Item response theory (IRT) refers to a family of mathematical models which describe the relationship between latent continuous variables (attributes or characteristics) and their manifestations (dichotomous/polytomous observed outcomes or responses) with regard to a set of item characteristics. Researchers typically use parametric IRT (PIRT)…

In recent years, some models for binary and graded format responses have been proposed to assess unipolar variables or "quasi-traits." These studies have mainly focused on clinical variables that have traditionally been treated as bipolar traits. In the present study, we have made a proposal for unipolar traits measured with continuous…

This study investigated the application of item quadruplets to control social desirability in measuring socio-emotional competencies and their relationship with intelligence. Quadruplets involve four variations of an item, differing in the polarity of their descriptive content and evaluative content (social desirability): positive-desirable,…

Many psychological scales written in the Likert format include reverse worded (RW) items in order to control acquiescence bias. However, studies have shown that RW items often contaminate the factor structure of the scale by creating one or more method factors. The present study examines an alternative scale format, called the Expanded format,…

The Stirling Children's Well-being Scale (SCWBS) was developed by the Stirling Council Educational Psychology Service (UK) as a holistic, positively worded measure of emotional and psychological well-being in children aged eight to 15 years. Drawing on current theories of well-being and Positive Psychology, the aim was to provide a means of…

The TCU Short Forms contain a revised and expanded set of assessments for planning and managing addiction treatment services. They are formatted as brief (one-page) forms to measure client needs and functioning, including drug use severity and history (TCUDS II), criminal thinking and cognitive orientation (CTSForm), motivation and readiness for…

Modern factor analysis is the outgrowth of Spearman's original "2-factor" model of intelligence, according to which a mental test score is regarded as the sum of a general factor and a specific factor. As early as 1914, Godfrey Thomson realized that the data did not require this interpretation and he demonstrated this by proposing what became…

A method for the construction of scales which combines the rational (or intuitive) approach with an empirical (item analysis) approach is presented. A step-by-step procedure is provided. (Author/JKS)

In the original item factor analysis of the Adjective Check List, evidence was found for seven main factors. In this cross-validation study, five of the seven factors were replicated: social desirability, introversion/extroversion, internal discomfort, cognitive independence, and social attractiveness. Tables with factor loadings are presented.…

In the development of the Bem Sex Role Inventory (BSRI) the phrase "more desirable in American society" was used in the final item selection. To clarify whether subjects tended to interpret this phrase normatively or prescriptively, a sample of 432 college men and women used the items of the BSRI to describe either a typical (normative),…

Position adopted in this study was that the underlying structure of what has been thought of as the masculinity-femininity variable is multidimensional, that a more valid description of MF would thus reveal a pattern and not a score. (Authors)

An attempt is made to indicate why the concept of "true score" naturally leads to the belief that test validity must increase with an increase in test and/or average item reliability, and why this is correct for the classical single-factor model first introduced by Spearman. The statistical model used by Loevinger is introduced to…

An experimental study examined the possibility that proximity error could bias results from semantic differential questionnaires. Proximity error occurs when, due to the ordering, or polarity, of the differential scales, one answer on the semantic differential results in another answer to a subsequent question being substantially changed from what…

The School Anxiety Questionnaire (SAQ) is a 105-item, multiple-choice instrument designed to measure five aspects of anxiety behavior: 1) Recitation Anxiety; 2) Test Anxiety; 3) Report Card Anxiety; 4) Achievement Anxiety; and 5) Failure Anxiety. The five scales are typically 13 or 14 items in length and have reliability in the middle to high…