Rarely, proton pump inhibitors (such as omeprazole) have caused vitamin B-12 deficiency. The risk is increased if they are taken every day for a long time (3 years or longer). Tell your doctor right away if you develop symptoms of vitamin B-12 deficiency (such as unusual weakness, sore tongue, or numbness/tingling of the hands/feet).
Stability reliability refers to the consistency of students' scores when a test is administered to the same students on two different occasions. Alternate-form reliability describes the consistency of students' performances on two different (hopefully equivalent) versions of the same test.
Concurrent Validity refers to the extent to which test scores correlate with scores on other relevant measures administered at the same time.Concurrent Validity is the type of Validity d.ther definition: Concurrent validity refers to an assessment of whether a test is measuring what it claims to be measuring by correlating scores with some currently available relevant criterion (e.g., school performance).