diff --git a/frontend/src/components/MatchingPairs/MatchingPairs.tsx b/frontend/src/components/MatchingPairs/MatchingPairs.tsx
index 7e37ade79..53e99e8a9 100644
--- a/frontend/src/components/MatchingPairs/MatchingPairs.tsx
+++ b/frontend/src/components/MatchingPairs/MatchingPairs.tsx
@@ -50,6 +50,7 @@ const MatchingPairs = ({
     const [inBetweenTurns, setInBetweenTurns] = useState(false);
     const [score, setScore] = useState<number | null>(null);
     const [total, setTotal] = useState(bonusPoints);
+    const [startOfTurn, setStartOfTurn] = useState(performance.now());
 
     const columnCount = sections.length > 6 ? 4 : 3;
 
@@ -117,14 +118,11 @@ const MatchingPairs = ({
                 currentCard.boardposition = index + 1;
                 currentCard.timestamp = performance.now();
 
-                const firstCardTimestamp = firstCard?.timestamp ?? 0;
-                currentCard.response_interval_ms = Math.round(currentCard.timestamp - firstCardTimestamp);
-
                 // check for match
                 const first_card = firstCard;
                 const second_card = currentCard;
                 try {
-                    const scoreResponse = await scoreIntermediateResult({ session, participant, result: { first_card, second_card } });
+                    const scoreResponse = await scoreIntermediateResult({ session, participant, result: { "start_of_turn": startOfTurn, first_card, second_card } });
                     if (!scoreResponse) {
                         throw new Error('We cannot currently proceed with the game. Try again later');
                     }
@@ -142,8 +140,6 @@ const MatchingPairs = ({
                 currentCard.noevents = true;
                 currentCard.boardposition = index + 1;
                 currentCard.timestamp = performance.now();
-                // reset response interval in case this card has a value from a previous turn
-                currentCard.response_interval_ms = '';
                 // clear feedback text
                 setFeedbackText('');
             }
@@ -152,6 +148,7 @@ const MatchingPairs = ({
     };
 
     const finishTurn = () => {
+        setStartOfTurn(performance.now());
         finishedPlaying();
         // remove matched cards from the board
         if (score === 10 || score === 20) {