From d43aaecf67a6353af1509e7446a3fa54adbb8ff8 Mon Sep 17 00:00:00 2001
From: Anirudh Pai <anirudhnpai@gmail.com>
Date: Fri, 7 Jun 2024 19:50:41 -0700
Subject: [PATCH] Revert "Update BKT-brain.js"

This reverts commit 3315debb2a076c376fcfa36d657ca46d077753c8.
---
 src/models/BKT/BKT-brain.js | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/src/models/BKT/BKT-brain.js b/src/models/BKT/BKT-brain.js
index 8744fcf30a5..1132ee4e74d 100644
--- a/src/models/BKT/BKT-brain.js
+++ b/src/models/BKT/BKT-brain.js
@@ -1,6 +1,6 @@
 export default function update(model, isCorrect) {
-    let numerator, masteryAndGuess, probMasteryGivenObservation;
-
+    let numerator;
+    let masteryAndGuess;
     if (isCorrect) {
         numerator = model.probMastery * (1 - model.probSlip);
         masteryAndGuess = (1 - model.probMastery) * model.probGuess;
@@ -9,11 +9,6 @@ export default function update(model, isCorrect) {
         masteryAndGuess = (1 - model.probMastery) * (1 - model.probGuess);
     }
 
-    probMasteryGivenObservation = numerator / (numerator + masteryAndGuess);
-
-    let adjustment = (probMasteryGivenObservation - model.probMastery) * model.probTransit;
-
-    model.probMastery += adjustment;
-
-    model.probMastery = Math.max(0, Math.min(1, model.probMastery));
+    let probMasteryGivenObservation = numerator / (numerator + masteryAndGuess);
+    model.probMastery = probMasteryGivenObservation + ((1 - probMasteryGivenObservation) * model.probTransit);
 }