Sadie Dingfelder—Do I Know You? A Faceblind Reporter’s Journey into the Science of Sight, Memory, and Imagination

Cover of the book Do I Know You?: A Faceblind Reporter’s Journey into the Science of Sight, Memory, and Imagination by Sadie Dingfelder, showing the title and author’s name in shades of turquoise, red, and violet on a white background. The “O” in “Do” and “You” are elongated to mimic eyes and include a circle representing iris and pupil.

Do I Know You?


Sadie Dingfelder
Little, Brown & Co., Spark, June 25, 2024
Hardcover, $32, eBook, $15.99, audio book, $17.05
ISBN-10: 0316545147, ISBN-13: 978-0316545143
Audio book ASIN: B0CKNMC3MG

Dingfelder reports:

My book began as a funny "memoir in essays" in the style of David Sedaris. As I was working on these stories, I had a dawning awareness that I make a lot of weird mistakes. For instance, I once accosted a random man in a grocery store because I thought he was my husband.

Portrait photo of Sadie Dingfelder by Oxana Ware.

Sadie Dingfelder
Photo by Oxana Ware

Then I thought, "Wait, could I be faceblind?" This sent me down a rabbit hole where I discovered that I am, indeed, quite faceblind. But why? I found studies that supported my hunch that my prosopagnosia probably stems from the fact that my right hemisphere’s fusiform face area (FFA) did not get the early-life exposure to faces that it needed. One study I participated in at the Harvard lab of Joe DeGutis found that my FFA is too thick, which suggests that it did not get the neural pruning it needed.

I also discovered that I have aphantasia, which means that I cannot visualize. I actually did not realize that other people could sort-of hallucinate on demand. I participated in an fMRI study at the University of Chicago lab of Wilma Bainbridge that confirmed my self-report.

Finally, I found out that I have Severely Deficient Autobiographical Memory, which hinders how I store memories. Turns out my left hippocampus is slightly larger than my right hippocampus. Neurotypical brains generally show the opposite asymmetry. That study was done at the lab of Brian Levine at the Rotman Research Institute in Toronto.

I’d emailed book agents with my David Sedaris memoir-in-essays proposal, and they were not impressed. But when I emailed them a proposal for a science-memoir mashup about a nerdy midlife crisis that was already in progress they were into it.

I am fortunate, as a science writer, to be in possession of a brain weird enough to interest seven teams of researchers. I ended up spending more than 30 hours in MRI machines, including a 7-Tesla one that made me dizzy.

This book isn’t just about me, however. It’s about the new science of subjectivity and that scientists are taking inner experiences seriously for the first time in more than a century.

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Banner image adapted from original photo by Sadie Dingfelder.

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The path from idea to book may take myriad routes. The Advance Copy column, started in 2000 by NASW volunteer book editor Lynne Lamberg, features NASW authors telling the stories behind their books. Authors are asked to report how they got their idea, honed it into a proposal, found an agent and a publisher, funded and conducted their research, and organized their writing process. They also are asked to share what they wish they’d known when they started or would do differently next time, and what advice they can offer aspiring authors. Lamberg edits the authors’ answers to produce the Advance Copy reports.

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