Reliability engineering

The values for the Axial length and Keratometry obtained through the various methods as mentioned above should be consistent so as to rule out sources of error. The need to repeat these measurements can be obtained based upon the HOLLADAY CRITERIA which states: Repeat Km if: Km47D for either eye Difference between the two eyes >1 D Corneal cylinder doesnot correlate well with the refractive cylinder Repeat AL if: AL< 22mm AL> 25mm Difference between the two eyes > 0.3 mm Doesnot…

Prompt 2. The purpose of this paper is to discuss the lightness constancy and how it works. Including how the visual system works with constancies, to properly attribute uniform color to a surface. The way to go about the task is with an example. Imagine there are two surfaces next to each other. One appears uniformly white since the light source is evenly distributed throughout the surface. The other has surface patches, a non-uniformity in the light being reflected off of the surface. So…

alarm, leading to a Panorama investigation this week, entitled ‘Could a Robot do my Job?’” Jane Merrick (2015) mentioned in an Independent Newspaper. Although automation seems like a threat they are plenty of positive aspects to it such as the reliability, productivity and job increases. The concept of automation have been tossed around quite a bit lately and wrongfully miss judged at that. Automation is “the state of being operated automatically” according to the…

and reliability is a fairly new phenomenon; it was thought that analyzing the findings was not needed because this particular type of research deals with real-time (interviews or observations). However, it was discovered that researchers showed some form of bias in their studies. The belief is that the studies were bias because most researchers are looking for some form of funding. Therefore, many are now finding themselves having to prove their qualitative studies with validity/reliability…

setting and for assessing the efficiency of management (Center for Substance Abuse Treatment, 1994). The enquiry of reliability looks at the uniformity of the implement to reach the same analytical deductions (Volk, et al., 2007). Reliability denotes to dependability of repeatability of scores and is a sign of unsystematic measurement error (Volk, et al., 2007). The notion behind reliability is that any substantial outcomes must be more than one off from the estimated focal point and be…

Most important type of validity is the Construct Validity. Any research is impossible without employing constructs (Shadish et.al, 2002). In every research, we aim to understand or imagine constructs and measure their indicators to make inferences as well as judgements. Locke (2012) explains that construct validity is nothing but validating such constructs depending on their correlations with other variables that are indicators or theoretically related to the constructs in question. In order to…

Psychological assessment measurements are appraised based on two key measurement constructs: reliability and validity. Reliability of an assessment denotes how consistent the test scores are after repeated executions of the assessment. The reliability of an assessment is necessary and is a foundation to build upon for validity. Validity is the second key measurement construct that deals with the degree to which “the evidence exists to support the various inferences, interpretations,…

In order to be sure that the questions I have made up are reliable, I will use Cronbach’s Alpha. I chose this reliability test because I want to be sure that my questions are all asking questions about the same content and none of them are deterring from the main concept of my study and that my questions are measuring the same thing. After I have determined the reliability test, I then need to confirm that my surveys have validity as well. For a validity test, I will use face validity. I am…

Reliability can be measured by test-retest reliability and Internal consistency reliability. Test-retest reliability is a measure of measurement error by repeating the procedure under the same conditions, and in a short period of time. To demonstrate test-retest reliability, we perform the same test to the same test respondents on two separate occasions. Internal consistency reliability is a measure of how well the questionnaires on the test…

Introduction The novel advancement and growth of information technology to protect patient safety and quality of care with evidence-based research -- practice and health policy start the transformation of research into practice amidst the healthcare organization. According to Polit and Beck (2017), research study is a skillfully organized investigation of variables to explain, manipulate and foresee an experimental event. Data compilation is a critical phase of a research design, inadequate…