diff --git a/scroll-text-legacy-browsers.js b/scroll-text-legacy-browsers.js
index fccbd36d067c7aee8674df232cc6eef311b61932..373262abe0af163a94c84e1ebfe4a2c2a4ff9504 100644
--- a/scroll-text-legacy-browsers.js
+++ b/scroll-text-legacy-browsers.js
@@ -367,7 +367,8 @@ function trialRoutineEachFrame(snapshot) {
                     dragging = 1;
                     mouseY = mouse.getPos()[1];
                 } else {
-                    scroll += ((mouse.getPos()[1] - mouseY) / 1.08);
+                    scroll += (((mouse.getPos()[1] - mouseY) / fontSize) / 1.08);
+                    mouseY = mouse.getPos()[1];
                     moving = 1;
                 }
             } else {
diff --git a/scroll-text.js b/scroll-text.js
index eb016fb4812720d433d23d7b19c6d0f7aa7c9f4f..c24cac9aef86457a0f239153c1c00063d526a2a6 100644
--- a/scroll-text.js
+++ b/scroll-text.js
@@ -376,7 +376,8 @@ function trialRoutineEachFrame(snapshot) {
                     dragging = 1;
                     mouseY = mouse.getPos()[1];
                 } else {
-                    scroll += ((mouse.getPos()[1] - mouseY) / 1.08);
+                    scroll += (((mouse.getPos()[1] - mouseY) / fontSize) / 1.08);
+                    mouseY = mouse.getPos()[1];
                     moving = 1;
                 }
             } else {
diff --git a/scroll-text.psyexp b/scroll-text.psyexp
index bea34a3d7313a7e52bf45905344e7cfdf803a7cc..94bc3c5a61c029ea0c08a97092f1049b66b4ccad 100644
--- a/scroll-text.psyexp
+++ b/scroll-text.psyexp
@@ -79,8 +79,8 @@
         <Param name="Begin JS Routine" updates="constant" val="scroll = 0;&amp;#10;lines = scrollText.text.split(&quot;\n&quot;);&amp;#10;maxScroll = 0;&amp;#10;for (var line, _pj_c = 0, _pj_a = lines, _pj_b = _pj_a.length; (_pj_c &lt; _pj_b); _pj_c += 1) {&amp;#10;    line = _pj_a[_pj_c];&amp;#10;    maxScroll += Math.ceil(((line.length * fontSize) / screenRatio));&amp;#10;}&amp;#10;maxScroll -= (round((1.6 / fontSize)) - 1);&amp;#10;viewAll = 0;&amp;#10;dragging = 0;&amp;#10;moving = 0;&amp;#10;" valType="extendedCode"/>
         <Param name="Begin Routine" updates="constant" val="scroll = 0&amp;#10;lines = scrollText.text.split('\n')&amp;#10;maxScroll = 0&amp;#10;for line in lines:&amp;#10;    maxScroll += math.ceil(len(line)*fontSize/screenRatio)&amp;#10;&amp;#10;maxScroll-=round(1.6/fontSize)-1&amp;#10;viewAll=0&amp;#10;dragging=0&amp;#10;moving=0" valType="extendedCode"/>
         <Param name="Code Type" updates="None" val="Auto-&gt;JS" valType="str"/>
-        <Param name="Each Frame" updates="constant" val="keys=event.getKeys()&amp;#10;if len(keys):&amp;#10;    if viewAll==1 and 'space' in keys:&amp;#10;        continueRoutine=False&amp;#10;    elif 'down' in keys:&amp;#10;        scroll+=1&amp;#10;        moving=1&amp;#10;    elif 'up' in keys:&amp;#10;        scroll-=1&amp;#10;        moving=1&amp;#10;elif mouse.isPressedIn(scrollBar):&amp;#10;    mouseY=mouse.getPos()[1]&amp;#10;    scroll = (trackLength/2-mouseY)*maxScroll/trackLength&amp;#10;    moving=1&amp;#10;elif mouse.getPressed()[0] == 1:&amp;#10;    if dragging==0:&amp;#10;        dragging=1&amp;#10;        mouseY=mouse.getPos()[1]&amp;#10;    else:&amp;#10;        scroll+=(mouse.getPos()[1]-mouseY)/1.08&amp;#10;        moving=1&amp;#10;elif dragging==1:&amp;#10;    dragging=0&amp;#10;if moving==1:&amp;#10;    if scroll&gt;=maxScroll:&amp;#10;        scroll=maxScroll&amp;#10;        if viewAll == 0:&amp;#10;            viewAll=1&amp;#10;            continueText.text='Press space to continue'        &amp;#10;    scrollText.setPos((-.45*screenRatio, .45+scroll*fontSize*1.08))&amp;#10;    scrollButton.setPos((screenRatio*.475, trackLength/2-trackLength*scroll/maxScroll))&amp;#10;    bottomCrop.setPos((-.1+.01*(scroll%2), -.475))&amp;#10;    continueText.setOpacity(1-.01*(scroll%2))&amp;#10;    moving=0" valType="extendedCode"/>
-        <Param name="Each JS Frame" updates="constant" val="var _pj;&amp;#10;function _pj_snippets(container) {&amp;#10;    function in_es6(left, right) {&amp;#10;        if (((right instanceof Array) || ((typeof right) === &quot;string&quot;))) {&amp;#10;            return (right.indexOf(left) &gt; (- 1));&amp;#10;        } else {&amp;#10;            if (((right instanceof Map) || (right instanceof Set) || (right instanceof WeakMap) || (right instanceof WeakSet))) {&amp;#10;                return right.has(left);&amp;#10;            } else {&amp;#10;                return (left in right);&amp;#10;            }&amp;#10;        }&amp;#10;    }&amp;#10;    container[&quot;in_es6&quot;] = in_es6;&amp;#10;    return container;&amp;#10;}&amp;#10;_pj = {};&amp;#10;_pj_snippets(_pj);&amp;#10;keys = event.getKeys();&amp;#10;if (keys.length) {&amp;#10;    if (((viewAll === 1) &amp;&amp; _pj.in_es6(&quot;space&quot;, keys))) {&amp;#10;        continueRoutine = false;&amp;#10;    } else {&amp;#10;        if (_pj.in_es6(&quot;down&quot;, keys)) {&amp;#10;            scroll += 1;&amp;#10;            moving = 1;&amp;#10;        } else {&amp;#10;            if (_pj.in_es6(&quot;up&quot;, keys)) {&amp;#10;                scroll -= 1;&amp;#10;                moving = 1;&amp;#10;            }&amp;#10;        }&amp;#10;    }&amp;#10;} else {&amp;#10;    if (mouse.isPressedIn(scrollBar)) {&amp;#10;        mouseY = mouse.getPos()[1];&amp;#10;        scroll = ((((trackLength / 2) - mouseY) * maxScroll) / trackLength);&amp;#10;        moving = 1;&amp;#10;    } else {&amp;#10;        if ((mouse.getPressed()[0] === 1)) {&amp;#10;            if ((dragging === 0)) {&amp;#10;                dragging = 1;&amp;#10;                mouseY = mouse.getPos()[1];&amp;#10;            } else {&amp;#10;                scroll += ((mouse.getPos()[1] - mouseY) / 1.08);&amp;#10;                moving = 1;&amp;#10;            }&amp;#10;        } else {&amp;#10;            if ((dragging === 1)) {&amp;#10;                dragging = 0;&amp;#10;            }&amp;#10;        }&amp;#10;    }&amp;#10;}&amp;#10;if ((moving === 1)) {&amp;#10;    if ((scroll &gt;= maxScroll)) {&amp;#10;        scroll = maxScroll;&amp;#10;        if ((viewAll === 0)) {&amp;#10;            viewAll = 1;&amp;#10;            continueText.text = &quot;Press space to continue&quot;;&amp;#10;        }&amp;#10;    }&amp;#10;    scrollText.setPos([((- 0.45) * screenRatio), (0.45 + ((scroll * fontSize) * 1.08))]);&amp;#10;    scrollButton.setPos([(screenRatio * 0.475), ((trackLength / 2) - ((trackLength * scroll) / maxScroll))]);&amp;#10;    bottomCrop.setPos([((- 0.1) + (0.01 * (scroll % 2))), (- 0.475)]);&amp;#10;    continueText.setOpacity((1 - (0.01 * (scroll % 2))));&amp;#10;    moving = 0;&amp;#10;}&amp;#10;" valType="extendedCode"/>
+        <Param name="Each Frame" updates="constant" val="keys=event.getKeys()&amp;#10;if len(keys):&amp;#10;    if viewAll==1 and 'space' in keys:&amp;#10;        continueRoutine=False&amp;#10;    elif 'down' in keys:&amp;#10;        scroll+=1&amp;#10;        moving=1&amp;#10;    elif 'up' in keys:&amp;#10;        scroll-=1&amp;#10;        moving=1&amp;#10;elif mouse.isPressedIn(scrollBar):&amp;#10;    mouseY=mouse.getPos()[1]&amp;#10;    scroll = (trackLength/2-mouseY)*maxScroll/trackLength&amp;#10;    moving=1&amp;#10;elif mouse.getPressed()[0] == 1:&amp;#10;    if dragging==0:&amp;#10;        dragging=1&amp;#10;        mouseY=mouse.getPos()[1]&amp;#10;    else:&amp;#10;        scroll+=(mouse.getPos()[1]-mouseY)/fontSize/1.08&amp;#10;        mouseY=mouse.getPos()[1]&amp;#10;        moving=1&amp;#10;elif dragging==1:&amp;#10;    dragging=0&amp;#10;if moving==1:&amp;#10;    if scroll&gt;=maxScroll:&amp;#10;        scroll=maxScroll&amp;#10;        if viewAll == 0:&amp;#10;            viewAll=1&amp;#10;            continueText.text='Press space to continue'        &amp;#10;    scrollText.setPos((-.45*screenRatio, .45+scroll*fontSize*1.08))&amp;#10;    scrollButton.setPos((screenRatio*.475, trackLength/2-trackLength*scroll/maxScroll))&amp;#10;    bottomCrop.setPos((-.1+.01*(scroll%2), -.475))&amp;#10;    continueText.setOpacity(1-.01*(scroll%2))&amp;#10;    moving=0" valType="extendedCode"/>
+        <Param name="Each JS Frame" updates="constant" val="var _pj;&amp;#10;function _pj_snippets(container) {&amp;#10;    function in_es6(left, right) {&amp;#10;        if (((right instanceof Array) || ((typeof right) === &quot;string&quot;))) {&amp;#10;            return (right.indexOf(left) &gt; (- 1));&amp;#10;        } else {&amp;#10;            if (((right instanceof Map) || (right instanceof Set) || (right instanceof WeakMap) || (right instanceof WeakSet))) {&amp;#10;                return right.has(left);&amp;#10;            } else {&amp;#10;                return (left in right);&amp;#10;            }&amp;#10;        }&amp;#10;    }&amp;#10;    container[&quot;in_es6&quot;] = in_es6;&amp;#10;    return container;&amp;#10;}&amp;#10;_pj = {};&amp;#10;_pj_snippets(_pj);&amp;#10;keys = event.getKeys();&amp;#10;if (keys.length) {&amp;#10;    if (((viewAll === 1) &amp;&amp; _pj.in_es6(&quot;space&quot;, keys))) {&amp;#10;        continueRoutine = false;&amp;#10;    } else {&amp;#10;        if (_pj.in_es6(&quot;down&quot;, keys)) {&amp;#10;            scroll += 1;&amp;#10;            moving = 1;&amp;#10;        } else {&amp;#10;            if (_pj.in_es6(&quot;up&quot;, keys)) {&amp;#10;                scroll -= 1;&amp;#10;                moving = 1;&amp;#10;            }&amp;#10;        }&amp;#10;    }&amp;#10;} else {&amp;#10;    if (mouse.isPressedIn(scrollBar)) {&amp;#10;        mouseY = mouse.getPos()[1];&amp;#10;        scroll = ((((trackLength / 2) - mouseY) * maxScroll) / trackLength);&amp;#10;        moving = 1;&amp;#10;    } else {&amp;#10;        if ((mouse.getPressed()[0] === 1)) {&amp;#10;            if ((dragging === 0)) {&amp;#10;                dragging = 1;&amp;#10;                mouseY = mouse.getPos()[1];&amp;#10;            } else {&amp;#10;                scroll += (((mouse.getPos()[1] - mouseY) / fontSize) / 1.08);&amp;#10;                mouseY = mouse.getPos()[1];&amp;#10;                moving = 1;&amp;#10;            }&amp;#10;        } else {&amp;#10;            if ((dragging === 1)) {&amp;#10;                dragging = 0;&amp;#10;            }&amp;#10;        }&amp;#10;    }&amp;#10;}&amp;#10;if ((moving === 1)) {&amp;#10;    if ((scroll &gt;= maxScroll)) {&amp;#10;        scroll = maxScroll;&amp;#10;        if ((viewAll === 0)) {&amp;#10;            viewAll = 1;&amp;#10;            continueText.text = &quot;Press space to continue&quot;;&amp;#10;        }&amp;#10;    }&amp;#10;    scrollText.setPos([((- 0.45) * screenRatio), (0.45 + ((scroll * fontSize) * 1.08))]);&amp;#10;    scrollButton.setPos([(screenRatio * 0.475), ((trackLength / 2) - ((trackLength * scroll) / maxScroll))]);&amp;#10;    bottomCrop.setPos([((- 0.1) + (0.01 * (scroll % 2))), (- 0.475)]);&amp;#10;    continueText.setOpacity((1 - (0.01 * (scroll % 2))));&amp;#10;    moving = 0;&amp;#10;}&amp;#10;" valType="extendedCode"/>
         <Param name="End Experiment" updates="constant" val="" valType="extendedCode"/>
         <Param name="End JS Experiment" updates="constant" val="" valType="extendedCode"/>
         <Param name="End JS Routine" updates="constant" val="" valType="extendedCode"/>