For each of these descriptions, identify the type of evidence for reliability.
a. Mr. Fox is the principal of Herring Middle School. He is working on a measure of teacher job satisfaction and has developed a number of items for different traits. He hopes that about six items per trait will be sufficient.
b. A college counselor is interested in knowing whether small-group counseling with students having difficulties have made a difference. She has developed a measure of self-confidence and anxiety for her study and has given this measure to a control group of students four times during the semester.
c. Kevin Sutherland is a professor of special education. He does single-subject research and needs to use several different graduate students to collect data. He gathers pilot data to see if the students agree on what they observe.
