How does effect size relate to instrument sensitivity? a. If ...

[Capo]

How does effect size relate to instrument sensitivity?
 
  a. If an instrument is sensitive, it will have a large effect size.
  b. If an instrument is not very sensitive, it will take a large effect size for the instrument to detect a difference.
  c. As an instrument is better calibrated and becomes more sensitive, it increases effect size.
  d. If an instrument is extremely sensitive, it will detect a difference even when none exists; because of this effect sizes must be large.

Question 2

Which of the following types of sampling is least common in qualitative research?
 
  a. Convenience
  b. Purposive
  c. Snowball
  d. Random

[Jmfn03]

Answer to Question 1

ANS: B
Well-developed instruments measure phenomena with precision. The more sensitive the measurement methods used in a study, the better they will detect even a small effect size. A sensitive instrument does not produce an effectit measures it. Effect size is not altered by calibration of instruments; again, sensitivity does not increase effect size. A legitimate instrument detects a difference when one exists, and only when one exists.

Answer to Question 2

ANS: D
Nonrandom sampling prevails in qualitative research. Of the five methods in the text, purposive sampling, network sampling, and theoretical sampling are more commonly applied in qualitative studies than in quantitative studies. Convenience and quota sampling may also be used, but they are less common.