1. Reliability Testing for Item Analysis Dr. Debdulal Dutta Roy , Ph.D. Psychology Research Unit Indian Statistical Institute 203, B.T. Road Kolkata - 700108 E-mail: ddroy@isical.ac.in Fax : 91 - 33 - 25776680 Tel (o) : 91 - 33 - 2575 3454 Presentation at the Department of Clinical Psychology, Ram Chandra University, Chennai 21.2.09

3. Reliability Analysis

5. Test retest reliability (8 months interval) Test retest reliability of Reading Motivation Questionnaire (n=72) using both t-test and correlation coefficients 0.93** -0.27 1.01 4.5 1.05 4.46 Total -1.41 0.38 0.83 0.44 0.74 19A 2.43 0.49 0.63 0.41 0.79 16B 0.53 0.35 0.86 0.32 0.89 14B -0.83 0.32 0.89 0.36 0.85 4A 0 0.23 0.94 0.23 0.94 2A -1.41 0.44 0.35 0.44 0.25 1B Knowledge 0.706 -0.23 1.01 4.86 1.14 4.82 Total -2.99 0.26 0.93 0.42 0.78 21A 0.19 0.46 0.69 0.46 0.71 17A -1.84 0.23 0.94 0.36 0.85 9B 1 0.28 0.92 0.2 0.96 7A 0.81 0.45 0.72 0.42 0.78 6B 1.41 0.48 0.65 0.44 0.75 1A Application Correlation t-ratio(df=71) SD Mean SD Mean Second session First session

7. Test-Retest Multi-item response Consistency (8 months interval)

8. Test-Retest Multi-Trait Consistency (8 months interval) After 8 moths Tool: Reading motivation questionnaire (Dutta Roy, 2002); N=72 students of same school

16. Item-Item correspondence: Internal consistency among 42 items of Reading Motivation questionnaire Correspondence Map shows cluster of intrinsic reading motivation items and extrinsic motivation items are scattered widely.

17. Correspondence map of traits