Before Knox took the stand today, her father spoke with reporters about the pressure she faced in testifying.
"It's going to be probably a very long day, but based on the conversation we just had with her, I think she's feeling confident and relaxed, so that's good," Curt Knox said.
The decision to take the stand was Knox's and that of her lawyers. Sollecito did not plan to testify.
Xavier Amador, a Columbia University clinical psychology professor who frequently consults on criminal trials, suggested that Knox faces a unique problem with the jury in Perugia.
He noted that the Italian media have written luridly about Knox's behavior after her arrest and during the trial, and that Italian jurors are not screened for biases or preconceived notions, and are not told to avoid reading about the case as they are in the United States.
"I would have a difficult time trusting that jurors with long breaks between hearings and, and evidentiary hearings where they have access to the media, especially in a high-profile case, are not reading news accounts," Amador told ABC News.
Amanda Knox's family members say they worry about media portrayal of their daughter as a calculating and conniving killer, dubbed the "angel face with icy blue eyes." For a year and a half, the international press has painted Knox as a person her father says is "180 degrees from who she really is."
He says that with his daughter on the stand, speaking in her own words, "I think people are going to see that she's a real human being, not the monster she has been pictured and painted as."