diff --git a/js/data/TrialHandler.js b/js/data/TrialHandler.js
index 314efcb..6efb1ad 100644
--- a/js/data/TrialHandler.js
+++ b/js/data/TrialHandler.js
@@ -473,11 +473,15 @@ export class TrialHandler extends PsychObject
 							value = Number.parseFloat(value);
 						}
 
-						const [arrayMaybe] = util.turnSquareBracketsIntoArrays(value);
+						// Look for string encoded arrays in the form of '[1, 2]'
+						const arrayMaybe = util.turnSquareBracketsIntoArrays(value);
 
 						if (Array.isArray(arrayMaybe))
 						{
-							value = arrayMaybe;
+							// Keep the first match if more than one are found. If the
+							// input string looked like '[1, 2][3, 4]' for example,
+							// the resulting value would be [1, 2]
+							value = arrayMaybe[0];
 						}
 
 						trial[fields[l]] = value;