Dear Researchers ,,, Long question but I need kindly help to know the difference statistically and its relation regarding methodology.
After read few answers in
https://www.researchgate.net/post/Is_a_quality_of_life_scale_a_quantitative_or_qualitative_variable_What_is_your_opinion_How_should_we_act_with_these_scores
Please I need clear answer (definitions ) regarding 1st & 2nd questions ?
1st question :
Dear Researchers ,,, Is score considered as Qualitative variable , while scale considered as Quantitative one , or are score & scale considered as Qualitative variables ?. I know that Scale is quantitative variable then can be converted to qualitative variable .
Types of Scores ( in ACCESS of ELLs scores) show :
Raw , scale , ELP levels
What does a grade equivalent score mean?
A grade equivalent (GE) score is described as both a growth score and a status score both. ... The GE of a given raw score on any test indicates the grade level at which the typical student earns this raw score.
What are the differences between a score, a grade, a mark, and a point?
Score: A number correct out of a total. Scoring is a fairly mechanical process. The number of points, goals, runs, etc. achieved in a game or by a team or an individual.
Grade: A general assessment based to an extent on subjective assessment, and perhaps involving a number of different aspects of performance. Could be a number, a letter - to be honest, it could even be a colour as long as someone has set out the significance of each result.
A particular level of rank, quality, proficiency, or value.
Mark: A number, typically xx%. A pseudo-scientific version of grade
The definition of a mark is a sign, symbol, indication or a stain. An example of a mark is a bruise from being hit. verb.
Point: likely Grade explanation.
A point is an exact position or location on a plane surface. It is important to understand that a point is not a thing, but a place. We indicate the position of a point by placing a dot with a pencil.
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2nd question :
Score , Scale ( statistical analysis of them ) ?
VAS scale of pain ?
5 or 7 Likert Scale ?
Quality of life score ?
- Test Scores
- Norm-referenced vs. Criterion-referenced
** https://stats.idre.ucla.edu/other/mult-pkg/whatstat/what-is-the-difference-between-categorical-ordinal-and-interval-variables/
Why does it matter whether a variable is categorical, ordinal or interval?
Sometimes you have variables that are “in between” ordinal and interval, for example, a five-point likert scale with values “strongly agree”, “agree”, “neutral”, “disagree” and “strongly disagree”. If we cannot be sure that the intervals between each of these five values are the same, then we would not be able to say that this is an interval variable, but we would say that it is an ordinal variable. However, in order to be able to use statistics that assume the variable is interval, we will assume that the intervals are equally spaced.
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3rd question :
what does the following means ? (( numeric variable with interval scale, not ratio scale ))... Taken from (researcher : Marzieh Nojomi ) >>>> We change the quality of life to a numeric variable with interval scale, not ratio scale, So, of course when somebody has a score of 50 in a study using SF36 questionnaire, it does not mean that he/she has a QoL twice as much as a person having a score of 25, because our scale does not have a real zero. We have to consider, comparison of QoL score between groups has an important role.
Scale is a combined variable , discrete quantitative that could be ordinal qualitative type of variable. While score as I understand is qualitative variable.
Quantitative variables can be converted to qualitative type when researcher detect cut-off point . The Question : How to detect and calculate cut-off point ( if there is no previous researches ) ?. As I know it can be calculated / estimated from MedCalc statistical programme , but is this programme in all such cases ? Are there other programs ?
So regarding score researcher can use : Factor Analysis (Principal Components Analysis).
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