15 VALIDATION

15 Validation Concerning the Construct ( Validation of Internal Structure) by the Technique of Principal Component Analysis (PCA)

23 Validation Concerning the Construct (Validation of internal Structure ) through the Study of the one-dimensionally of Each scale of the test

26 Validation referring to the Criterion : Concurrent of predictive

29 Validation Referring to the Criterion Convergent or Discriminant

33 Validation referred to the Criteria: Validity Coefficient

37 RELIABILITY

37 Calculation of the Coefficient of reliability relating to the internal consistency of a scale Using Cronbach's Alpha Coefficient

43 Calculation of the Coefficient of the coefficient of reliability relating to the internal consistency of a scale using the Strategy of the two parts and using the coefficient of Rulon

45 Calculation of the Coefficient of reliability relating to the Internal Consistency of a scale Using the Strategy of the two halves and using the coefficient of Guttman Flanagan

48 Calculation of the coefficient of reliability relating to the internal consistency of a scale Using the strategy of the two halves and using the spearman-Brown coefficient

50 Method for Increasing the reliability of a test ( or a test scale) Increasing the number of items

52 Calculation of the coefficient of reliability relating to the internal Consistency of a scale Using the matrix of Correlations of the items of the scale

53 Calculation of the confidence interval for the true score of a subject

55 Hypotheses Test for the Cronbach's alpha coefficient in a sample of subject to know whether or not it is statistically Significant

58 Hypothesis test to compare the Cronbach's alpha coefficient in two samples of independent subject

59 Hypothesis test to compare the Cronbach's alpha coefficient in two sample of independent subjects

61 Calculation of the breakpoint (Criterion) Using the Angloff method

62 Calculation of the Reliability coefficient referred to the criterion of Hembleton Novick

64 Calculation of the reliability coefficient referred to the Criterion of Kappa Cohen

67 Hypothesis test of the coefficient of reliability of Livingston referred to a single test and depending on the point of cutting

71 INDEX OF ITEMS

71 Validity Index Item on a Scale

72 Index of difficulty of an item

75 Discrimination Index of an item

76 Homogeneity index of an item

77 DICHOTOMOUS ITEMS

77 Sensitivity Index

78 Specificity Index

81 IRT FOR DICHOTOMOUS ITEMS

81 Advantages of the IRT

82 Requirements for application of the IRT: unidimensionality and local independence

83 Item Characteristics curve (icc)

84 Logistic model 1Parameter logistic model

90 2-Parameter Logistic model

97 3-Parameter Logistic Model

99 IRT ITEMS POLYTOMOUS

99 Introduction

104 Nominal Response Model

109 Partial Credit Model