Psychometric methods Sample Clauses

Psychometric methods. Psychometrics is concerned with the theory and techniques for measurement and originated during the 19th century in psychological measure development (Sokal 1971). The primary concern of psychometrics is the measurement of personal attributes and traits (e.g. intelligence), many of which are not possible to measure directly and are therefore considered latent variables. It has two main foci for research; firstly, the development and refinement of theoretical approaches to measurement and secondly, the construction of measures and procedures for measurement (▇▇▇▇▇▇▇▇ and ▇▇▇▇▇▇ 2003; ▇▇▇▇▇▇▇▇ 2003b). Psychometrics has a long history in the identification of methods for the development of questionnaires and measures in psychology and education (e.g. intelligence). Its techniques have subsequently been used in the development of many clinical instruments both in rehabilitation and other fields (▇▇▇▇▇ et al. 1996; ▇▇▇▇▇▇ et al. 2001; ▇▇▇▇▇▇▇ et al. 2005). Psychometric methods based on CTT are widely used and have been developed and applied in many measures of latent variables (Lord and ▇▇▇▇▇▇ 1968). Other methods have been developed, which are argued to more directly represent measurement of latent variables without the assumptions inherent in CTT. Item response theory (IRT) is the general term used to describe these methods, which include approaches such as ▇▇▇▇▇ analysis and Mokken analysis.