Lecture 4: Principles of Psychometrics: Reliability II - jhsph ocw

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i=1…,I indexes groups, j=1,…n i indexes members of group Source of Variation Between Group Within Group I DF Sum of Squares (SS) −1 N − I ∑ ni ( Yi −Y ∑ ∑ ( Yij − 2 ) Y i j i 2 ) Mean Square (MS) MSB = MSW = SSB DF SSW DF F-Ratio MSB MSW
. oneway score1 group Analysis of Variance Source SS df MS F Prob > F ------------------------------------------------------------------------ Between groups 4054.76741 2 2027.38371 2030.92 0.0000 Within groups 1494.39042 1497 .998256793 ------------------------------------------------------------------------ Total 5549.15783 1499 3.70190649
Page 1 and 2: This work is licensed under a Creat
Page 3 and 4: • Review of ANOVA Outline • Int
Page 5: Are the true means for each group d
Page 9 and 10: . oneway score13 group Analysis of
Page 11 and 12: Overview • Unique Design: Each of
Page 13 and 14: Fixed Design • Total Overlap of R
Page 15 and 16: Types of Reliability • There are
Page 17 and 18: Unique Rater Design ICC Equation to
Page 19 and 20: Between Mean Score Variance Degree
Page 21 and 22: Unique Rater Design (cont’d) 2) W
Page 23 and 24: Unique Rater Design Shortcut: Use p
Page 25 and 26: Important Note 1. Reliability is a
Page 27 and 28: Reliability of Individual Scores in
Page 29 and 30: Fixed Rater Design Recall that the
Page 31 and 32: 5 5.5 6 6.5 7 Rater Mean Variance 1
Page 33 and 34: Steps in Stata 1. Calculate overall
Page 35 and 36: Fixed Rater Design Equation to esti
Page 37 and 38: Random Rater Design: Reliability fo
Page 39 and 40: Summary 1. Unique Rater Design: Eac
Page 41 and 42: Question 1 State the conditions und
Page 43 and 44: Question 2 You have developed a new
Page 45 and 46: Question 3 Doesn’t high reliabili
Page 47 and 48: Question 4 Imagine two graphs, Figu
Page 49 and 50: Question 5 Using observed score as
Page 51 and 52: Question 6 Using observed score as
Page 53 and 54: Question 7 Scenario 1: Reported cor
Page 55 and 56: Question 8 A. How are the alpha and
Page 57 and 58:
Question 9 For a ten-item scale wit
Page 59 and 60:
Question 10 Two psychiatrists disag
Page 61 and 62:
Question 11 Measures of self-report
Page 63 and 64:
Question 12 An 10-item ASP measure
Page 65 and 66:
3. Determine how many items to add
Page 67 and 68:
Fixed Effects (a) Set by experiment
Page 69:
• We already saw an example of th
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Lecture 4: Principles of Psychometrics: Reliability II - jhsph ocw

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