diff --git a/app/models/impressionist/impressionable.rb b/app/models/impressionist/impressionable.rb
index f4029f4..6efc533 100644
--- a/app/models/impressionist/impressionable.rb
+++ b/app/models/impressionist/impressionable.rb
@@ -15,6 +15,10 @@ module Impressionist
       end
 
       def unique_impression_count(start_date=nil,end_date=Time.now)
+        start_date.blank? ? impressions.group(:request_hash).all.size : impressions.where("created_at>=? and created_at<=?",start_date,end_date).group(:request_hash).all.size
+      end
+      
+      def unique_impression_count_ip(start_date=nil,end_date=nil)
         start_date.blank? ? impressions.group(:ip_address).all.size : impressions.where("created_at>=? and created_at<=?",start_date,end_date).group(:ip_address).all.size
       end
     end
diff --git a/test_app/Gemfile.lock b/test_app/Gemfile.lock
index 31b0da6..8d0d14c 100644
--- a/test_app/Gemfile.lock
+++ b/test_app/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: /rails_plugins/mine/impressionist
   specs:
-    impressionist (0.2.3)
+    impressionist (0.2.4)
 
 GEM
   remote: http://rubygems.org/
diff --git a/test_app/spec/fixtures/impressions.yml b/test_app/spec/fixtures/impressions.yml
index 191e8b0..b397089 100644
--- a/test_app/spec/fixtures/impressions.yml
+++ b/test_app/spec/fixtures/impressions.yml
@@ -2,6 +2,7 @@
 impression<%= i %>:
   impressionable_type: Article
   impressionable_id: 1
+  request_hash: a<%=i%>
   ip_address: 127.0.0.<%=i%>
   created_at: 2011-01-01
 <% end %>
@@ -10,17 +11,28 @@ impression<%= i %>:
 impression8:
   impressionable_type: Article
   impressionable_id: 1
+  request_hash: a1
   ip_address: 127.0.0.1
   created_at: 2010-01-01
   
 impression9:
   impressionable_type: Article
   impressionable_id: 1
+  request_hash: a1
   ip_address: 127.0.0.1
   created_at: 2011-01-03
     
 impression10:
   impressionable_type: Article
   impressionable_id: 1
+  request_hash: a9
+  ip_address: 127.0.0.8
+  created_at: 2010-01-01  
+  
+impression11:
+  impressionable_type: Article
+  impressionable_id: 1
+  request_hash: a10
   ip_address: 127.0.0.1
-  created_at: 2010-01-01  
\ No newline at end of file
+  created_at: 2010-01-01  
+  
\ No newline at end of file
diff --git a/test_app/spec/models/model_spec.rb b/test_app/spec/models/model_spec.rb
index e17fc46..439ebaf 100644
--- a/test_app/spec/models/model_spec.rb
+++ b/test_app/spec/models/model_spec.rb
@@ -9,7 +9,7 @@ describe Impression do
   
   it "should save a blank impression for an Article that has 10 impressions" do
     @article.impressions.create
-    @article.impressions.size.should eq 11
+    @article.impressions.size.should eq 12
   end
   
   it "should save an impression with a message" do
@@ -17,27 +17,31 @@ describe Impression do
     @article.impressions.last.message.should eq "test message"
   end
   
-  it "should return the view count with no date range specified" do
-    @article.impression_count.should eq 10
+  it "should return the impression count with no date range specified" do
+    @article.impression_count.should eq 11
   end
   
-  it "should return unique view count with no date range specified" do
-    @article.unique_impression_count.should eq 7
+  it "should return unique impression count with no date range specified" do
+    @article.unique_impression_count.should eq 9
   end
   
-  it "should return view count with only start date specified" do
+  it "should return impression count with only start date specified" do
     @article.impression_count("2011-01-01").should eq 8
   end
   
-  it "should return view count with whole date range specified" do
+  it "should return impression count with whole date range specified" do
     @article.impression_count("2011-01-01","2011-01-02").should eq 7
   end
 
-  it "should return unique view count with only start date specified" do
+  it "should return unique impression count with only start date specified" do
     @article.unique_impression_count("2011-01-01").should eq 7
   end
   
-  it "should return unique view count with date range specified" do
+  it "should return unique impression count with date range specified" do
     @article.unique_impression_count("2011-01-01","2011-01-02").should eq 7
   end
+  
+  it "should return unique impression count using ip address (which in turn eliminates duplicate request_hashes)" do
+    @article.unique_impression_count_ip.should eq 8
+  end
 end
\ No newline at end of file