Item analysis refers to statistical methods used for selecting items for inclusion in a psychological test within psychometrics which is a field of study concerned with the theory and technique of psychological measurement and it refers to the field in psychology and education that is devoted to testing, measurement, assessment, and related activities.
Within psychometrics, Item analysis refers to statistical methods used for selecting items for inclusion in a psychological test. Psychometrics is a field of study concerned with the theory and technique of psychological measurement. Generally, it refers to the field in psychology and education that is devoted to testing, measurement, assessment, and related activities. 
