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Validating scales and indexes

To determine if your items are empirically related, crosstabulations, correlation coefficients, or both may be used.The third step in index construction is scoring the index.After you have finalized the items you are including in your index, you then assign scores for particular responses, thereby making a composite variable out of your several items.For example, let’s say you are measuring religious ritual participation among Catholics and the items included in your index are church attendance, confession, communion, and daily prayer, each with a response choice of "yes, I regularly participate" or "no, I do not regularly participate." You might assign a 0 for "does not participate" and a 1 for "participates." Therefore, a respondent could receive a final composite score of 0, 1, 2, 3, or 4 with 0 being the least engaged in Catholic rituals and 4 being the most engaged.There are several things to consider when selecting the items.First, you should select items that have face validity.We use cookies to ensure that we give you the best experience on our website.

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For example, if an item is intended to measure religious conservatism, you need to pay attention to what proportion of respondents would be identified as religiously conservative by that measure.That is, the item should measure what it is intended to measure.If you are constructing an index of religiosity, items such as church attendance and frequency of prayer would have face validity because they appear to offer some indication of religiosity.For example, items reflecting depression should not be included in items measuring anxiety, even though the two might be related to one another.Third, you need to decide how general or specific your variable will be.To create one, you must select possible items, examine their empirical relationships, score the index, and validate it.The first step in creating an index is selecting the items you wish to include in the index to measure the variable of interest.For example, if you only wish to measure a specific aspect of religiosity, such as ritual participation, then you would only want to include items that measure ritual participation, such as church attendance, confession, communion, etc.If you are measuring religiosity in a more general way, however, you would want to also include a more balanced set of items that touch on other areas of religion (such as beliefs, knowledge, etc.).Setting up reading intentions help you organise your course reading.It makes it easy to scan through your lists and keep track of progress.

145 comments

  1. Measures of validity for measurement variables Use and misuse - Bland Altman plot. looks at methods of validating scales and indexes whilst Muldoon et al.

  2. An index of quality is a measurement like any other, whether it is assessing a website, as in today's BMJ,1 a clinical trial used in a meta-analysis,2 or.

  3. Measures of validity for measurement. The most widely used analytical techniques for validating. looks at methods of validating scales and indexes.

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