I'm a university student studying statistics by 'Discovering statistics using ibm spss 4th edition'
I don't understand what 'content-validity' means even though I read the explanation from the book again and again...
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3$\begingroup$ (+1) If you hover your cursor over the self-study tag, a brief explanation will appear. Clicking on the tag will take you to a lengthier description of its purpose. As far as "content-validity" goes, its meaning is difficult to determine without the context. Perhaps you could supply an extended quotation? Based on extensive experience answering questions here, I can also affirm that any statistics book with "SPSS" in its title is likely to cause more problems than it solves--this one in particular. If you have any option at all, consider using another book for your studies. $\endgroup$– whuber ♦Commented Sep 13, 2015 at 13:48
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$\begingroup$ In response to @Peter's request, the kurtosis question has specifically been asked at stats.stackexchange.com/questions/172467. $\endgroup$– whuber ♦Commented Sep 14, 2015 at 19:03
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Content-validity is a measure of how well your variable(s) measure your desired construct (or value, attribute, proficiency, ability, skill, etc). I think it is helpful if they give examples:
Some measurements can be validated quite easily, such as measuring height in centimetres.
Other measurements, such as emotions or quality of sleep are more difficult. Is sleep only a matter of time slept? Or are there other factors to consider, such as length of REM sleep, consecutive sleep hours, etc. Content-validation is often accomplished using domain expertise. (good link: http://dissertation.laerd.com/content-validity.php)
