What are the two types of validity?
Concurrent validity and predictive validity are the two types of criterion-related validity. Concurrent validity involves measurements that are administered at the same time, while predictive validity involves one measurement predicting future performance on another.
What makes a test valid?
Validity refers to what characteristic the test measures and how well the test measures that characteristic. Validity tells you if the characteristic being measured by a test is related to job qualifications and requirements. Validity gives meaning to the test scores.
Can something be valid but not reliable?
A measure can be reliable but not valid, if it is measuring something very consistently but is consistently measuring the wrong construct. Likewise, a measure can be valid but not reliable if it is measuring the right construct, but not doing so in a consistent manner.
Is reliable test always valid Why?
A test can be reliable, meaning that the test-takers will get the same score no matter when or where they take it, within reason of course. But that doesn’t mean that it is valid or measuring what it is supposed to measure. However, a test cannot be valid unless it is reliable.