BEVERLY HILLS, California (AP) ― The “social experiment” that is the CBS television show,’ “Big Brother,” included appalling behavior this season but the network has responded appropriately, CBS Corp. CEO Les Moonves said Monday.

Contestants have been caught on the reality show’s 24-hour-a-day Internet feed making boorish and racially insensitive remarks, and some were aired on one of the show’s TV episodes.

“What you see there ... unfortunately is reflective of how certain people feel in America. It’s what our show is. I think we’ve handled it properly,” Moonves told the Television Critics Association.

The executive has a unique connection to the series: His wife, Julie Chen, is the host, and Moonves said he makes a point of watching each episode. The network responded when racially oriented comments became an issue with the contestants, he said.

In the online feed, contestant GinaMarie Zimmerman, 32, of Staten Island, New York, used a derogatory racial epithet to describe welfare as “insurance” for black people.

Another incident involving Zimmerman was part of the TV show. In an exchange with contestant Aaryn Gries of San Angelo, Texas, Zimmerman said a black house member is “on the dark side, but she’s already dark.” Gries responded, “Be careful what you say in the dark because you might not be able to see the bitch.”

A network disclaimer that was shown on screen read, in part, “At times, the Houseguests may reveal prejudices and other beliefs that CBS does not condone” and which do not represent the network’s views or opinions.

Broadcast television’s infatuation with the reality genre, which is both popular and can be cheaper to produce than scripted series, has made it an entrenched part of network schedules. But its pitfalls can include the contestants and their on- or off-screen behavior.

At the dawn of the reality cycle, Fox’s “Who Wants to Marry a Multi-Millionaire” drew scrutiny in 2000 over the financial and personal credentials of its centerpiece, Rick Rockwell. “American Idol” has jettisoned contestants who failed to disclose arrest records or have other issues.

Some critics have questioned how real much of reality TV is, given factors including casting and editing that are part of the quest for ratings.

“Big Brother,” which gathers contestants in a house to live under the gaze of cameras as they compete to be the last one left, was established as a social experiment when it began airing, and “clearly that’s what’s happening this year,” Moonves said. The series, which debuted in 2000, is based on a Dutch show.

While he finds some of the behavior “absolutely appalling,” Moonves said, “it’s what our show is.”