Running Comparisons

Learning Statement: In this article you’ll learn how to use Simple and Advanced comparisons to analyse group opinions.
Audience: This article is aimed at all OMBEA Response users.

Option 1: SIMPLE COMPARISON SLIDES

Background

OMBEA Response’s Simple Comparison Slide shows the last two instances of a particular question being polled and then repolled.

Part 1: Add a Simple Comparison slide

  1. Ensure you have a question slide in your presentation which you would like to feed into the Simple Comparison Slide.
  2. On the OMBEA Response ribbon click on the bottom half of the New button.
  3. From the menu that appears, click Analysis > Simple Comparison.
  4. The Simple Comparison dialogue appears. Select your question from the drop down box and OMBEA will insert a new Comparison slide.

Part 2: Use the Comparison slide

  1. Run your session as normal. Poll the first instance of your comparison question as normal.
  2. When you are ready to poll the same question again, return to the question slide and hit F8 or the Repoll button in the top right corner of your screen.
  3. Close polling as normal once your audience has finished voting.
  4. Proceed through your slides as normal. When you reach the Comparison slide, you will see the Before and After data displayed side by side.

Option 2: ADVANCED COMPARISON SLIDES

Background

OMBEA Response’s Advanced Comparison Tool allows you to measure or score a list of items against a scale, and then summarise all the results at the end on a single slide which illustrates how the items compare against each other on your scale.

To illustrate this concept we will use the example of comparing different fruits against each other for ‘Sweetness’ and ’Texture’. In our example, ’Sweetness’ and ’Texture’ are the only criteria we are rating our fruits against, so we have a 2-Criteria Comparison.

Part 1: Build your slides with the Advanced Comparison tool.

  1. On the OMBEA Response ribbon click on the bottom half of the New button.
  2. From the menu that appears, click Analysis > Advanced Comparison.
  3. The Advanced Comparison dialogue appears.
  4. Under the selection titled Step 1 select 2-Criteria.
  5. Below the preview image enter a name for the criterion in the box titled First Criterion (Horizontal Axis) and then again in the box titled Second Criterion (Vertical Axis). In this example the names would be ‘Sweetness’ and ‘Texture’.
  6. Select Automatically create new ranking slides.

    1. With this option, OMBEA Response will build all the slides for you. If you have already made some polling slides which you wish to compare, select Use existing slides instead.
  7. Under Step 2, enter the list of items you want to compare, clicking Add after each one. In our case, we would add ‘Apples’, ‘Bananas’, ‘Cherries’ and so on.
  8. Now select the type of comparison you wish to perform.

    1. The Ranking Scale option will present each fruit individually and ask voters to give it a score.
    2. Alternatively the Paired Comparison option will present all possible pairs of fruit, asking voters to select the sweetest. Selecting Include ‘No Preference’ will add this option to each polling slide in a paired comparison scenario.
  9. The next step depends on the type of comparison you chose.

    1. If you chose Paired Comparison you’re now done and you can click Insert to finish the process and move on to ‘Part 2’ below.
    2. If you chose Ranking Scale move on to step 10.
  10. Select your Slide Order.

    1. Grouped by Criteria is only relevant to a 2- or 3-criteria comparison. Here OMBEA Response will ask about the ‘Sweetness’ of each fruit first, before moving on to ask about the ’Texture’ of each fruit.
    2. Group by Item will ask all questions about the ‘Apple’, before moving on to ask all questions about the ‘Banana’, and so on.
  11. Set your Ranking Scale by choosing the Highest Rank (the highest score people can give an item). You can name the scores in the Ranking Scale box beneath the Highest Rank by double-clicking on each one.

  12. Click Insert to finish. OMBEA will build your slides.

Paired Comparisons are more powerful when you are dealing with a situation where all items could come out with the same score, since paired comparisons force people to prioritise items.

Part 2: Use your Advanced Comparison slides

  1. Run your session as normal. When you ask each question the chart will not be shown.
  2. Once you have reached the final slide you will see all the items compared against each other on the same chart.

If you would prefer to display the individual charts on each slide, you can change the settings within OMBEA Response’s Properties window. Just change the Chart Type from No Chart to your preferred type.

If you get OMBEA to use your existing slides rather than building new ones for you, you can have different scoring scales from one slide to the next. For example one item might be rated from 1-5, whilst another is rated from 1-3. If this is the case, choose Normalize Values and OMBEA Response will convert all scores as if they were on a 10-point scale so that they can be directly compared.