diff --git a/app/controllers/text_samples_controller.rb b/app/controllers/text_samples_controller.rb
index caa5e6f..0244d53 100644
--- a/app/controllers/text_samples_controller.rb
+++ b/app/controllers/text_samples_controller.rb
@@ -78,7 +78,7 @@ def update # rubocop:disable Metrics/MethodLength
 
   # PATCH/PUT /text_samples/1/generate
   def reanalyse
-    @text_sample.analyse
+    @text_sample.reanalyse
     flash.now[:notice] = 'Text sample reanalysed successfully'
 
     # TODO: change the form_with in the show so that it submits via AJAX. This
diff --git a/app/models/sentence_chunk.rb b/app/models/sentence_chunk.rb
index 00742cd..8a39d07 100644
--- a/app/models/sentence_chunk.rb
+++ b/app/models/sentence_chunk.rb
@@ -85,6 +85,12 @@ def self.save_chunks_by_insert_all( # rubocop:disable Metrics/MethodLength
     SentenceChunk.insert_all! import_array
   end
 
+  def self.reanalyse(text_sample)
+    # clear out anything from previous analysis
+    SentenceChunk.where('text_sample_id = ?', text_sample.id).delete_all
+    SentenceChunk.analyse(text_sample)
+  end
+
   # Entry point for generating text using the sentence chunk strategy
   #
   # @param [Hash] params parameters to generate with
@@ -171,7 +177,7 @@ def self.choose_starting_chunk(text_sample_id, chunk_size)
     candidates[(rand * candidates.size).to_i]
   end
 
-  # Choose the next word chunk after this one
+  # Choose the next chunk after this one
   def choose_next_chunk
     token_ids_where = []
 
diff --git a/app/models/text_sample.rb b/app/models/text_sample.rb
index 24c5c44..e012cb6 100644
--- a/app/models/text_sample.rb
+++ b/app/models/text_sample.rb
@@ -19,6 +19,17 @@ def analyse
     end
   end
 
+  def reanalyse
+    STRATEGIES.each do |strategy|
+      case strategy
+      when :word_chunk
+        WordChunk.reanalyse self
+      when :sentence_chunk
+        SentenceChunk.reanalyse self
+      end
+    end
+  end
+
   # generate text for the current text sample using the given strategy
   def generate(params = { strategy: :word_chunk })
     # add the current text sample to params
diff --git a/app/models/word_chunk.rb b/app/models/word_chunk.rb
index 4930e70..c0618b3 100644
--- a/app/models/word_chunk.rb
+++ b/app/models/word_chunk.rb
@@ -86,6 +86,12 @@ def self.save_word_chunks_by_create(chunks_hash, text_sample, chunk_size)
     end
   end
 
+  def self.reanalyse(text_sample)
+    # clear out anything from previous analysis
+    WordChunk.where('text_sample_id = ?', text_sample.id).delete_all
+    WordChunk.analyse(text_sample)
+  end
+
   # Entry point for generating text using the word chunk strategy
   def self.generate(params = {}) # rubocop:disable Metrics/MethodLength
     unless chunks_built_for? params[:text_sample_id]
diff --git a/spec/models/sentence_chunk_spec.rb b/spec/models/sentence_chunk_spec.rb
index dd2717f..df9b72d 100644
--- a/spec/models/sentence_chunk_spec.rb
+++ b/spec/models/sentence_chunk_spec.rb
@@ -63,6 +63,37 @@
     end
   end
 
+  describe '::reanalyse' do
+    let(:text_sample) { TextSample.create!(description: 'Stuff', text: 'man on the moon') }
+    let(:relation) { double('relation') }
+
+    before(:each) do
+      text_sample.analyse
+
+      expect(WordChunk.count).to be > 0
+      expect(SentenceChunk.count).to be > 0
+
+      allow(SentenceChunk).to receive(:where).and_return(relation)
+      allow(relation).to receive(:delete_all)
+      allow(SentenceChunk).to receive(:analyse)
+    end
+
+    it 'deletes all Sentence Chunks' do
+      SentenceChunk.reanalyse(text_sample)
+
+      expect(SentenceChunk)
+        .to have_received(:where)
+        .with('text_sample_id = ?', text_sample.id)
+      expect(relation).to have_received(:delete_all)
+    end
+
+    it 'calls analyse' do
+      SentenceChunk.reanalyse(text_sample)
+
+      expect(SentenceChunk).to have_received(:analyse).with(text_sample)
+    end
+  end
+
   describe '::count_chunks' do
     let(:text_sample) { TextSample.create!(description: 'Stuff', text: 'at ') }
     let(:token_ids) { 'array of token ids' } # for example [1,2]
@@ -555,7 +586,7 @@
                 sentence_chunk_size: 2 }))
     end
 
-    it 'chooses word chunk from candidates' do
+    it 'chooses sentence chunk from candidates' do
       expect(SentenceChunk)
         .to(
           have_received(:choose_chunk_from_candidates).with(candidates)
@@ -572,14 +603,14 @@
         .to receive(:build_counts_array).and_return(counts_array)
     end
 
-    it 'calculates probabilities of each word chunk' do
+    it 'calculates probabilities of each sentence chunk' do
       SentenceChunk.choose_chunk_from_candidates(candidates)
 
       expect(SentenceChunk)
         .to(have_received(:build_counts_array).with(candidates))
     end
 
-    it 'selects a word chunk' do
+    it 'selects a sentence chunk' do
       new_chunk = SentenceChunk.choose_chunk_from_candidates(candidates)
 
       expect(new_chunk).to be_instance_of(SentenceChunk)
diff --git a/spec/models/text_sample_spec.rb b/spec/models/text_sample_spec.rb
index bf85c15..9e26637 100644
--- a/spec/models/text_sample_spec.rb
+++ b/spec/models/text_sample_spec.rb
@@ -23,6 +23,26 @@
     end
   end
 
+  describe '#reanalyse' do
+    let(:text_sample) { create(:text_sample) }
+
+    it 'reanalyses SentenceChunk' do
+      allow(SentenceChunk).to receive(:reanalyse)
+
+      text_sample.reanalyse
+
+      expect(SentenceChunk).to have_received(:reanalyse).with(text_sample)
+    end
+
+    it 'reanalyses Word Chunks' do
+      allow(WordChunk).to receive(:reanalyse)
+
+      text_sample.reanalyse
+
+      expect(WordChunk).to have_received(:reanalyse).with(text_sample)
+    end
+  end
+
   describe '#generate' do # rubocop:disable Metrics/BlockLength
     let(:text_sample) do
       TextSample.create!(description: 'Stuff', text: 'another man')
diff --git a/spec/models/word_chunk_spec.rb b/spec/models/word_chunk_spec.rb
index 6d9b803..a35c8c5 100644
--- a/spec/models/word_chunk_spec.rb
+++ b/spec/models/word_chunk_spec.rb
@@ -38,6 +38,37 @@
     end
   end
 
+  describe '::reanalyse' do
+    let(:text_sample) { TextSample.create!(description: 'Stuff', text: 'man on') }
+    let(:relation) { double('relation') }
+
+    before(:each) do
+      text_sample.analyse
+
+      expect(WordChunk.count).to be > 0
+      expect(SentenceChunk.count).to be > 0
+
+      allow(WordChunk).to receive(:where).and_return(relation)
+      allow(relation).to receive(:delete_all)
+      allow(WordChunk).to receive(:analyse)
+    end
+
+    it 'deletes all Word Chunks' do
+      WordChunk.reanalyse(text_sample)
+
+      expect(WordChunk)
+        .to have_received(:where)
+        .with('text_sample_id = ?', text_sample.id)
+      expect(relation).to have_received(:delete_all)
+    end
+
+    it 'calls analyse' do
+      WordChunk.reanalyse(text_sample)
+
+      expect(WordChunk).to have_received(:analyse).with(text_sample)
+    end
+  end
+
   describe '::count_chunks_of_size' do
     let(:text_sample) { TextSample.create!(description: 'Stuff', text: 'at') }
     let(:chunks_hash) { { 'at' => 1 } }
diff --git a/spec/requests/text_samples_spec.rb b/spec/requests/text_samples_spec.rb
index f848680..2d95c8d 100644
--- a/spec/requests/text_samples_spec.rb
+++ b/spec/requests/text_samples_spec.rb
@@ -197,7 +197,7 @@
         allow(text_sample)
           .to receive(:generate).and_return(generation_result)
         get generate_text_sample_url(text_sample), params: {
-          chunk_size: chunk_size, output_size: output_size
+          chunk_size: chunk_size, output_size: output_size, strategy: :word_chunk
         }
       end
 
@@ -206,7 +206,7 @@
       end
 
       it 'sets a flash message' do
-        expect(flash[:notice]).to eq(generation_result[:message])
+        expect(flash[:warning]).to eq(generation_result[:message])
       end
     end