To illuminate individual differences in the development of attention-deficit hyperactivity disorder (ADHD) symptoms in the general population, psychometric measures are needed that can capture general population-level symptom variation reliably, validly, and comparably from childhood through to the transition to adulthood. The ADHD subscale of the…

Purpose of the research: it is aimed to examine whether the levels of altruism of Physical Education and sports teachers differ according to some variables. This research consists of a total of 126 teachers, 35 women and 91 men, who work as physical education and sports teachers at primary education secondary grade and secondary schools in Kütahya…

Writing motivation is a multidimensional construct that has been demonstrated to be of great importance in writing performance and growth. Yet, much of the extant research has failed to examine the nuances of the various dimensions of writing motivation--in particular, task competency beliefs--and has neglected to investigate how the various…

Writing motivation is a multidimensional construct that has been demonstrated to be of great importance in writing performance and growth. Yet, much of the extant research has failed to examine the nuances of the various dimensions of writing motivation--in particular, task competency beliefs--and has neglected to investigate how the various…

The objective of this study was to adapt the Teaching Engineering Self-Efficacy Scale (TESS) to Turkish through comprehensive validity and reliability assessments and to analyze science teachers' (specializing in science, physics, chemistry, biology) Teaching Engineering Self-Efficacy (TES) beliefs concerning various variables. The study employed…

According to (inter)national policy and curriculum documents, the acquisition of research skills is an important objective of secondary education. However, the conceptualization and hence the operationalization of this concept seems ambiguous. Furthermore, no test exists to assess students' proficiency in (a broad range of) research skills in a…

In this study, we examined the factor structure, reliability, and external validity of scores from the Comprehensive Test of Nonverbal Intelligence-Second Edition (CTONI-2) using an independent sample of young adults currently enrolled in a postsecondary institution. Although the subtests appear to be measuring general intelligence, the aggregate…

The implementation of data-driven decision-making practices (DDDM) is a key component of contemporary teachers' professional practice. As such, the measurement of DDDM and related constructs is important for multiple purposes in both research and practice (e.g., identifying teacher needs around DDDM, and monitoring teacher change in response to…

Children's theory of mind (ToM) is typically measured with laboratory assessments of performance. Although these measures have generated a wealth of informative data concerning developmental progressions in ToM, they may be less useful as the sole source of information about individual differences in ToM and their relation to other facets of…

Epistemic curiosity (EC) is the desire to obtain new knowledge capable of either producing positive experiences of intellectual interest (I-type) or of reducing undesirable conditions of informational deprivation (D-type). Although researchers acknowledge that there are individual differences in young children's epistemic curiosity, there are…

The Reflective Functioning Scale (RFS) was developed to assess individual differences in the ability to mentalize attachment relationships. The RFS assesses mentalization from transcripts of the Adult Attachment Interview (AAI). A global score is given by trained coders on an 11-point scale ranging from antireflective to exceptionally reflective.…

This article describes the development and evaluation of a short form of the 24-item Adaptation to Age-Related Vision Loss (AVL) scale. The evaluation provided evidence of the reliability and validity of the short form (the AVL12), for significant interindividual differences at the baseline and for individual-level change in AVL scores over time.…

Presents data showing that the MacArthur Communicative Development Inventory's (CDI) large variability, lack of stability, and insufficient ability to predict early language delay are authentic reflections of individual differences in early language development rather than measurement deficiencies. Responds to critiques regarding sociodemographic…

A new 22-item measure of an individual's tolerance for ambiguity, the Multiple Stimulus Types Ambiguity Tolerance (MSTAT-I), is described. The measure addresses characteristics of ambiguous stimuli and reactions to perceived ambiguity. Evidence from 148 undergraduates for reliability and convergent and discriminant validity is presented in support…

Measurement and psychometric quality of the Sternberg task (S. Sternberg, 1966, 1969), a memory search task, was investigated with 78 undergraduates. Individual performance was fairly homogeneous across responses, fairly unstable over time, and fairly stable across stimulus content. Implications for individual differences research are discussed.…