Test validity

was the beginning of how to create a test and what is needed for a test to be considered “good”. Two important factors that help determine if a test will be good is understanding norms and reliability. Figuring out a norm group for a test is really crucial because it is a sample of examinees who are the representative population of people the test is intended to measure. This information is important because you do not want to give a test that is meant for an age group of 3-6 year olds to someone who is 23; the test would not measure what it was intended to or get the right result. Also, it gives a guideline to where someone in the average range should be scoring and if they are not, figuring out a reason why…

intelligence or achievement test? The main objective of an intelligence or achievement test is used to classify people in a particular category or to help us identify people that have a particular characteristic. In order to consider the test credible it has to meet three important requirements: validity, reliability and standardization. If it does not meet these characteristics, we cannot be sure to trust in the conclusions or results of the evaluation. How do we make sure the test is reliable?…

Tests need to be accurate (i.e. valid) for the researcher to know the test can be trusted. Tests have a concept or framework that guide what the test is supposed to measure. Construct-based validity evidence is used to measure to the degree that the test is measuring that construct. This type of validity has two subparts: discriminant validity and convergent validity. When constructs are not supposed to be related, discriminant validity checks to see if they are in fact unrelated. On the other…

Woodcock Johnson Tests of Achievement In 2014, Fredrick A. Schrank, Nancy Mather, and Kevin S. McGrew released the Woodcock-Johnson IV Tests of Achievement (WJ IV). The newest release was expanded and is now composed of three parts: the WJ IV Tests of Cognitive Abilities, the WJ IV Tests of Achievement, and the WJ IV Tests of Oral Language. The individually administered test can be administered in parts and can each be used independently or in any combination to identify academic strengths…

Appendix B). Validity and Reliability An instrument is valid when it measures the construct it was designed for, and reliable when an instrument can consistently produce the same results over time, across different situations (Field, 2003). Content validity is an evaluation of the relationship between the items and the construct being measured (Cook & Beckman, 2006) and can be done in two ways. Firstly, a thorough revision of the construct would be required to avoid any ambiguities when…

A model which parallels numerous symptoms of human depression is considered important. It is well known that animal models should share phenomenological similarities isomorphism with the human pathology to be modeled. In other words we can say that it is phenomenological similarities between the behavior shown by the animal model and the particulars symptoms of the human condition (Geyer and Markou 1995; Moreau 2002; Lyon 2004) .The face validity of animal model of depression is a determination…

Validity speaks to the magnitude to which the interpretations of test scores are grounded in theory and evidence. Validity is one of the most fundamental things to think about when evaluating psychological test. The question of validity can be expressed from three different perspectives, purpose of the test, the form the test comes in and the population being served. Therefore, researchers should never say “the test is valid.” Instead, researchers should state that the test is valid enough…

Conclusion Validity 4. External Validity The first type of validity is Internal Validity. “Internal Validity is the approximate truth about inferences regarding cause-effect or causal relationships” (Trochim, 2006). You would not use Internal Validity for an observational study but Internal Validity would be appropriate to assess a social program’s effectiveness. You want to know that your program is successful and that you have evidence that what you did in the program caused specific…

A panel of experts is needed to review the instrument, and determined the validity and reliability. The group discussion was an example of panel of experts, who determined the content of validity and reliability between the items composing in the instrument. The reliability was conducted before the expert panel review, which for this assignment were my classmates. The panel of experts provided suggestions with regard to improving the instrument’s readability (Sharma & Petosa, 2014). My…

Test Design and Evaluation Participants Two groups of participants will be recruited; a control group consisting of healthy American soldiers and an experimental group consisting of American soldiers who sustain a concussion. Participation will be voluntary and participants should be free of any history of concussion or cognitive impairment. Due to the disproportionate gender representation of soldiers only men will be included and participants have to be between 18-50 years. The study will…