How Smartphones and Apps Are Changing How Much We Actually Talk to Each Other

Researchers at the University of Missouri-Kansas City and the University of Arizona have found something striking: the average person speaks far fewer words aloud to other people than they did fifteen years ago. Between 2005 and 2019, daily spoken word counts fell by about 28 percent—from roughly 16,600 words a day to 11,900. The research synthesized data from 22 studies involving over 2,000 participants who wore small audio recorders that captured snippets of their everyday conversations.

The decline follows a consistent pattern. Every year, the average person loses about 338 spoken words per day. The drop is steeper among younger people: those under 25 are losing about 451 words daily each year, while those over 25 are losing 314.

How They Measured It

The studies used a technology called the Electronically Activated Recorder (EAR)—essentially a small device that captures brief audio samples throughout the day. This approach is more reliable than asking people to remember how much they talked, which tends to be inaccurate. The 14-year timespan also matters: it covers the exact years when smartphones took off, messaging apps exploded, and apps started replacing store workers and cashiers.

What's Actually Happening

The researchers point to three main shifts. First, apps have replaced the spoken conversation you used to have at the counter—ordering food, asking questions, handling complaints. Second, text messages and messaging apps like WhatsApp have taken the place of phone calls for everyday coordination ("I'll be there at 5" used to be a quick call; now it's a text). Third, time spent on social media, videos, and other online content is time not spent talking face-to-face.

This doesn't mean people are communicating less overall. They're using different channels. Text-based digital communication has exploded during the same period. The challenge is that it's hard to count words in digital messages the same way researchers counted spoken words.

Why This Matters at Work

Companies now rely heavily on tools like Slack, Microsoft Teams, and Zoom for collaboration. The data suggest this shift toward typed communication at work is probably bigger than anyone realized. Remote work, which boomed during COVID but was already growing during the study period, likely pushed this trend further.

The age differences matter here too. Younger employees, who grew up texting and messaging, are less likely to pick up the phone than older colleagues. When companies design how teams collaborate, they may need to account for the fact that younger workers prefer written communication for tasks that their predecessors would have handled with a quick phone call.

A Familiar Pattern

This isn't the first time technology has reshaped how we communicate. The telephone itself reduced face-to-face talking while creating a new way to connect across distance. Email and early internet chat did something similar—they pulled conversation volume away from phone calls.

I noticed this firsthand with my own kids. My daughter got a smartphone in middle school around 2012 and coordinated her social life almost entirely through texting. My son, who came of age a few years earlier, naturally used phone calls for the same tasks. The shift wasn't dramatic—it happened inside a few years, and it was complete.

Downstream Effects

This trend affects the infrastructure underneath communication. Phone networks have lots of unused capacity now because voice calls are declining. Meanwhile, data networks are packed with traffic from messaging apps. It also affects how speech recognition systems are trained. If fewer young people are speaking on phones, the voices that train AI voice assistants and transcription tools may not be fully representative of how people actually sound in modern conversation.

What Happens Next

The question is whether new technologies might reverse some of this decline. Voice assistants like Alexa and Siri create new reasons to speak aloud. So do conversational AI systems. But talking to a machine is quite different from talking to another person, and it's unclear whether it will meaningfully offset the shift away from human-to-human speech.

For organizations building communication systems, the practical challenge is clear: younger workers are going to prefer typing to talking. The most effective approach probably involves tools that let people choose whether to speak or type—Slack with voice messages, Teams with video calls alongside chat, systems that work both ways.

The research gives us a baseline. As AI becomes better at conversation and as virtual reality creates new contexts for talking, tracking how much people actually speak to each other will help us understand whether we're just using different channels or whether something deeper is changing about human interaction itself.