Comments on: Computing Cronbach’s Alpha in SPSS with Missing Data http://www.theanalysisfactor.com/computing-cronbachs-alpha-in-spss-with-missing-data/?utm_source=rss&utm_medium=rss&utm_campaign=computing-cronbachs-alpha-in-spss-with-missing-data Statistical Consulting, Resources, and Statistics Workshops for Researchers in Psychology, Sociology, and other Social and Biological Sciences Fri, 18 May 2012 15:52:44 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Karen http://www.theanalysisfactor.com/computing-cronbachs-alpha-in-spss-with-missing-data/comment-page-1/#comment-2491 Karen Tue, 31 Jan 2012 19:54:50 +0000 http://www.theanalysisfactor.com/?p=1051#comment-2491 Hi Keto, I'm not sure I understand your question. Are you trying to see which questions don't load reliably with the others? And if your data aren't measured on likert scales, how are they measured? Karen Hi Keto,

I’m not sure I understand your question. Are you trying to see which questions don’t load reliably with the others? And if your data aren’t measured on likert scales, how are they measured?

Karen

]]> By: keto http://www.theanalysisfactor.com/computing-cronbachs-alpha-in-spss-with-missing-data/comment-page-1/#comment-2481 keto Sun, 29 Jan 2012 17:58:14 +0000 http://www.theanalysisfactor.com/?p=1051#comment-2481 i want to know can i use chronbach alhpa tool for skipping question not liker t scale? if no what type of tool can i use to measure reliability? Thanx allot i want to know can i use chronbach alhpa tool for skipping question not liker t scale? if no what type of tool can i use to measure reliability?
Thanx allot

]]> By: Don http://www.theanalysisfactor.com/computing-cronbachs-alpha-in-spss-with-missing-data/comment-page-1/#comment-2464 Don Wed, 28 Dec 2011 18:26:10 +0000 http://www.theanalysisfactor.com/?p=1051#comment-2464 SPSS does remove those who do not answer all questions on the survey and mean substitution will effect your variance. You can use relicheck.com. This is an online survey site that has a cronbach analysis as part of the results. The analysis on the site accounts for missing data. SPSS does remove those who do not answer all questions on the survey and mean substitution will effect your variance. You can use relicheck.com. This is an online survey site that has a cronbach analysis as part of the results. The analysis on the site accounts for missing data.

]]> By: Karen http://www.theanalysisfactor.com/computing-cronbachs-alpha-in-spss-with-missing-data/comment-page-1/#comment-2077 Karen Thu, 19 May 2011 15:36:06 +0000 http://www.theanalysisfactor.com/?p=1051#comment-2077 Hi Hannah, If the questionnaires are long (with many items), you may have trouble putting them all in at once (read: SPSS crashes). If the questionnaires are independent of each other, you can do them separately. But remember EM means and correlations are unbiased, but standard errors are too small. If you need accurate standard errors, you'll want a multiple imputation. And to impute cases only if at least 50% present, you'll have to do a work around. There isn't an option in SPSS that I know of to do it directly. Hi Hannah,

If the questionnaires are long (with many items), you may have trouble putting them all in at once (read: SPSS crashes). If the questionnaires are independent of each other, you can do them separately.

But remember EM means and correlations are unbiased, but standard errors are too small. If you need accurate standard errors, you’ll want a multiple imputation.

And to impute cases only if at least 50% present, you’ll have to do a work around. There isn’t an option in SPSS that I know of to do it directly.

]]> By: hana http://www.theanalysisfactor.com/computing-cronbachs-alpha-in-spss-with-missing-data/comment-page-1/#comment-2070 hana Sat, 14 May 2011 13:41:40 +0000 http://www.theanalysisfactor.com/?p=1051#comment-2070 I would like to use EM for my missing values in SPSS. I have data for over 1000 participants, each completing several questioannaires. Do I enter all my data into the EM at once or do i do it seperately for each questionnaire? Also, I would only like values imputed for cases with at least 50% items responded to. How do I do this for EM in SPSS? Thnk you I would like to use EM for my missing values in SPSS. I have data for over 1000 participants, each completing several questioannaires. Do I enter all my data into the EM at once or do i do it seperately for each questionnaire?

Also, I would only like values imputed for cases with at least 50% items responded to. How do I do this for EM in SPSS?

Thnk you

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