1. How do the respondents arrive at their answers? Do they compute/count/estimate the number of servings?
When answering the question, all test persons proceeded in such a way that they retrospectively remembered their eating behaviour and counted or roughly estimated the amount of fruit or vegetables they consumed on a typical day:
But the cognitive interviews also brought to light problems with the question. Several test persons reported exclusively on their fruit consumption and either left out their vegetable consumption or only included it in their answers when asked by the interviewer. This could be due to the wording "fruits or vegetables" in the question, which could be interpreted as meaning that respondents should report either their fruit or vegetable consumption, depending on what they consume more frequently:
Furthermore, the definition of a serving of fruits or vegetables led to misunderstandings among two test persons (TP 06, 08). They interpreted the definition to mean that a serving refers to "half" an apple or "half" a banana instead of a medium-sized:
Finally, test person 07 pointed out that question 3 could not be answered for persons who had not answered "daily" in question 2, as there was no "typical day" for them in relation to their fruit and vegetable consumption:"Well, I don't eat this every day. As I said, three or four times a week. This is in contradiction to the previous question. [...] [If I break it down to one day], then I would say: half an apple a day. But as I said, the two questions are a bit contradictory."
2. What kind of fruits and vegetables were the respondents thinking about?
As already described in the previous section, several test persons thought exclusively about their fruit consumption and left their vegetable consumption out of the equation when answering the question.
When asked, all respondents stated that they had thought about fresh fruit or vegetables when answering the question. Occasionally, frozen fruit or vegetables (TP 01, 03), dried fruit or vegetables (TP 03, 08) and juices or smoothies (TP 02) were also included in the answer.
3. How do respondents interpret the terms “starchy roots” and “cassava”?
The test persons associated the term "starchy roots" primarily with potatoes and occasionally also with the two other vegetables mentioned in the question (sweet potatoes, cassava):
Six test persons claimed having already heard the term cassava, five of whom were able to explain the term in more detail: