At the _____ level of measurement, the numbers assigned to cases specify only the order of the cases, permitting greater than and less than distinctions.

Which of the following is used in conjunction with diffuse illumination?

Every Friday, Dr. P and the Dr. Q observe and record instances of bullying in an elementary school cafeteria.  Because two people are observing and recording instances of bullying, _____ is likely their goal. 

Which of the following is an example of a variable measured at the interval/ratio level of measurement?

A researcher has decided to do a study of people who hunt in a nearby national forest. He asks a friend, whom he knows to be a hunter, if he would consent to an interview. He interviews his friend, and then asks his friend if he could name other people who hunted in the forest. His friend provides him with five names. The researcher contacts those five people, interviews them, and asks each of those people for names of other hunters. This sampling technique is known as ______.

Changes in tongue placement for vowels do not alter the vowel quality.  

The problem of _____ is the biggest limitation of true experimental designs. 

______ sampling methods rely on random selection procedures, such as flipping a coin.

To study change in the same set of individuals over time, which of the following kinds of study would work best:

Measurement _____ can be improved by using multiple questions about a concept, like delinquency, rather than just one question about delinquency.