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Principles of test cunstruction
Transcript of Principles of test cunstruction
Evidence that the test measures what it purports to measure.
Evidence that the test does not measure irrelevant attributes.
Factors to consider when constructing a good test!
The extent to which a questionnaire, test,
observation or any measurement procedure
shows the same results on repeated trials.
Refers to the economy of time, effort and money in testing.
- Easy to design
- Easy to administer
- Easy to mark
- Easy to interpret (the results)
A test is valid "if it measures accurately what it is intended to measure" (hughes, A., 1989)
Usefulness of the test for a given purpose.
A valid test is always reliable!
Does the test measure what it is supposed to measure?
Validity of a test
A test with HIGH validity has items closely linked to what it (the test) is intended to assess.
A test with LOW validity does not measure what it ought to
Reasons of Harmful Backwash
Lack of reliability
The need for tests
How to achieve a beneficial Backwash?
Test the abilities whose development you want to encourage
Make testing criterion-referenced
Base achievement tests on objectives
When is necessary, provide assistance to teachers
Types of Validity
Match between test items and the content or subject area the instrument is intended to assess.
Experts will review all of the items for readability, clarity and comprehensiveness and agree which items should be included in the final instrument.
Seeks agreement between subject-matter theories and the specific measuring components of the test.
Requires the compilation of multiple sources of evidence.
Accuracy of a measure by comparing it with another process or method which has been demonstrated to be valid.
Review of test items does not require formal procedures.
Anyone can rate the validity of the test through informal opinion.
Types of Reliability
Two items measure identical concepts at an identical level of difficulty.
The agreement of measuring instruments over time.
To determine stability, a measure or test is repeated on the same subjects at a future date.
The extent to which items on the test or instrument are measuring the same thing.
The extent to which two or more individuals (coders or raters) agree.
INSTITUTO PEDAGÓGICO DE CARACAS
UNIVERSIDAD PEDAGÓGICA EXPERIMENTAL LIBERTADOR
DEPARTAMENTO DE IDIOMAS MODERNOS
CÁTEDRA DE EVALUACIÓN
CURSO: EVALUACIÓN EN EL PROCESO DE ENSEÑANZA DEL INGLÉS COMO LENGUA EXTRANJERA
Caracas, January 2013
Elaborated by Angel E. Bello, Karla Landaeta and Javier Tapia.
Principles of test construction
The stability or consistency of scores over time or across raters.
Usefulness of test scores to predict future performance.
Correlation between test scores and course grades
What's a test?
A method to determine a student’s ability to complete certain tasks or demonstrate mastery of a skill or knowledge of content.
Language testing. (2009) Available: http://eva.utpl.edu.ec/openutpl/ocw/mod/resource/view.php?id=2851 [Retrieved: 2013, October 21st]
College board. (2013) Validity evidence. Available: http://research.collegeboard.org/services/aces/validity/handbook/evidence [Retrieved: 2013, October 21st]
Magdalena, J. Validity, Reliability and Practicality (2010) Available: http://www.slideshare.net/Samcruz5/validity-reliability-practicality [Retrieved: 2013, October 22nd]
Keys to effective testing. (2012) Available: http://www.slideshare.net/VanzJustine/keys-to-effective-testing [Retrieved: 2013, October 22nd]
Cardozo, R., Magdalenga, J. Evaluación en el proceso de enseñanza del inglés como lengua extranjera (2011) Available: http://www.slideshare.net/Samcruz5/evaluacn-ile-introduction-to-the-course-preliminaries-7577959 [Retrieved: 2013, October 20th]