A scientist in a soft drink company conducts an experiment to see whether participants can differentiate between their brand new (soon to be released) flavour and previous versions that have been on the market for a while. Their top-secret flavour "BLAST: Diet eXtreme" has lower caloric content and less caffeine, however they're worried that customers will be able to tell the difference between their new drink and older Diet versions as well as BLAST: Original. If the public elects not to buy the new drink on taste alone, all the money they've invested in developing Diet eXtreme will go to waste.

The scientist samples N=1,000 participants who are on their research volunteer database, which consists of general public who opt-in to consumer research in return for incentives such as shopping vouchers. The company scientist screens them on their soft drink habits prior to the experiment, grouping them into those who self-report high, moderate, and low/no frequency of soft drink consumption. They then all blind-taste three different soft drinks; BLAST: Diet eXtreme; their older BLAST: Diet; as well as BLAST: Original. After each drink the participant is asked how tasty that flavour is.

Which of the options below best describes the nature of the variables in this scientist's ANOVA design?

Question 2Select one:

a.

Frequency-of-consumption is a between-groups independent variable; Drink-type is a within-groups independent variable; Tastiness is the dependent variable.

b.

Drink-typeis a between-groups independent variable;Time is a within-groups independent variable; Frequency-of-consumption is the dependent variable.

c.

Frequency-of-consumption is a within-groups independent variable;Drink-type is a between-groups independent variable; Tastiness is the dependent variable.

d.

Drink-typeis a between-groups independent variable;Frequency-of-consumption is a between-groups independent variable; Tastiness is the dependent variable.