Reliability engineering

(Salvia, J, Ysseldyke J E, & Bolt, S (2013). Task 2. (a) What is the meaning of, and relationship between, “reliability” and “validity” ? • Reliability is the extent to which a measuring tool gives consistent results. Reliable means to be consistently accurate, also describes as the absence of random error during measurement. There are three types of reliability: items of reliability, stability, and interobserver. • Validity is the extent to which a measuring tool measures what is…

component to literacy. One of the standardized tests developed to measure phonological processing is the Comprehensive Test of Phonological Processing (CTOPP), it was published in 1999. In this paper we will discuss the purpose, normative sample, reliability and validity of the CTOPP. The CTOPP is used to identify individuals ages 5 years to 24 years and 11 months, who are significantly below their peers in important phonological abilities. Due to the wide age range covered…

General Information The Personality Assessment Inventory (PAI) was developed by Leslie C. Morey Ph.D. in 1991 and revised in 2007. It is published through Psychological Assessment Resource and is a multidimensional objective inventory designed to measure psychopathology and treatment planning for various psychopathological conditions. The current PAI form is not a revision of normative data, test form, or interpretative guidelines from the original 1991 edition. The current version reflects the…

after identifying this the non-significant scores the scale variable was updated bringing the total from 15 questions to 11. After conducting a discriminative analysis, a Cronbach’s alpha was conducted this refers to a measure used to determine the reliability or consistency of a scale (using and interpreting Cronbach 's alpha, 2016), for a Cronbach 's alpha to be significant it has to be above 0.7, a Cronbach 's alpha of .126 was found, this shows that the items on the scale are measuring the…

Reliability and validity are important factors; they are key factors for having a good test. Reliability is when your test is consistent, whereas validity is the accuracy of your test. You can have a reliable test, yet not valid, but you cannot have a valid test without it being reliable. Here is an example of how reliability and validity work together. Let’s say your scale is 5lbs off, if you weigh yourself it will consistently weigh you 5 lbs off, this is reliability. Validity is your test…

Governess had claimed to see Peter Quint at the window, though Miles cannot see anything; frightening Miles eventually dies of a heart attack and unable to comprehend the accusations the Governess had put upon him. Is the Governess a source of reliability? Or a woman who has gone crazy, and made up these fake illusions of these spirits to justify her actions? That is left to the choice of the reader, of what to think of the Governess. As the reader, I believe the Governess is a mad woman. But…

of sound assessment practice namely reliability, feasibility and educational impact. Reliability Reliability refers to the ‘reproducibility’, ‘repeatability’ or ‘consistency’ of the scores obtained from an assessment (Memon et al, 2010; van der Vleuten et al, 2005). Reliability is generally expressed as a coefficient ranging from 0 (no reliability) to 1 (perfect reliability). Since it is difficult to achieve perfect reliability in any assessment, a reliability coefficient of 0.80 is regarded as…

“The Yellow Wallpaper” The narrator in “The Yellow Wallpaper” is unreliable, moves from one shift to another also being reliable; the narrator adds on to the story with the yellow wallpaper and identifying a woman trapped and the story would change dramatically if it were told by an omniscient narrator. The narrator in “The Yellow Wallpaper” is unreliable and moves from one state to another also being reliable; lastly, in the end of the story the narrator continues on being an unreliable…

Wrist and upper-arm blood pressure monitors are mainstays of the blood pressure monitor industry, but some people find them a little bit too bulky or intimidating to be of any use. Finger blood pressure monitors provide a welcome and handy (no pun intended) alternative to these more popular models. A lot of people are suspicious of finger blood pressure monitors and believe them to be unreliable and ineffective when it comes to delivering a reliable reading of one’s blood levels. While it is…

Test-retest reliability can be a useful assessment for a survey instrument. “Test-retest reliability provides information on how consistent a measure is when it is administered twice in a relatively short time frame. The appropriate length of that time frame will vary with both the instrument and the target population” (Krysik & Finn, 2013, p.266). In addition, the interval needs to be extended so that the subject cannot recall the answers and short enough to make sure that no changes occur in…