Download Applied Psychometrics Using SPSS and Amos by Holmes Finch, Brian French, Jason Immekus PDF

By Holmes Finch, Brian French, Jason Immekus

ISBN-10: 1681235269

ISBN-13: 9781681235264

The publication could be designed basically for graduate scholars (or complex undergraduates) who're studying psychometrics, in addition to execs within the box who desire a reference to be used of their perform. we might suppose that clients have a few easy wisdom of utilizing SPSS to learn information and behavior uncomplicated analyses (e.g., descriptive data, frequency distributions). furthermore, the reader will be conversant in simple statistical innovations akin to descriptive records (e.g., suggest, median, variance, ordinary deviation), percentiles and the rudiments of speculation trying out. they need to actually have a passing familiarity with matters in psychometrics akin to reliability, validity and test/survey scoring. we can't think any longer than simple familiarity with those concerns, and should commit a component of every one bankruptcy (as good because the complete first bankruptcy) to reviewing a lot of those uncomplicated rules for these no longer acquainted with them. We envision the booklet as being valuable both as a first-rate textual content for a direction on utilized size the place SPSS is the most platform for guideline, or as a complement to a extra theoretical textual content. We additionally expect that readers operating in executive businesses answerable for checking out and size matters on the neighborhood, country and nationwide degrees, and personal trying out, survey and industry study businesses, in addition to school individuals wanting a realistic source for psychometric perform will function a marketplace for the publication. in brief, the readership would come with graduate scholars, school individuals, facts analysts and psychometricians accountable for research of survey reaction information, in addition to academic and mental exams. The aim of the publication is to supply readers with the instruments valuable for assessing the psychometric traits of academic and mental measures in addition to surveys and questionnaires. every one bankruptcy will disguise a subject pertinent to psychometric and size perform, with an emphasis on software. themes could be in brief mentioned from a theoretical/technical standpoint on the way to give you the reader with the history essential to competently use and interpret the statistical analyses that might be awarded consequently. Readers will then be provided with examples illustrating a specific idea (e.g., reliability). those examples will comprise a dialogue of the actual research, besides the SPSS code essential to behavior them. The ensuing output will then be mentioned intimately, targeting the translation of the consequences. eventually, examples of the way those effects could be written up may also be integrated within the textual content. it truly is was hoping that this mix of idea with examples of exact perform will serve the reader either as a pedagogical software and as a reference paintings. To our wisdom, no publication outlining psychometric perform utilizing regularly on hand software program resembling SPSS at the moment exists. provided that many practitioners in academia, executive and personal use SPSS for statistical analyses of trying out info, we think that our e-book will fill a big area of interest available in the market. it is going to include very sensible information about the right way to behavior a wide selection of psychometric analyses, besides pointers on interpretation of effects and the precise structure for reporting those effects. We think that it'll end up invaluable to contributors in academic dimension, psychometrics, and survey and industry examine. Our textual content will upload to the literature by means of delivering clients with a unmarried reference containing the foremost principles in utilized psychometrics with directions and examples for engaging in the analyses in SPSS. furthermore, we'll offer unique macros for estimating numerous data and engaging in analyses universal in academic and mental size.

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Example text

As an alternative to using the mean of dichotomous items, difficulty estimates can also be obtained using the Frequencies menu option under Analyze and Descriptive Statistics. This approach produces frequency tables for all variables specified. 8 Frequencies dialogue box with no items selected. As with the previous dialogue box examples, our first step is to move the desired items from the left hand box to the Variable(s) box on the right, using the arrow button in the middle. 9 Frequencies dialogue box with all items selected.

Extreme Groups Calculation Method The extreme groups calculation method, or the index of discrimination (Crocker & Algina, 1986), is used with dichotomously scored items. It is calculated as the difference between the proportion of the highest scoring (upper) and lowest scoring (lower) groups of examinees obtaining a correct item response. Estimation thus requires first establishing the upper and lower examinee groups, typically based on the total test score.  Items are considered to be performing well when they have relatively large positive discrimination values, meaning a larger portion of the high scoring group responded correctly compared to the low scoring group.

Chapter Summary This chapter introduced some statistical procedures to conduct item analyses based on CTT. These analyses serve as a first step in the examination of the psychometric properties of scale scores. The analyses represent an easy manner in which to estimate the difficulty and discrimination parameters of items and overall reliability for internal consistency. As you have learned, the calculation of the indices is efficient and easy. We have discussed some suggested guidelines, as well, for determining item quality.

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