AP Isolation = isolate broadcast domain?

Well, there it is. Assuming that several wireless clients are connected on the same subnet, no VLANs, IPs assigned by DHCP and everyone is playing nice (no one is manually assigning an IP, trying to hack the WAP, do a DoS, etc.) does the "AP Isolation" function also isolate the broadcast domains? Or does the broadcast domain ignore the AP Isolation setting?

I would think it would, since the point of AP Isolation would be to ... isolate the hosts connected to each other. But, I didn't want...

AP Isolation = isolate broadcast domain?