 Harriet Hall has written critically about SPECT scans in articles for Quackwatch and for the "Science-Based Medicine" website.Hall accuses the clinics of misrepresenting an unproven treatment as effective, of concealing important warning information, and of creating false hopes by promising things that can't be done.She dismisses the scans as "pretty pictures" and says that although Amen himself seems to believe in his approach, "humans are very good at fooling themselves".