Observations and Measurements

important activities of science is measurement. Measurement is a means of quantifying properties for identification. For example, density is the relationship between the mass and volume of a pure substance. One could determine if a piece of yellow metal is gold by determining its density. Measurement allows scientists to make comparisons. Measurement also provides a means by which scientists can judge the reproducibility of an experimental procedure. However, measurement is not an activity that…

In the field of economics, there are many measurements that attempt to quantify the economic wellbeing of an area. Many of which are used like a scorecard in order to try to improve upon itself. However, these measurements, as well as they quantify variable data, they are not without their shortcoming on how they gather their data. Indicators such as unemployment rate, inflation and GDP are vulnerable to misrepresenting the economic climate through issues revolving around how their information…

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…

A constant question to go through a student’s mind is do grades really matter? The often happens when times get tough and grades are the main reason why students get stressed. Most parents think that grades are the key towards an accomplished future overall. Do grades really determine our future? Should we stress them more? Is this a proficient system? First off everyone knows that good grades are key to a successful future. In high school, the SAT is a big test that can determine whether you…

controlled conditions indoors and the sit and reach test is a field based tests though it can be performed indoors too. When testing the validity of the sit and reach test it is hard to be accurate with the results because other factors such as the measurement or the individual’s arm length can play a vital role when it comes to the validity. If the performer isn’t able to get the same results when performing the same test then the validity of the results is not accurate, where as if we were…

The article, When Nothing Is Sure, All Things Are Possible was written by Dr. Deborah D. Canter. The main purpose of this article was for readers to understand “dietetic genealogy”. Dietetic genealogy is the study of dietetics background tracing all history related to the profession. Overall, Dr. Canter’s article was very informative. The profound information regarding historical dietetic information was the most interesting factor. Dr. Canter touched bases on each decade of the 20th century and…

important for professionals who use psychological testing. With that being said, the method attributes the consistency of the test measurements and excludes chance and nonessential factors in the outcome (p. 89). On the other hand, Hays defines that validity compromises the relevant and applicable inferences that are made by the instrument. In fact, these sales of measurements are like a variety of tools…

in behavioral measurement? Validity measurement is important, because it measures the target behavior, measures the duration of the target behavior and any questions that are directed towards that behavior. Validity also makes sure the data was tracked at appropriate times and are relevant to the target behavior(Cooper, Heron & Heward, 2007, p. 103). If none of these elements add up, then the resulted data is compromised, therefore the data is meaningless. Reliability measurements are based…

Does it Screen? Alexander Hamm Period 2 Ms. Ulrich 11/29 (Graphic that represents the lab) Abstract: My experiment is about testing which brand of sunscreen works best, Equate, Banana Boat, or Coppertone. These sunscreens are available at different prices at most any market. The procedures of the experiment were not very complicated, and should be easy to reproduce. First, you put 20 UV sensitive beads into a plastic bag, and put a thick layer of 50 SPF sunscreen on the…

While the manager will need to increase presence during key times, her presence on the unit is part of the manager’s daily routine. Samantha and the manager will have discussed the need for observation when expectations were clarified, and Samantha will understand that observation is necessary to accurately assess her performance. Initial unease should fade as Samantha focuses on her patient and the objective of the conversation. Samantha and her manager will meet regularly to discuss…