The purpose of this study was to examine the factorial invariance of the ASIS (Anadolu Sak Intelligence Scale) across gender. Raw scores from the ASIS standardization study (N = 4641) were used in the analyses. Factorial invariance was analyzed by gender across three age groups: 4-7 (N = 2528), 8-9 (N = 848), and 10-12 (N = 1265) using the…

Using a sample of healthy youth (n = 466, 10 to 18 yr), we report the predictive utility of vertical jump power (VJ Power, W) for predicting bone strength. We measured VJ Power using mechanography and an indicator of bone strength, i.e., height-adjusted total bone mineral content less head (TBLH BMC, g), using DXA. Growth curve models were used to…

The present study examined younger and older children's perceptions of friendship characteristics and expectations from best friends. One hundred and eighty eight children (Mage = 8.51 years old, SD = 1.70, age range: 6-11 years old) from two primary schools of Athens were involved in a 15-min semi-structured interview and produced drawings of…

Background: Fundamental Motor Skills (FMS) are important building blocks for children's sport-participation and lifelong physical activity. In the last decade, several international studies have reported delays in the development of FMS. To get better insight into the Dutch situation and to provide future directions, this study examined the…

Our ability to perceive our own and other people's bodies is critical to the success of social interactions. Research has shown that adults have a distorted perception of their own body and those of other adults. However, these studies ask perceivers to estimate for adults with a similar bodily make-up. This study explored the developmental…

We developed age- and sex-specific smoothed percentiles for vertical and long jump, as well as vertical jump power, in healthy 10-18 year olds (n = 529, 47.1% female). Jump height and distance were measured and vertical jump power was assessed via mechanography. LMS regression was used to create smoothed age-specific reference curves, separated by…

This study evaluated test-equating methods to enable comparisons and conversions between the vertical jump (VJ) and standing long jump (SLJ) tests. A total of 528 youth (280 males) performed VJ and SLJ, and their scores were randomly split as the calibration (C) sample (n = 478) and cross-validation (CV) sample (n = 50). SLJ scores of the C sample…

Understanding predictors of parents' willingness to vaccinate their children appears fundamental to promote vaccine acceptability, especially in a pandemic scenario. The present study aimed to investigate the role of conspiracy beliefs and absolutist thinking in parental attitude toward COVID-19 vaccine, and the predictive role of parents'…

Extant literature suggests that adopted children can generate new attachment bonds with adoptive parents, although early adversity leaves an enduring mark. This research was focused on attachment representations when adoptees from Russia were reaching their adolescence. The participants were 29 adoptees and 38 children from a control group, aged…

Despite the fact that bullying has been consistently linked to moral disengagement among schoolchildren, research that distinguishes among the four loci of moral disengagement (cognitive restructuring, minimizing one's agentive role, distorting consequences, and victim attribution) to better understand bullying is scarce. The aim of this…

The primary aim of this study was to identify levels of fundamental movement skills (FMS) proficiency in primary school children. A secondary aim was to establish if these FMS proficiency levels differentiated between children born in different quartiles of the school year. The results demonstrated overall levels of FMS proficiency were low in…

Peer victimization is a common concern in adolescence that includes both relational (e.g., exclusion, rumor spreading) and overt (e.g., hitting, threatening) forms (Crick & Bigbee, 1998). Relational and overt peer victimization have shown to be differentially associated with depressive symptoms, with relational peer victimization showing a…

We investigated mental rotation in children by systematically varying the adult cube aggregate's set size, rotation angle, and picture/depth plane rotations in a new test. Eighty 4- to 11-year-old mainly middle-class children (British Indian and British African majority and white minority; 40 girls and 40 boys) were assessed using the new…

We evaluated whether maternal parenting strategies (maternal achievement-oriented control and maternal monitoring) and maternal teaching strategies are related to children's academic competence in middle childhood. We also assessed whether the relations of maternal parenting strategies with children's academic competence are mediated by maternal…

Incorporation of the vertical jump (VJ) test in health-related fitness batteries is predicated on the availability of prediction equations to accurately estimate VJ power. The purpose was to develop and validate a generalizable equation to estimate VJ power from VJ height, body mass, age, and sex in 10- to 18-year-olds. The sample (N = 529)…