Driven to Distraction -- and Then Off the Road

Scott LaFee on Feb 25, 2026

Once, when automobile dashboards were festooned with knobs and dials, it was relatively easy and safe to "feel" your way to the right control without taking your eyes off the road. Dashboard touch screens have changed that -- and it's not a pretty picture.

In a study using vehicle simulators, participant "drivers" were tasked with navigating streets while interacting with a touch screen and completing memory tests that mimic the mental effort demanded by traffic conditions and other distractions.

Researchers found that when people multitasked, their driving and touch screen use both suffered. Cars drifted more in the lane when people used touch screens, and speed and accuracy of screen use declined when driving. Everything got worse when a memory task was added.

Increasing the size of the target areas on touch screens did not improve performance.

"If people struggle with accuracy on a screen, usually you want to make bigger buttons," said study author Xiyuan Alan Shen at the University of Washington. "But in this case, since people move their hand to the screen before touching, the thing that takes time is the visual search."

The researchers suggested that future in-car touch screen systems might use simple sensors in the car, such as eye tracking or touch sensors on the steering wheel, to monitor drivers' attention and cognitive load. Based on these readings, the car's system might adjust the touch screen's interface to make important controls more prominent and safer to access.

Body of Knowledge

A full bladder is roughly the size of a softball.

Doc Talk

Cubital fossa: The crease of the elbow

Mania of the Week

Sophomania: A delusion of having superior intelligence or being exceptionally wise. "Sopho" derives from the Greek word for wisdom, "mania" from the Greek word for madness. Asked about his wisdom, Socrates once said, "I know that I do not know," a wise answer.

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Best Medicine

Patient: "Doctor, I think I'm suffering from memory loss."

Doctor: "Have you ever had it before?"

Observation

"Ordinarily he was insane, but he had lucid moments when he was merely stupid." -- German poet and literary critic Heinrich Heine (1797-1856)

Medical History

This week in 1878, the French scientist Charles-Emmanuel Sedillot corresponded with Emile Littre concerning certain microorganisms and a suitable word to name them. Littre replied in a letter, suggesting the word "microbe" rather than "microbia," even though it was coined from two Greek words that together would mean "short-lived" rather than "small life." The word stuck.

Ig Nobel Apprised

The Ig Nobel Prizes celebrate achievements that make people laugh, then think. A look at real science that's hard to take seriously and even harder to ignore.

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Self-Exam

Q: What is the medical term for generally not feeling well?

a) Asthenia

b) Malaise

c) Indisposition

d) S#&!

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Curtain Calls

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