Answer:
The correct answer is - a nominal type of measure as it has an owner (known) and unknown type of qualitative independent variable.
Step-by-step explanation:
In this study, the independent variables are known variable or stimuli that is the owner and the unknown stimuli like an unfamiliar human, a cat, and an unfamiliar dominant dog. The dependent variable is the movement in the tail by the dog.
The independent variables are qualitative and categorical in this study that categories these variables in known and unknown category which is termed as nominal type of measure.