Think you know how slot machines work? There’s a lot more to it than just pushing a button and hearing the clink of coins.

Thanks to some complicated algorithms and talented behavioral scientists, slot machines are now big business, bringing in 75 to 85 percent of casino revenues. Innovation Hub explains:

“Inside, they’re absolutely different creatures [than they were], and they can give you an absolutely different experience playing,” says Natasha Dow Schull, a cultural anthropologist at MIT and author of “Addiction by Design: Machine Gambling in Las Vegas.”