Scrimmage 3

Validity is determined by finding the correlation between scores on:

A test and some independent criterion (gold standard)

What are the two types of independent variables? Be sure to provide examples of each

Active- a drug Attribute- sex

A double- blind experiment is which one? a. both the experimenter and control groups are exposed to identical pretesting and posttesting conditions b. neither the researcher nor the participants know which participants receive the experimental treatment C. neither the experimental nor control groups know which participants receive the experimental, but the experimenter knows D. both the experimental and control groups receive the same tests

B.

What is a construct and what is the process/how are they measured?

Creation based on observation but cannot be completely observed directly or indirectly. Measure constructs through operationalization

What is the difference between limitations and delimitation?

Delimitation- define scope of study, chosen by the researcher. Ex. age sex Limitations-not under control of investigator and may influence results of study. Prior exposure to test, education

When doing research with middle school students, a researcher must attain which of the following? A. consent of the parent B. consent of the child C. assent of the parent D. Assent of the child E. A and D F. B and C

E

After a population of 1,000 college seniors divided by sex and size of school attended, the random selection of a sample to represent these proportions of the population is called..

stratified random sampling

Reliability of a measure may be established by?

giving the test to the same people on two different occasions and correlating the two sets of scores

If a thermometer measured the temperature in an oven as 400 F five days in a row when the temperature was actually 377 F, this measuring instrument would be considered

Reliable but not valid

What is the difference between probability and nonprobability sampling? what are some specific methods used to conduct both types of sampling

probability sampling- use random selection; each pop member has equal chance of being chosen. Simple random sampling Nonprobability sampling- sampling made with nonrandom methods. Convenience Sampling