For more than thirty years, Lindamood-Bell co-founder Nanci Bell has been working to educate parents, education professionals, and researchers about what she identified as concept imagery ability.
Published in 1986, her book Visualizing and Verbalizing for Language Comprehension and Thinking discusses concept imagery ability, and concept imagery weakness, a condition that scientists are recently terming aphantasia.
Visualizing and Verbalizing details how to recognize symptoms of concept imagery weakness, and describes how to teach people who have the condition how to make mental images.
Researchers from the University of Exeter in England studied the condition. Click below to watch the BBC report.