A growing body of cross-linguistic research has suggested that morphological awareness plays a key role in both L1 and L2 word reading among bilingual readers. However, little is known about the interaction and development of L1 and L2 morphological awareness in relation to word reading. We addressed this issue by evaluating the unique…

Using data from the Trends in International Mathematics and Science Study (TIMSS) 2007, this study examined the big-fish-little-pond-effects (BFLPEs) in 49 countries. In this study, the effect of math ability on math self-concept was decomposed into a within- and a between-level components using implicit mean centring and the complex data…

Non-Verbal Learning Disabilities (NVLD) have a relatively rare incidence, estimated to be approximately 1.7% of all learning disabilities. Symptoms of the disorder are perceptual, social and emotional. These symptoms differ according to the developmental age, with 85% of cases being diagnosed in secondary school when education becomes more…

Using the Trends in International Mathematics and Science Study 2003 data, this study built mathematics achievement models of 8th graders in four countries: the USA, Russia, Singapore and South Africa. These 4 countries represent the full spectrum of mathematics achievement. In addition, they represent 4 continents, and they include 2 countries…

The current study aimed at identifying the differences in moral Judgment levels among female students according to their giftedness and grade levels. In specific, the study attempted to answer the following questions: (1) Does moral judgment differ due to the differences in giftedness and grade levels? (2) Is it possible to efficiently predict the…

There has been considerable interest in nonlinear latent variable models specifying interaction between latent variables. Although it seems to be only slightly more complex than linear regression without the interaction, the model that includes a product of latent variables cannot be estimated by maximum likelihood assuming normality.…

This study examines whether MidYIS and YELLIS cognitive ability tests (CATs) are appropriate methods for the identification of giftedness in Design and Technology. A key rationale for the study was whether CATs and able to identify those students with the aptitudes considered of importance to identifying giftedness in Design and Technology and…

A group of seventh- and eighth-grade Italian students with low achievement (LA) in learning English as a foreign language (FL) was selected and compared to a group with high achievement (HA) in FL learning. The two groups were matched for age and nonverbal intelligence. Two experiments were conducted to examine the participants' verbal and…

This study examined the relationship between academic domain specific self-concept (specifically mathematical and verbal) and the academic achievement in mathematics and English of young adolescents. Middle school students in grades seven and eight ranging in age from 12 to 15 years completed three subscales of the Self-Description…

One population at risk of academic failure comprises students who are of average ability, but who score significantly higher in nonverbal aptitude than verbal aptitude. Careful identification and instructional intervention can help these students to perform better. The findings of two studies are presented. The first study was conducted in 1964…

This study examined differences in predicting achievement by sex on the Iowa Tests of Basic Skills (ITBS) from the verbal, quantitative, and nonverbal scores on the Cognitive Abilities Test (CogAT). The sample (n=10,000) consisted of all students in Grades 2, 5, and 8 who completed both tests in fall 1984. Examinations of means and standard…