PPT-Validity , reliability,

reproducibility of an index test Definitions and A ssessment Clinical practice involves measuring quantities for a variety of purposes such as aiding diagnosis predicting. IB Syllabus Says:. Discuss the validity and reliability of diagnosis. Issues related to diagnosis: . http://. www.youtube.com/watch?v=xYemnKEKx0c. . http. ://. www.youtube.com/watch?v=gu7NDUc5TD4. . TYPE OF RELIABILITY/VALIDITY NUMBER OF PERSONS TO ASSESS Test - Retest Reliability Inter - Interviewer Reliability Inter - Respondent Reliability Concurrent Validity ________________________________ Thinking Questions. What is an IV?. What is a DV?. What is repeated measures design?. What is matched pairs design?. What is independent groups design?. What is a hypothesis? Can you name the 3 types . Reliability gets more attention:. Easier to understand. Easier to measure. More formulas (like stats!). Base for validity. Need for validity. Does test measure what it claims?. Can test be used to make decisions?. A Cheat Sheet. Power Point. What does it mean. Validity . – Depends on the . PURPOSE. . (reaching a conclusion). Must . be . inferred. from evidence. What . you learn from it . Reliability. – The . Reliability gets more attention:. Easier to understand. Easier to measure. More formulas (like stats!). Base for validity. Need for validity. Does test measure what it claims?. Can test be used to make decisions?. Sherwood Brooks. Driftwood Middle School, 2011. We live in time when we are bombarded with information. . A wise in. . consumer must be able to determine which information is trustworthy and what needs to be disregarded.. Validity . Is the translation from concept to . operationalization. accurately representing the underlying concept. . Does your variables measure what you think in abstract concepts.. This is more familiarly called Construct Validity.. . of. . diagnosis. DSM. The . D. iagnostic and . S. tatistical . M. anual of Mental Disorder (Edition 4), was last published in 1994. . The DSM is produced by the American Psychiatric Association. . Jamie DeLeeuw, Ph.D.. 5/7/13. Reliability. Consistency of measurement. The measure itself is dependable.. ***A measure must be reliable to be valid!***. High reliability = greater consistency = lower randomness (error). Basics . What is reliability? . What is validity? . Can you have one without the other? Why or why not? . Reliability. Observed score . = True score random error systematic error. Explain. Why is this important? . Diagnosis. Diagnosis within abnormal psychology means identifying and classifying abnormal behavior on the basis of . symptoms. , . the . patients’ self-reports, . observations. , . clinical tests . Reliability of diagnosis. = the extent to which clinicians agree on the same diagnosis for the same patient. .. The extent to which the same diagnosis is given in different cultures. Reliability in diagnosis. Easier to understand. Easier to measure. More formulas (like stats!). Base for validity. Need for validity. Does test measure what it claims?. Can test be used to make decisions?. Validity. Reliability is a necessary, but not a sufficient condition for validity..