Think Again

the more psychological safety
: William A. Kahn, “Psychological Conditions of Personal
Engagement and Disengagement at Work,” Academy of Management Journal 33 (1990): 692–
724.
What mattered most was psychological safety
: Julia Rozovsky, “The Five Keys to a Successful
Google Team,” re:Work, November 17, 2015, 
rework.withgoogle.com/blog/five-keys-to-a-
successful-google-team
.
psychological safety is not
: Amy C. Edmondson, “How Fearless Organizations Succeed,”
strategy+business, November 14, 2018, 
www.strategy-business.com/article/How-Fearless-
Organizations-Succeed
.
foundation of a learning culture
: Amy Edmondson, “Psychological Safety and Learning Behavior
in Work Teams,” Administrative Science Quarterly 44 (1999): 350–83.
engage in self-limiting behavior
: Paul W. Mulvey, John F. Veiga, and Priscilla M. Elsass, “When
Teammates Raise a White Flag,” Academy of Management Perspectives 10 (1996): 40–49.
some engineers did raise red flags
: Howard Berkes, “30 Years after Explosion, Challenger
Engineer Still Blames Himself,” NPR, January 28, 2016, 
www.npr.org/sections/thetwo-
way/2016/01/28/464744781/30-years-after-disaster-challenger-engineer-still-blames-himself
.
an engineer asked for clearer photographs
: Joel Bach, “Engineer Sounded Warnings for
Columbia,” ABC News, January 7, 2006, 
abcnews.go.com/Technology/story?id=97600&page=1
.
prevent this kind of disaster from ever happening again
: Personal interview with Ellen Ochoa,
December 12, 2019.
How do you know?
: Personal interview with Chris Hansen, November 12, 2019.
gains in psychological safety a full year later
: Constantinos G. V. Coutifaris and Adam M. Grant,
“Taking Your Team Behind the Curtain: The Effects of Leader Feedback-Sharing, Feedback-
Seeking, and Humility on Team Psychological Safety Over Time” (working paper, 2020).