She asked for his address and got him to agree to a face-to-face interview.
The findings were based on 60,643 face-to-face interviews with adults in 14 countries.
"We're not doing away with face-to-face interviews, but they come later in the process," he said.
These visits involve face-to-face interviews with students from the university.
Many beneficiaries cannot make it to the required face-to-face interview because they are working.
Of that 20 percent, about half will probably get a face-to-face interview.
The decision that must be made is between a postal questionnaire and some form of face-to-face interview.
It is also worth drawing up a detailed list of questions to ask at a face-to-face interview.
For years now, he has refused to do face-to-face interviews.
The survey for the latest study was carried out in May by face-to-face interviews.