to overruling the biometric system, rendering it impotent.
Context is everything. Biometric systems have to be engineered for particular usages, keeping the interests of the users and operators in mind, then tested and reviewed thoroughly to see if they are serving the purpose for which they’re intended. The report debunks the “magic wand” capability that has been imputed to biometrics: “[S]tating that a system is a biometric system or uses ‘biometrics’ does not provide much information about what the system is for or how difficult it is to successfully implement.” (page 60) Continue reading →
When it comes to theories about how to best raise kids, I’m a big believer in what might be referred to “a resiliency approach” to child-rearing. That is, instead of endlessly coddling our children and hovering over them like “helicopter parents,” as so many parents do today, I believe it makes more sense to instill some core values and common sense principles and then give them some breathing room to live life and learn lessons from it. Yes, that includes making mistakes. And, oh yes, your little darlings might actually gets some bump and bruises along the way — or at least have their egos bruised in the process. But this is how kids learn lessons and become responsible adults and citizens. Wrapping them in bubble wrap and filling their heads without nothing but fear about the outside would will ultimately lead to the opposite: sheltered, immature, irresponsible, and unprepared young adults — many of whom expect someone else (the government, their college, their employer, or still their parents!) to be there to take care of them well into their 20’s or even 30’s. Again, you gotta let kids live a little and learn from their experiences.
This explains why I find Lenore Skenazy’s new book,
Free-Range Kids: Giving Our Children the Freedom We Had Without Going Nuts with Worry
, to be such a breath of fresh air. [Here’s her blog of the same name.] She argues that “if we try to prevent every possible danger of difficult in our child’s everyday life, that child never gets a chance to grow up.” (p. 5) As she told
Salon recently:
You want kids to feel like the world isn’t so dangerous. You want to teach them how to cross the street safely. You want to teach them that you never go off with a stranger. You teach them what to do in an emergency, and then you assume that generally emergencies don’t happen, but they’re prepared if they do. Then, you let them go out.
The fun of childhood is not holding your mom’s hand. The fun of childhood is when you don’t have to hold your mom’s hand, when you’ve done something that you can feel proud of. To take all those possibilities away from our kids seems like saying: “I’m giving you the greatest gift of all, I’m giving you safety. Oh, and by the way I’m taking away your childhood and any sense of self-confidence or pride. I hope you don’t mind.”
Exactly right, in my opinion. Again, let kids live and learn from it. Teach lessons but then encourage ‘learning by doing’ and let them understand these things for themselves. That is resiliency theory in a nutshell.
Continue reading →