Concept of Reliability and Validity

Learning Objectives  Discuss the fundamentals of measurement  Understand the relationship between Reliability and Selection  Understand the relationship between Validity and Selection  Learn how Validity is applied in utilizing assessments

The Role of Measurement  Assists the selection manager with understanding an applicants attributes  It involves numbers playing an important role  It is essential to the implementation and administration of selection programs

The Role of Measurement Criteria  Measurement of an employees success on the job  Dollar of sales or dollars saved Predictors  Forms of assessment used to measure criteria  Interviews or Test

The Role of Measurement Predictors:  Background information  Resumes  Applications  Interviews  Tests:  Aptitude or Ability  Achievement  Personality

The Role of Measurement Evaluating Criteria:  Will situation change alter the criteria  Is it realistic and represent the job  Does management accept the criteria

The Role of Measurement Evaluating Predictors:  Does the predictor appear appropriate  Is the cost less than an inaccurate decision  Has it been standardized  Can it be administrated to a group v. an individual

Concept of Reliability Reliability Defined The degree of dependability, consistency, or stability of scores on measures used in selection

Concept of Reliability Factors Influencing The Reliability of a Assessment  Method of Estimating Reliability  Individual Differences Among Respondents  Length of a Measure Test Question Difficulty Administration of a measure

Concept of Validity Validity Defined How well an assessments predicts predicts employee Performance.

Concept of Validity Validity Coefficients Determines the strength of an assessments through using statistical variable*. * -1 to 1

Concept of Validity Validity Coefficients  0 = assessment do not any show relationship to actual job performance  1 = assessment predicts actual job performance

Concept of Validity Factors Influencing Validity of an Assessment  Solid coefficient =.1 and.4  Type of assessment in relationship to the position  The strength of the candidate Pool

Concept of Validity Factors Influencing Validity of an Assessment  Solid coefficient =.1 and.4  Type of assessment in relationship to the position  The strength of the candidate Pool

Concept of Validity Types of Validity Strategies  Criterion-related Validity testing the relationship between the predictor and criterion in relation to job performance  Content Validity Validates those job behaviors that are necessary for successful job performance  Construct Validity Test validation method that determines whether a test measures certain traits or qualities that are important in performing the job