Americans continued to feel confident about the economy this month, a good sign for consumer spending and economic growth.

The Conference Board, a business research group, says its consumer confidence index rose to 125.4 in January from a revised 123.1 in December.

The business research group's index measures consumers' assessment of current conditions and their outlook for the next six months. Their view of today's conditions slipped slightly, but their expectations for the future rose.

Economists watch the Conference Board report closely because consumer spending accounts for about 70 percent of U.S. economic output.

"Consumers remain quite confident that the solid pace of growth seen in late 2017 will continue into 2018," said Lynn Franco, the Conference Board's director of economic indicators.