This meta-analysis reviews 79 studies (N = 46,605) that examined the existence of gender difference on intelligence in school-aged children. To do so, we limited the literature search to works that assessed the construct of intelligence through the Wechsler Intelligence Scales for Children (WISC) batteries, evaluating eventual gender differences…

The purpose of this study is to examine principals' perceptions of their roles as curriculum leaders in high, middle and elementary school levels. This study employs a qualitative design with direct personal interview technique to collect data. Principals from twenty-two high schools, twenty-four middle schools, and thirty-six elementary schools…

Implementation intentions are self-regulatory strategies that increase the probability that desired goals will be achieved. While their effectiveness in the short term is well established in the literature, the long-term effects are not. The present study, which was conducted in France during the COVID-19 lockdown, aimed to test whether reminders…

One of the best-known and most frequently used measures of creative idea generation is the Torrance Test of Creative Thinking (TTCT). The TTCT Verbal, assessing verbal ideation, contains two forms created to be used interchangeably by researchers and practitioners. However, the parallel forms reliability of the two versions of the TTCT Verbal has…

Objective: The key to controlling tobacco use lies in preventing new smokers. Graphic health warnings and plain packaging are policy interventions to discourage cigarette consumption. This study examined the effect of the warning message frame (gain vs loss) and cigarette packaging (branded vs plain) in non-smokers. Methods: Young adult…

A Monte Carlo study was conducted to compare the performance of a level-specific (LS) fit evaluation with that of a simultaneous (SI) fit evaluation in multilevel confirmatory factor analysis (MCFA) models. We extended previous studies by examining their performance under MCFA models with different factor structures across levels. In addition,…

Logistic regression was used to examine the use of Autism Spectrum diagnostic categories from pre-COVID-19 in-person evaluations and COVID-19 telehealth evaluations at a specialist community mental health clinic. The diagnostic classification for children 0-5 (DC: 0-5) affords a wider range of diagnoses that allowed for inferences of clinician…

In the 1980s, Polish schools hardly had access to computers, particularly at the primary and secondary levels. The main reasons were funds and shortage of qualified staff that could handle computer hardware. As a consequence, the youth first came across a computer, how to use it, service hardware, and write programs outside schools in the early…

Population adjustment methods such as matching-adjusted indirect comparison (MAIC) are increasingly used to compare marginal treatment effects when there are cross-trial differences in effect modifiers and limited patient-level data. MAIC is based on propensity score weighting, which is sensitive to poor covariate overlap and cannot extrapolate…

Despite the growing attention to online social comparison, most studies have focused on the psycho-emotional implications of the behavior, leaving the identity implications ambiguous. Given the importance of identity development and the prevalence of social media use among emerging adults going through college transition, this study explored how…

The internal validity of observational study is often subject to debate. In this study, we define the counterfactuals as the unobserved sample and intend to quantify its relationship with the null hypothesis statistical testing (NHST). We propose the probability of a robust inference for internal validity, that is, the PIV, as a robustness index…

Item analysis is performed by developers as an integral part of the scale development process. Thus, items are excluded from the scale depending on the item analysis prior to the factor analysis. Existing item discrimination indices are calculated based on correlation, yet items with different response patterns are likely to have a similar item…

The current study aims to explore the impact of the two-column format in writing simple mathematical arguments. That is to say, a structured method of presenting a mathematical proof or argument by using a tabular layout with two columns. The underlying goal of the research reported in this paper is to inform understanding of how to effectively…

This study reports on comparing the presentation of mathematical content, types of responses required of students, conformity with the curriculum outcomes, and potentially confusing expressions in the subjects of percentages, triangles, and quadrilaterals of fifth-grade mathematics textbooks used in Turkey and Singapore. Document analysis of the…

Goniometry is commonly used to evaluate joint range of motion (ROM). The most widespread method, a manual universal goniometer (UG), is considered time-consuming and difficult to handle. The digital goniometer EasyAngle (EA) was developed to improve and simplify the evaluation of ROM. This study aimed to evaluate the reliability and validity of EA…