Aphantasia

Interest in the phenomenon renewed after the publication of a study in 2015 conducted by a team led by Professor Adam Zeman of the University of Exeter,[3] which also coined the term aphantasia. [10]

In December 2017, the book Aphantasia: Experiences, Perceptions, and Insights was published by Alan Kendle with a foreword by Professor Adam Zeman. [5][6]

In the original paper[3] by Professor Adam Zeman, the Vividness of Visual Imagery Questionnaire (VVIQ) is used to evaluate the quality of the mental image.

Source: en.wikipedia.org