diff --git a/pub/proposal/proposal.pdf b/pub/proposal/proposal.pdf
index b69806a..8541239 100644
Binary files a/pub/proposal/proposal.pdf and b/pub/proposal/proposal.pdf differ
diff --git a/pub/proposal/proposal.tex b/pub/proposal/proposal.tex
index e835dbb..4d63327 100644
--- a/pub/proposal/proposal.tex
+++ b/pub/proposal/proposal.tex
@@ -174,6 +174,15 @@ the checklist.
     & \textbf{Reason:} Checklist designer from Boeing is interviewed
     where they go through the vital design choices to make them effective
     and how they gain pilots' trust to use checklists. \\
+
+    \multirow{2}{*}{\parbox{8em}{Intraindividual Variability in Basic Reaction Time Predicts Middle-Aged and Older Pilots’ Flight Simulator Performance~\cite{pilot-reaction}}}
+    & \textbf{Description:} Tested 236 pilots aged between 40-69 years old, 
+    to measure their reaction times and how they are affected 
+    by age. The tests were conducted by Stanford
+    University and MIRECC, and results have been peer reviewed. \\
+    & \textbf{Reason:} Gives insightful statistics into pilots 
+    reaction times and how they will affect the performance 
+    when carrying out procedures in checklists. \\
 \end{xltabular}
 
 % Aim (or hypothesis) and Objectives
diff --git a/pub/proposal/references.bib b/pub/proposal/references.bib
index 6f5823c..8bf6e6b 100644
--- a/pub/proposal/references.bib
+++ b/pub/proposal/references.bib
@@ -48,3 +48,21 @@
   isbn = {9781846683145},
 }
 
+@article{pilot-reaction,
+  author = {Kennedy, Quinn and Taylor, Joy and Heraldez, Daniel and Noda, Art
+            and Lazzeroni, Laura C. and Yesavage, Jerome},
+  title = {Intraindividual Variability in Basic Reaction Time Predicts
+           Middle-Aged and Older Pilots’ Flight Simulator Performance},
+  journal = {The Journals of Gerontology: Series B},
+  volume = {68},
+  number = {4},
+  pages = {487-494},
+  year = {2012},
+  month = {10},
+  issn = {1079-5014},
+  doi = {10.1093/geronb/gbs090},
+  eprint = {
+            https://academic.oup.com/psychsocgerontology/article-pdf/68/4/487/1520662/gbs090.pdf
+            },
+}
+