Response Scales
Date: Wednesday, September 22 @ 11:09:42 IST
Topic: Biostatistics


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The response which is graded by an observer on an agree or disagree continuum is based on:

1.Visual analog scale.
2.Guttman Scale.
3.Likert Scale.
4.Adjectival scale.



Answer
3.Likert Scale.

Reference
http://www.ndhcri.org/pain/Tools/Visual_Analog_Pain_Scale.pdf
http://trochim.human.cornell.edu/kb/scalgutt.htm
http://trochim.human.cornell.edu/kb/scallik.htm
http://acl.ldc.upenn.edu/P/P93/P93-1023.pdf

Quality
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Status
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QTDF
Some book for Statisticians

Discussion

Visual Analog Scale
The Worst Imaginable Pain
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No Pain

Instructions: Show and read the pain scale to the patient. Explain to the patient to place a mark along the line to indicate their current pain level. Wait for a verbal reply or for the patient to mark their current level of pain. Repeat the directions if the patient is having difficulty; use words other than "pain": aching, cramping, sore, uncomfortable, stiff, dull, pressure, burning, shooting. If the patient does not like it or understand it, switch to another pain rating scale. Always use the same scale for each follow-up assessment. Document the scale used as the Visual Analog Scale.

More at http://www.ndhcri.org/pain/Tools/Visual_Analog_Pain_Scale.pdf

Guttman Scale
Guttman scaling is also sometimes known as cumulative scaling or scalogram analysis. The purpose of Guttman scaling is to establish a one-dimensional continuum for a concept you wish to measure

More at http://trochim.human.cornell.edu/kb/scalgutt.htm

Likert Scale
You're now ready to use your Likert scale. Each respondent is asked to rate each item on some response scale. For instance, they could rate each item on a 1-to-5 response scale where:
1. = strongly disagree
2. = disagree
3. = undecided
4. = agree
5. = strongly agree

There are a variety possible response scales (1-to-7, 1-to-9, 0-to-4). All of these odd-numbered scales have a middle value is often labeled Neutral or Undecided. It is also possible to use a forced-choice response scale with an even number of responses and no middle neutral or undecided choice. In this situation, the respondent is forced to decide whether they lean more towards the agree or disagree end of the scale for each item.

More at http://trochim.human.cornell.edu/kb/scallik.htm

Adjectival Scale
A linguistic scale is a set of words, of the same grammatical category, which can be ordered by their semantic strength or degree of informativeness (Levinson, 1983). For example, lukewarm, warm, and hot fall along a single adjectival scale since they indicate a variation in the intensity of temperature of the modified noun
In the case of adjectives, the above definition is commonly relaxed to replace the total order among the elements of the scale by a partial one, so that the elements of the scale may be partitioned into two groups (sub-scales), within each of which the order is total. The two sub-groups correspond to positive and negative degrees of the common property that the scale describes. For example, the set of adjectives {cold, lukewarm, warm, hot} are normally considered part of one scale, even though no direct ordering of semantic strength exists between cold and hot.

More at http://acl.ldc.upenn.edu/P/P93/P93-1023.pdf

Explanation
1.Visual analog scale is often used in Anaesthesia.
2.Guttman Scale is a measurement scale.
3.Likert Scale is an ORDINAL scale used in behavioral sciences and psychiatry.
4.Adjectival scale can be used for a whole lot of purposes (including remarking about this book ).

Comments
In the past questions like these were forgotten (or the choices forgotten) and we had no opportunity to analyse these. But now, since the question papers are given out, questions like these pop out

Tips
If you get a question like this; don’t panic; don’t think too long and waste your precious time (40 seconds for each question in AIPG Exam). Most will not attend this question and these questions will not be a decider


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