Hall - Choice Blindness

How many participants were there?

• 150

• 160

• 180

• 190

The blackcurrent jam was paired with

• Blueberry

• Blackberry

• Bilberry

• Rasperry

Which pair of jams were considered similar?

• Ginger and Lime

• Cinnamon-Apple and Grapefruit

• Blackcurrant and Blueberry

For the chosen teas, which pair were considered the most similar?

• Pernod (Anise/Liquorice) vs. Mango

• Caramel & Cream vs. Cinnamon

• Apple-Pie and Honey

How were the participants recruited?

• by asking them whether they had tried 2 new products being launched at the store?

• by asking them whether they were willing to take part in a ‘quality control’ test of the jam and tea assortment at the store?

• by asking them if they could tell the difference between different brands of tea and jam?

The sampling strategy used was...?

• Opportunity

• Random

• Restricted

• Snowballing

How many participants were told they would receive a gift of their preferred jam or tea?

• 25%

• 30%

• 50%

• 67%

For each jam or tea trial, how many trials were conducted?

• 20 M and 20NM

• 30 M and 30 NM

• 40 M and 40 NM

• 50 M and 50 NM

What happened after completing the jam or tea pairing?

• Participants were asked if they would like to repeat the same with either the jam or the tea?

• Participants were asked if they would like to try anything else to taste?

• Participants were asked if they would like to buy any one of the two products?

• Participants were asked if they had felt that anything was odd or unusual with the setup?

Which of the following were the participants NOT asked to do?

• Asked to taste each alternative twice?

• Asked to explain their choice of preference?

• Asked how difficult they felt it was to discriminate between the two alternatives on a 10-point scale how difficult

• Asked, on a 10-point scale how confident they were in their choice?