Paralleltestreliabilität

Paralleltestreliabilität is a method for assessing the reliability of a measurement instrument, such as a psychological test or questionnaire. It is also known as the alternate-forms reliability or parallel-forms reliability. This method involves creating two distinct versions of the same test that are designed to measure the same underlying construct. These two versions, referred to as parallel forms, are constructed such that they have the same content, difficulty level, and statistical properties, including the same mean and variance.

The procedure for assessing paralleltestreliabilität typically involves administering both parallel forms of the test to the same group of individuals, often within a short period of time to minimize the influence of external factors. The scores obtained from the two forms are then correlated. A high correlation coefficient between the scores from the two parallel forms indicates that the measurement instrument is reliable, meaning it consistently produces similar results when measuring the same construct under similar conditions. The correlation coefficient serves as the measure of reliability for the instrument. This method helps to ensure that the observed scores are not due to random error or specific wording unique to a single test version.