An introduction to psychometrics and psychological assessment : using interpreting and developing tests An Introduction to Psychometrics and Psychological Assessment is the successor to Coopers prize winning book Psychological Testing: Theory and Practice. This expanded and updated volume shows how psychological questionnaires and tests can be chosen administered scored interpreted and developed. In providing students researchers test users test developers and practitioners in the social sciences education and health with an evaluative guide to choosing using interpreting and developing tests it provides readers a thorough grasp of the principles (and limitations) of testing together with the necessary methodological detail.This book has three distinctive features. First it stresses the basic logic of psychological assessment without getting bogged down with mathematics; the spreadsheet simulations and utilities which are integrated into the text allow users to explore how numbers behave rather than reading equations. Readers will learn by doing . Second it covers both the theory behind psychological assessment and the practicalities of locating designing and using tests and interpreting their scores. Finally it is evaluative. Rather than just describing concepts such as test reliability or adaptive testing it stresses the underlying principles merits and drawbacks of each approach to assessment and methods of developing and evaluating questionnaires and tests. Unusually for an introductory text it includes coverage of several cutting edge techniques and this new edition expands the discussion on measurement invariance methods of detecting quantifying bias and hierarchical factor models and features added sections on:Best practices for translation of tests into other languages and problems of cultural biasAutomatic item generationThe advantages drawbacks and practicalities of internet based testingGeneralizability theoryNetwork analysisDangerous assumptions made when scoring testsThe accuracy of tests used for assessing individualsThe two way relationship between psychometrics and psychological theoryAimed at non mathematicians this friendly and engaging text will help you to understand the fundamental principles of psychometrics that underpin the measurement of any human characteristic using any psychological test. Written by a leading figure in the field and accompanied by additional resources including a set of spreadsheets which use simulated data and other techniques to illustrate important issues this is an essential introduction for all students of psychology and related disciplines. It assumes very little statistical background and is written for students studying psychological assessment or psychometrics and for researchers and practitioners who use questionnaires and tests to measure personality cognitive abilities educational attainment mood or motivation PrefaceChapter 1: Introduction to PsychometricsChapter 2: Tests Scales and TestingChapter 3: The meaning of measurementChapter 4: Administering and scoring Questionnaires and TestsChapter 5: Interpreting ScoresChapter 6: CorrelationsChapter 7: Random errors of measurementChapter 8: Systematic Influences and Generalisability TheoryChapter 9: Test Validity Bias and InvarianceChapter 10: Introduction to factor analysisChapter 11: Performing and interpreting factor analysesChapter 12: Alternative factor analysis designsChapter 13: Developments in Factor AnalysisChapter 14: Network AnalysisChapter 15: Item response theoryChapter 16: Test and scale constructionChapter 17: Problems with test scoresChapter 18: Psychometrics in contextReferencesIndex