1969 CES Televisions
Televisions are shown on display at the 1969 International CES. CEA/International CES

A study released this week revealed that almost half of Americans tune in to a second device while watching television.

The study was released at this week's International Consumer Electronics Show in Las Vegas by its promoter, the Consumer Electronics Association and the National Association of Television Program Executives (NATPE).

Here are some of the study's findings, via The Hollywood Reporter:

About 44 percent of Americans utilize another device while watching television, but among that group, only 13 percent say it makes the program-viewing experience "much more enjoyable." A significant 67 percent report that it makes their TV viewing "somewhat more enjoyable."

About 67 percent of those using a second screen while watching TV are searching for program-related content. And the most commonly used second-screen device is a smartphone. Those most likely to use their phones in this way are millennials (ages 13 to 34). Women are also more likely than men to be second-screen users.

Millennials are more likely to access Twitter for shows they are watching (22 percent) and mostly go to social network sites where they can interact with or track a community of other viewers.

About 91 percent of second-screen users seek out program-related content between episodes of a show and between seasons. About 64 percent access this kind of content at least once a month or more.