diff --git a/README.md b/README.md
index 3019965d..edb77308 100644
--- a/README.md
+++ b/README.md
@@ -420,10 +420,10 @@ opentok.forceDisconnect(sessionId, connectionId, function (error) {
 This is the server-side equivalent to the forceDisconnect() method in OpenTok.js:
 <https://www.tokbox.com/developer/guides/moderation/js/#force_disconnect>.
 
-### Force Mute a participant
+### Forcing a publisher to mute audio
 
-You can force mute participants from an OpenTok Session using the
-`openTok.forceMute(sessionId, streamId, callback)` method.
+You can force the publisher of a specified stream to mute its audio using the
+`OpenTok.forceMute(sessionId, streamId, callback)` method.
 
 ```javascript
 opentok.forceMute(sessionId, streamId, function (error) {
@@ -431,22 +431,26 @@ opentok.forceMute(sessionId, streamId, function (error) {
 });
 ```
 
-### Force Mute All participants
+### Forcing all participants in a session to mute audio
 
-You can force mute all participants from an OpenTok Session using the
+You can force all publishers in the session (except for those publishing
+excluded streams) to mute audio using the
 `openTok.forceMuteAll(sessionId, excludedStreamIds, callback)` method.
-To mute all participants call forceMuteAll with out excludedStreamIds.
-To exclude streams from being muted use the excludedStreamIds.
+
+To mute audio in all streams in the session, call the method without adding an
+`excludedStreamIds` parameter:
 
 ```javascript
-const excludedStreamIds = ['stream1','stream2'];
-opentok.forceMuteAll(sessionId, excludedStreamIds, function (error) {
+opentok.forceMuteAll(sessionId, null, function (error) {
   if (error) return console.log("error:", error);
 });
 ```
 
+To exclude streams from being muted, use the `excludedStreamIds` parameter:
+
 ```javascript
-opentok.forceMuteAll(sessionId, null, function (error) {
+const excludedStreamIds = ['stream1','stream2'];
+opentok.forceMuteAll(sessionId, excludedStreamIds, function (error) {
   if (error) return console.log("error:", error);
 });
 ```
diff --git a/lib/muteModeration.js b/lib/muteModeration.js
index d30346c6..b5ac16a3 100644
--- a/lib/muteModeration.js
+++ b/lib/muteModeration.js
@@ -27,10 +27,10 @@ var api = function (config, method, session, stream, body, callback) {
 
 handleForceMute = function (config, sessionId, streamId, excludedStreamIds = null, callback) {
   if (typeof callback !== 'function') {
-    throw (new errors.ArgumentError('No callback given to signal'));
+    throw (new errors.ArgumentError('No callback given'));
   }
   if (sessionId == null) {
-    return callback(new errors.ArgumentError('No sessionId or connectionId given to signal'));
+    return callback(new errors.ArgumentError('No sessionId or streamId given'));
   }
   let body=null;
   if(excludedStreamIds){
diff --git a/lib/opentok.js b/lib/opentok.js
index fbb7a71c..7ae34a85 100644
--- a/lib/opentok.js
+++ b/lib/opentok.js
@@ -800,7 +800,7 @@ OpenTok = function (apiKey, apiSecret, env) {
   this.forceDisconnect = moderation.forceDisconnect.bind(null, apiConfig);
 
   /**
-  * Mutes a participant from an OpenTok session.
+  * Forces the publisher of a specified stream to mute its audio.
   *
   * @param sessionId The session ID for the OpenTok session that the client you want
   * to mute is connected to.
@@ -824,12 +824,12 @@ OpenTok = function (apiKey, apiSecret, env) {
  this.forceMute = muteModeration.forceMute.bind(null, apiConfig);
 
   /**
-  * Mutes a participant from an OpenTok session.
+  * Forces all publishers in the session (except for those publishing excluded streams)
+  * to mute audio.
   *
-  * @param sessionId The session ID for the OpenTok session that the client you want
-  * to mute is connected to.
+  * @param sessionId The session ID for the OpenTok session in which you want to mute clients.
   *
-  * @param excludedSteamIds (optional) A list of stream Ids to exclude from mute.
+  * @param excludedSteamIds (optional) A list of stream IDs to exclude from being muted.
   *
   * @param callback {Function} The function to call upon completing the operation. Two arguments
   * are passed to the function: