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PSYC 355 SPSS Homework 5 Instructions Correlation

A completed SPSS-based homework on correlation analysis, including step-by-step calculations and interpretations.

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    PSYC 355 Page 1 of 12 PSYC 355 SPSS H OMEWORK 5 I NSTRUCTIONS C ORRELATION Part 1 : Green & Salkind : Lesson 31 , Exercises 1 – 4 The following helpful tips are numbered to correspond with the exercise number to which they refer (a dash indicates that no tips are needed): 1. -------- -- (2 pts for output and 2 pts each for a – c ) Descriptive Statistics Mean Std. Deviation N Overall quality as an instructor 4.1670 .59731 50 Overall course quality 3.9310 .64664 50 Number of publications 8.40 11.348 50 Number of times cited by other authors 49.52 57.272 50 Correlations Overall quality as an instructor Overall course quality Number of publications Number of times cited by other authors Overall quality as an instructor Pearson Correlation 1 .638 ** .232 .312 * Sig. (2 - tailed) .000 .105 .028 N 50 50 50 50 Overall course quality Pearson Correlation .638 ** 1 .347 * .372 ** Sig. (2 - tailed) .000 .014 .008 N 50 50 50 50 Number of publications Pearson Correlation .232 .347 * 1 .828 ** Sig. (2 - tailed) .105 .014 .000 N 50 50 50 50 Number of times cited by other authors Pearson Correlation .312 * .372 ** .828 ** 1 Sig. (2 - tailed) .028 .008 .000 N 50 50 50 50

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    PSYC 355 Page 2 of 12 **. Correlation is significant at the 0.01 level (2 - tailed). *. Correlation is significant at the 0.05 level (2 - tailed). 2. Answer this question in sentence form. Include the correlation (r) and degrees of freedom, the p value, and whether these values indicate a significant correlation between the variables or not . (2 pts ) r(48)= .638, p= 0.000001 (or p<0.1 ) df - 2 This is a significant positive linear correlation between the overall course quality and the number of publications . With a correlation significant at the 0.01 2tail, and a significant at the 0.05 level (2 - tail) 3. All homework “Results sections” must follow the example given in the Course Content document “Writing Results of Statistical Tests in Current APA Format” ( N ote: you do not have to refer to a figure) . (2 pts ) Using a correlation rating between the overall course quality, the numberof publications, and the times the material was cited. This is a significant positive linear correlation between the overall course quality and the number of publications. With a correlation significant at the 0.01 2tail, and a significant at the 0.05 level (2 - tail) with an r(48) =.638, p=0.000001 (or p<.01)

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    PSYC 355 Page 3 of 12 -------- -- (2 pts ) 4. Part 2 : 1. A clinical psychologist would like to determine whether there is a relationship between observer ratings of children’s anxious behaviors and scores on an established diagnostic interview assessing anxiety disorders. He administers the diagnostic interview to 28 children and records these scores. He then trains an observer to independently rate anxiety - specific behaviors for each of the 28 children. These ratings are totaled for an overall “anxious behavior” score. On both the interview and the behavioral ratings, a higher score indicates higher levels of anxiety. These scores are listed in the table on the following page . Conduct a Pearson correlation coefficient analysis to determine whether there is a relationship between the interview scores and the behavioral ratings for this group of children. The steps will be the same as the ones you have been practicing in Part 1 of the assignment — the only difference is that you are now responsible for creating the data file as well.

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