Test administration reliability is related to the condition in which that test is administered. (how to solve this problem? PAGE 28)Ħ 1- Reliability Applying the reliability principle – read page 41Ĭ. Intra-rater reliability is common in the classroom teachers because of unclear criteria or biases toward particular bad or good students. Due to lack of attention, inexperience, or even biases. inter-rater reliability is when two or more scorers yield inconsistent scores of the same test. Rater reliability is related to human subjectivity, biased and error. Also includes test-wiseness or strategies for efficient test-taking b. Is related to factors that might contribute to the students themselves such as illness, fatigue, anxiety or any other physical and psychological factors which might make the observed score unreflective to the actual students performance. There are four factors that might contribute to the unreliability of a test : Students related reliability Rater reliability (scoring) Test administration reliability Test reliabilityĥ 1- Reliability a.

It is not a valid measure of your weight.Ĥ 1- Reliability “a reliable test is consistent and dependable: this means that if you give the test to the same students but in two different occasions, the test should yield=give the same results. The scale is reliable because it consistently reports the same weight every day, but it is not valid because it adds 3 kg to your true weight. For example, if your scale is off by 3 kg, it reads your weight every day with an excess of 3 kg. For a test to be reliable, it also needs to be valid. Validity refers to how well a test measures what it is purported to measure Why is it necessary? While reliability is necessary, it alone is not sufficient. Reliability is the degree to which an assessment tool produces stable and consistent results. Douglas, Language Assessment: Principles and classroom practices. Suggest ways to ensure reliability and validity in in language assessment. Distinguish the different types of validity and reliability in tests and other instruments in language assessment. TSL 3112 – LANGUAGE ASSESSMENT BASIC PRINCIPLES OF ASSSESSMENT RELIABILITY & VALIDITYĢ LECTURE’S OBJECTIVES Explain the difference between validity and reliability. 1 BASIC PRINCIPLES OF ASSSESSMENT RELIABILITY & VALIDITY

Define reliability and validity