If a person is describing something that they have seen or heard, then their eyes should primarily move to visual or auditory remembered. However if a person is making something up, then their eyes will tend to move to visual or auditory constructed, indicating that the person is constructing some part of the situation they are describing. This may indicate that the person is uncertain or untruthful about what they are thinking.

Be careful assuming someone is untruthful. For example, suppose you asked me a question about something that I had never thought about before. To formulate an answer, I may have to look at or hear one or more pieces of true information in a way that I had never done so before. In this situation, I would be constructing an answer and my eyes would most likely move to visual or auditory constructed.