"A researcher develops a 20-question test to measure anxiety and administers it to a group of participants. To evaluate the reliability of the test, the researcher computes a score for the first 10 questions and a score for the last 10 questions for each participant and then computes the correlation between the two scores. What is the researcher measuring?"

split-half reliability

Explanation:

Split-half testing measures reliability. In split-half reliability, a test for a single knowledge area is split into two parts and then both parts given to one group of students at the same time. The scores from both parts of the test are correlated. This is what the researcher did.

the researcher is measuring the deviation in the results

Explanation:

The deviation of a statistical result shows how far results depart from the center of the measurement. In other words, the results show how the measurements depart from the mean or average value. By taking the measurement values, the upper limit can be established. Next, the lower limit of the results can be measured. Next, the standard deviation can be measured to determine the nearness of furtherness of the values from the control values. Then, a plot of the standard deviation against the results can be plotted.

answer; all of the answers are correct;

answer; preconventional;