Qualities of good test instruments

The development of test of any kind always requires the careful consideration of the qualities of good measuring instruments. Characteristics of good measuring instrument. Qualities of Good Measuring Instruments I. The extent to which the instrument really measures what it is intended to measure.

The validity of the test concerns what the test measures and how well it does so.

I probably knew only half the at most, and it was like the test had material from some other book, not the one we were supposed to study!

And what was with that loud hammering during the test ?

RELIABILITYCHARACTERISTICS OF ACHARACTERISTICS OF AGOOD TESTGOOD TEST. If the two produce thesame , then the instrument is consideredreliable. VALIDITY Content, concurrent, predictive, construct 2. USABILITY (practicality) ease in administration, scoring, interpretation and application, low cost, proper mechanical . A good test should also be relatively reliable. As long as the quality being measured has not change this means that any person should get about the same score each time they take the test. However, to be reliable, the test must be relatively objective.

How can you obtain consistency among the scores . Hussein Ahmed Abdo Rajhy Lecturer, College of Education-Abs, Hajjah University Yemen Ph. The first aspect, equivalence, refers to the amount of agreement between two or more instruments that are administered at nearly the same point in time. For those characteristics , too, there are special devices used to measure them, called psychological tests. In fact, these are real measuring instruments , and are sometimes actually referred to as instruments.

Use only assessment procedures and instruments that have been demonstrated to be valid for the specific purpose for which they are being used. Although there are many types of reliability tests , what is more usually looked at is the internal consistency of the test. Equipment must be the same for all rowers. Both of these reference books are available in our Test Instruments Area!

The criteria for inclusion in the MMY are that the test be new or revised since the previous yearbook and that the publisher provide documentation supporting the technical qualities of the test. Validity is defined as, the extent to which the instrument measures . However, datasheets sometimes may be difficult to interpret due to their specialized terminology. For example, the characteristics of the material or device under test . Trustworthiness of the data can only be as good as the instruments or tests used to.

The field is concerned with the objective measurement of skills and knowledge, abilities, attitudes, personality traits , and educational achievement. Reliability and validity are the most important qualities in the.