diff --git a/app/models/poll/partial_result.rb b/app/models/poll/partial_result.rb
index 037395277..e42589a03 100644
--- a/app/models/poll/partial_result.rb
+++ b/app/models/poll/partial_result.rb
@@ -15,4 +15,14 @@ class Poll::PartialResult < ActiveRecord::Base
 
   scope :by_author, -> (author_id) { where(author_id: author_id) }
   scope :by_question, -> (question_id) { where(question_id: question_id) }
+
+  before_save :update_logs
+
+  def update_logs
+    if self.amount_changed? && self.amount_was.present?
+      self.amount_log += ":#{self.amount_was.to_s}"
+      self.officer_assignment_id_log += ":#{self.officer_assignment_id_was.to_s}"
+      self.author_id_log += ":#{self.author_id_was.to_s}"
+    end
+  end
 end
\ No newline at end of file
diff --git a/db/migrate/20170202151151_add_log_fields_to_poll_partial_results.rb b/db/migrate/20170202151151_add_log_fields_to_poll_partial_results.rb
new file mode 100644
index 000000000..86966aed4
--- /dev/null
+++ b/db/migrate/20170202151151_add_log_fields_to_poll_partial_results.rb
@@ -0,0 +1,7 @@
+class AddLogFieldsToPollPartialResults < ActiveRecord::Migration
+  def change
+    add_column :poll_partial_results, :amount_log, :text, default: ""
+    add_column :poll_partial_results, :officer_assignment_id_log, :text, default: ""
+    add_column :poll_partial_results, :author_id_log, :text, default: ""
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 13ad1dce7..95028b472 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20170201113206) do
+ActiveRecord::Schema.define(version: 20170202151151) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -433,6 +433,9 @@ ActiveRecord::Schema.define(version: 20170201113206) do
     t.date    "date"
     t.integer "booth_assignment_id"
     t.integer "officer_assignment_id"
+    t.text    "amount_log",                default: ""
+    t.text    "officer_assignment_id_log", default: ""
+    t.text    "author_id_log",             default: ""
   end
 
   add_index "poll_partial_results", ["answer"], name: "index_poll_partial_results_on_answer", using: :btree
diff --git a/spec/features/officing/results_spec.rb b/spec/features/officing/results_spec.rb
index 141bcd687..586ed387e 100644
--- a/spec/features/officing/results_spec.rb
+++ b/spec/features/officing/results_spec.rb
@@ -84,7 +84,7 @@ feature 'Officing Results' do
 
     visit officing_poll_results_path(@poll, date: I18n.l(partial_result.date), booth_assignment_id: partial_result.booth_assignment_id)
 
-    expect(page).to have_content('7777')
+    within("#question_#{@question_1.id}_0_result") { expect(page).to have_content('7777') }
 
     visit new_officing_poll_result_path(@poll)
 
diff --git a/spec/models/poll/partial_result_spec.rb b/spec/models/poll/partial_result_spec.rb
index 1d203862b..70651eda6 100644
--- a/spec/models/poll/partial_result_spec.rb
+++ b/spec/models/poll/partial_result_spec.rb
@@ -13,4 +13,69 @@ describe Poll::PartialResult do
     end
   end
 
+  describe "logging changes" do
+    it "should update amount_log if amount changes" do
+      partial_result = create(:poll_partial_result, amount: 33)
+
+      expect(partial_result.amount_log).to eq("")
+
+      partial_result.amount = 33
+      partial_result.save
+      partial_result.amount = 32
+      partial_result.save
+      partial_result.amount = 34
+      partial_result.save
+
+      expect(partial_result.amount_log).to eq(":33:32")
+    end
+
+    it "should update officer_assignment_id_log if amount changes" do
+      partial_result = create(:poll_partial_result, amount: 33)
+
+      expect(partial_result.amount_log).to eq("")
+      expect(partial_result.officer_assignment_id_log).to eq("")
+
+      partial_result.amount = 33
+      partial_result.officer_assignment_id = 1
+      partial_result.save
+
+      partial_result.amount = 32
+      partial_result.officer_assignment_id = 2
+      partial_result.save
+
+      partial_result.amount = 34
+      partial_result.officer_assignment_id = 3
+      partial_result.save
+
+      expect(partial_result.amount_log).to eq(":33:32")
+      expect(partial_result.officer_assignment_id_log).to eq(":1:2")
+    end
+
+    it "should update author_id if amount changes" do
+      partial_result = create(:poll_partial_result, amount: 33)
+
+      expect(partial_result.amount_log).to eq("")
+      expect(partial_result.author_id_log).to eq("")
+
+      author_A = create(:poll_officer).user
+      author_B = create(:poll_officer).user
+      author_C = create(:poll_officer).user
+
+      partial_result.amount = 33
+      partial_result.author_id = author_A.id
+      partial_result.save!
+
+      partial_result.amount = 32
+      partial_result.author_id = author_B.id
+      partial_result.save!
+
+      partial_result.amount = 34
+      partial_result.author_id = author_C.id
+      partial_result.save!
+
+      expect(partial_result.amount_log).to eq(":33:32")
+      expect(partial_result.author_id_log).to eq(":#{author_A.id}:#{author_B.id}")
+    end
+  end
+
 end