Background: There is extremely limited population-based research on social (pragmatic) communication disorder (SCD). Population-based samples have the potential to better characterize the SCD phenotype by mitigating confounds and biases that are typical of convenience and clinical samples. Aims: The aims of this preliminary epidemiologic study…

Background: Math anxiety (MA) is a worldwide appearing academic anxiety that can affect student mental health and deter students from math and science-related career choices. Method: Using the Arabic version of the Modified-Abbreviated Math Anxiety Scale (m-AMAS), the prevalence of MA was investigated in a very large sample of students (N = 10093)…

The major objectives of our study were (a) to identify student profiles according to five homework characteristics (homework time, frequency, quality, interest, and favorability) and (b) to examine their relationship with three critical variables in the homework process--homework effort, completion, and math achievement. Latent profile analysis…

Private supplementary tutoring is a widespread phenomenon. However, evidence that private tutoring has positive effects on academic achievement or about the specific conditions of successful private tutoring is rare. Adapting Carroll's (1963) model for school learning to private tutoring, we expected to find positive effects of tutoring duration,…

The purpose of this study was to examine the relationships among homework time, homework frequency, and learning achievements of Taiwanese students. Applying a 2-level hierarchical linear modeling on the TIMSS 2007 and 2011 data, our findings were as follows: (1) Within the context of TIMSS 2007 and 2011 students, the frequency of mathematics…

This study theorizes and tests moderators (perceived availability of marijuana and age-group) of the association between adolescents' frequency of marijuana ad exposure and past-year marijuana use. To test this model, I analyzed national survey data from 9,024 American adolescents with hierarchical regression techniques. Results showed that being…

South Australian Secondary Mathematics teachers consider their testing parameters (duration and frequency) to be consistent with teachers elsewhere in the state, however, formal evidence is not available. A review of literature presented similar gaps in this evidence in other jurisdictions in Australia. The logic model that underpins the resource…

Monitoring the Future (MTF) has become one of the nation's most relied upon scientific sources of valid information on trends in use of licit and illicit psychoactive drugs by U.S. adolescents, college students, young adults, and adults up to age 60. During the last four decades, the study has tracked and reported on the use of an ever-growing…

This study used nationally representative data from the 2011 National Assessment of Educational Progress (8th-grade Science) and the 2018 National Survey of Science and Mathematics Education toward two primary purposes: (1) to examine the association between teachers' formal (university) content preparation in science and student outcomes in…

Nomophobia, a type of technological addiction defined as the fear of being deprived of a smartphone, is quite prevalent in young individuals with the widespread use of mobile phones. This study aims to determine the nomophobia level of secondary school 8th-grade students. The effect of nomophobia on academic achievement was investigated by…

This study investigates whether potential differences in the weight of out-of-school and in-school learning environments affect the acquisition of L2 English by teenagers in two geographical contexts, more and less English-rich, and with less and more linguistic distance to English, respectively. Participants were two groups of 14-15-year-olds,…

Student victimization by school staff members has important potential consequences for students' academic achievement and physical and psychological outcomes. Several studies have shown that such victimization exists in multiple contexts and there is considerable variation in prevalence among contexts. This study examined the prevalence of student…

Monitoring the Future (MTF) is a long term study of substance use and related factors among U.S. adolescents, college students, and adult high school graduates through age 60. It is conducted annually and supported by the National Institute on Drug Abuse. MTF findings identify emerging substance use problems, track substance use trends, are…

This study examined bullying and cyberbullying among 185 middle school students in 4 urban middle schools in Ohio. Nearly 60% of the sample was female, and 67% of the sample was not Caucasian. The results indicated that bullying and cyberbullying are prevalent in this population. Approximately 44% of 6th-grade students felt terrible about…

In response to media reports of increased teasing and bullying in schools following the 2016 U.S. presidential election, we investigated its prevalence with a Virginia school climate survey completed by approximately 155,000 seventh- and eighth-grade students in 2013, 2015, and 2017. Survey results were mapped onto presidential election results…