She fails the Visitor empathy test - meaning, she's displaying the rudiments of human emotion. Unlike her mother, Lisa may have a heart. As we saw last week with Ryan, this could be the beginning of a conversion from loyal-to-Anna Visitor to V 5th columnist.
The V-doc who tells Lisa she failed the test is, of course, a 5th columnist himself. This raises the possibility that he's lying to Lisa, for the purpose of manipulating her into working against her mother, or who knows what else. But I don't think he's lying.
Lots of good action in this episode, including Father Jack shooting a human who's working with the Visitors, and two love scenes. One is between Chad and Anna, but it's in his dream. The other is between Lisa and Tyler - that's real.
Memo to FlashForward - you could use more scenes like those. One of the great strengths of V, in both its original 1980s and current renditions, is its non-abstract, visceral appeal.
See also V Returns to TV ... V 1.2: The Effects and The Characters ... V 1.3: Multiple Twists and Lizard Visions ... V 1.4: Good Medicine for Television ... V's Back in 1.5 ... V 1.6: Floating Witches ... V 1.7: Ryan's Story