Hands-Free Siri Interactions Result in Highest Levels of Mental Distraction While Driving

Used as an in-car hands-free system, Siri causes a high level of mental distraction while driving, according to research conducted by the AAA Foundation for Traffic Safety. In a thorough study [PDF] that measured the cognitive workload of 45 drivers completing in-car tasks using various voice-based technologies, Siri's high complexity and low intuitiveness resulted in some of the highest levels of mental distraction.

Using a five-category rating system, researchers measured Siri-based interactions like sending and receiving text messages and emails, updating Facebook or Twitter, and modifying calendar appointments. Various measurements to record distraction were taken during three separate experiments, in-car on residential streets, without driving, and in a driving simulator.

siridistractiondrivingtest
Researchers tested Siri on an iPhone 5 with iOS 7, using a microphone and voice commands to make the setup both hands-free and eyes-free, with drivers unable to look at or make contact with the phone.

Siri was found to produce the highest mental workload on the researchers' scale, and use of Siri in a car even resulted in two crashes during the simulator study. It was also given the lowest rating of intuitiveness along with the highest rating of complexity, due to its lack of consistency and its inflexibility when it came to voice commands.

mentaldistractionlevels

Common issues involved inconsistencies in which Siri would produce different responses to seemingly identical commands. In other circumstances, Siri required exact phrases to accomplish specific tasks, and subtle deviations from that phrasing would result in a failure.

When there was a failure to properly dictate a message, it required starting over since there was no way to modify/edit a message or command. Siri also made mistakes such as calling someone other than the desired person from the phone contact list. Some participants also reported frustration with Siri's occasional sarcasm and wit.

According to the researchers, interactions with Siri may improve over time as the voice assistant is able to learn accents and other characteristics of a user's voice, but many commands resulted in overly complex interactions that could be fixed via "improvements to the software design."

Though the AAA study looked at the distraction level when using Siri directly on an iPhone, it did not look at CarPlay, Apple's new in-dash system that the company says is a "smarter, safer way to use your iPhone in the car." Other similar in-dash systems did, however, result in high levels of cognitive workload in a companion study, but cognitive demand varied highly based on the number of comprehension errors and the number of steps required to complete an action.

Early CarPlay reviews have suggested that the system's Siri integration is improved compared to Siri on the iPhone, as it was judged to be easy to use with simple menus and navigation.

The study comes ahead of a set of voluntary guidelines the AAA is planning to create, encouraging users to minimize their cognitive distraction by cutting back on the use of voice-based technologies while driving. According to the AAA, voice-based interactions within a vehicle result in "significant impairments" to driving that may "adversely affect traffic safety."

Related Roundup: CarPlay

Top Rated Comments

verniesgarden Avatar
123 months ago
lesson is, put your phone away and drive
Score: 67 Votes (Like | Disagree)
troop231 Avatar
123 months ago
But if Siri drove the car...
...while using Apple Maps :eek:
Score: 33 Votes (Like | Disagree)
ChazSch Avatar
123 months ago
Researchers tested Siri on an iPhone 5 with iOS 7...
well there is your problem. Was the applicant FAMILIAR with Siri?

once you get her, she is easy. This was probably a first time user
Score: 28 Votes (Like | Disagree)
jontech Avatar
123 months ago
Agreed.


Inconstancy in Siri is maddening
Score: 28 Votes (Like | Disagree)
napabar Avatar
123 months ago
i turned off siri as soon as i took my phone out of its packaging.

its gimmicky garbage and we dont have the technology (yet) for it to actually be accurate and useful. Also dont want Apple recording and storing my voice

Don't forget to put tin foil on your head.

:rolleyes:
Score: 24 Votes (Like | Disagree)
FrizzleFryBen Avatar
123 months ago
I prefer people don't even talk on the phone while driving (even bluetooth)... no matter what you say, it's an unnecessary distraction.

On a normal day, I would say 80-90% of people driving like complete idiots are on their phone in one way shape or form. (usually talking)
Score: 23 Votes (Like | Disagree)

Popular Stories

iPhone 16 Camera Lozenge 2 Perspective Gray

Five Key Upgrades Coming to iPhone 16

Friday March 15, 2024 1:45 pm PDT by
The iPhone is Apple's top-selling product, and it gets an update every year. In 2024, we're expecting the iPhone 16 and iPhone 16 Pro lineup, with an arguably more interesting feature set than we got with the iPhone 15 and iPhone 15 Pro. Subscribe to the MacRumors YouTube channel for more videos. Capture Button All four iPhone 16 models are set to get a whole new button, which will be...
When To Expect New iPads Feature 1

Apple to Announce New iPads on March 26, Rumors Claim

Monday March 18, 2024 4:02 am PDT by
Apple is widely expected to release new iPad Air and OLED iPad Pro models in the next few weeks. According to new rumors coming out of Asia, the company will announce its new iPads on Tuesday, March 26. Chinese leaker Instant Digital on Weibo this morning 日发布%23">claimed that the date will see some sort of announcement from Apple related to new iPads, but stopped short of calling it an...
airpods 3 orange

Two New AirPods 4 Models Expected to Launch in September or October

Sunday March 17, 2024 7:56 am PDT by
Apple suppliers will begin production of two new fourth-generation AirPods models in May, according to Bloomberg's Mark Gurman. Based on this production timeframe, he expects the headphones to be released in September or October. Gurman expects both fourth-generation AirPods models to feature a new design with better fit, improved sound quality, and an updated charging case with a USB-C...
iphone se 4 modified flag edges

iPhone SE 4 Expected to Depreciate Heavily

Tuesday March 12, 2024 9:04 am PDT by
Resale value trends suggest the iPhone SE 4 may not hold its value as well as Apple's flagship models, according to SellCell. According to the report, Apple's iPhone SE models have historically depreciated much more rapidly than the company's more premium offerings. The third-generation iPhone SE, which launched in March 2022, experienced a significant drop in resale value, losing 42.6%...
General iOS 17 Feature Orange Purple

iOS 17.4.1 Update for iPhone is Imminent

Monday March 18, 2024 5:27 am PDT by
iOS 17.4.1 and iPadOS 17.4.1 should be released within the next few days, with a build number of 21E235, according to a source with a proven track record. MacRumors previously reported that Apple was internally testing iOS 17.4.1. As a minor update for the iPhone, it will likely address software bugs and/or security vulnerabilities. It is unclear if the update will include any other changes. ...
M3 iPad Feature 3

New iPads Likely to Begin Shipping in April

Monday March 18, 2024 9:52 am PDT by
Apple's new iPad Pro models with OLED displays will likely begin shipping to customers in April, according to information shared today by Ross Young, CEO of display industry research firm Display Supply Chain Consultants. Bloomberg's Mark Gurman also said the new iPad Pro models might not ship until "deeper" into April in his Power On newsletter on Sunday:I've repeatedly said that new...
iOS 17 Passkey With Apple ACCOUNT Feature

'Apple ID' Expected to Change to 'Apple Account' Starting With iOS 18

Sunday March 17, 2024 7:13 am PDT by
MacRumors was first to report that Apple was planning to rebrand "Apple ID" to "Apple Account" across its software platforms and websites like iCloud.com as early as this year, and now Bloomberg's Mark Gurman has corroborated this change. A mockup of the new Apple Account branding In his Power On newsletter today, Gurman said the new "Apple Account" branding will start to be used later this...