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…

This study investigated the objectivity, reliability, and the validity of the Basketball Throw Test (BTT) as an upper-body muscular strength measure. Participants (33 boys and 32 girls; mean age = 8.75 ± 1.47) performed the BTT on 2 occasions (1-week apart), and the hand-grip test as criterion measure. The objectivity and reliability were…

The changed sentence: The aim of this study was to investigate the reliability and validity of the Emotion Matching Task (EMT) in a sample of Croatian preschool children. The Croatian version of the EMT was applied to 198 children (52% female), together with measures of verbal ability and social competence. The internal structure of the test, as…

The aim of the study was to explore same-sex and opposite-sex friendship functions among 12 to 13- and 16 to 17-year-old Hungarian adolescents (n = 304). To explore perceptions of friendship functions, the McGill Friendship Questionnaire (MFQ, 30 items, 6 factors: stimulating companionship, help, intimacy, reliable alliance, self-validation,…

In recent years, computational thinking has been considered as one of the 21st century skills that all students should have. Researchers emphasize the importance of determining and developing students' computational thinking levels from the earliest possible age. However, no measurement tool has been found in the literature that aims to reveal the…

The objective of this study was to develop and validate an instrument measuring the perception and interpretation of several distinct musical features (pitch, tonality, timing, loudness, and timbre). Therefore, we developed the Implicit Tonal Ability Test (ITAT), a listening test containing 49 multiple-choice items. A total of 233 children aged 6…

With Artificial intelligence (AI) literacy gaining more and more attention at the kindergarten level, it is becoming critical to assess the AI literacy levels of kindergarten children and develop appropriate courses to enhance their foundational AI knowledge and skills. This study proposes and validates a comprehensive AI literacy assessment tool…

Empathy is important for interpersonal communication, social emotion, and social cognitive abilities throughout the lifespan. This study examined the psychometric properties of the Italian version of the Empathy Questionnaire for Children and Adolescents (EmQue-CA) in a sample of 472 Italian children and early adolescents aged 8-13 years.…

The English version of the "Math and Me Survey" was developed to measure mathematical attitudes of elementary students. This study was used to translate, validate and examine the attitudes of Spanish students in the second and fourth grades of primary school. The translation-back translation procedure was adopted. A total of 81 students…

The goals of the present study were to compare the reliability and convergent validity of two reading attitude measures for beginning readers and to get more insight into children's reading attitude around the transition to formal reading instruction. 468 children in kindergarten and Grade 1 completed a more traditional questionnaire based on…

The objective was to assess the psychometric properties of a French-Canadian version of the third edition of the Test of Gross Motor Development (TGMD-3). Participants were 127 French-speaking Canadian children. Results supported the validity-reliability of a bifactor exploratory structural equation modeling representation of the TGMD-3.…

The study aimed to develop and evaluate the psychometrical properties of a new brief measure of gender stereotyping career attitudes. Participants were 222 early and 196 middle adolescents from Croatia. The Vocational Gender Stereotype Attitudes Scale (VGSA) consists of 12 items that represent masculine, feminine and gender-balanced activities…

The current study investigates the reliability and validity of a Saudi-translated version of the GRS-S on a sample of 1,200 Saudi elementary and middle school students. Results showed that the reliability and validity of all six of the GRS-P subscales were high. The results revealed that there were no differences between males and females in all…

Mathematics self-efficacy is considered an important variable in mathematics education because of its links to mathematics achievement. This paper reports on the development of the "Self-efficacy-effort in Mathematics Scale" (SEEMS), an instrument that has strong theoretical and psychometric properties. Based on a sample of n = 224…

This study was aimed to develop an instrument to measure primary and secondary school students' attitudes toward mathematics and to find the underlying dimensions that comprise the attitudes toward mathematics. In addition, it was aimed to examine students' attitudes towards mathematics in terms of gender and grade level variables. For this…