Increased age is associated with lower scores in many cognitive tests, but interpretation of those results is based on the assumption that the measurement at different ages is equivalent, such that the differences reflect quantitative rather than qualitative changes. The assumption of measurement equivalence was investigated by comparing adult age differences in the relations among alternative ...

The aim of the present study was to evaluate the applicability of the methods proposed by Nolla and Nicodemo for estimation of dental age and its correction with chronological age. Orthopantograms of 413 patients, aged 6-16 year (70-195 months) were selected to estimate the correlation between dental and chronological age. With both the Nolla and Nicodemo methods, the estimated age was lower th...

The effects of aging on alerting, orienting, and executive function were examined with the use of the Attention Network Task, which combines the Posner spatial cuing task and the Eriksen flanker task into a single procedure. We found that older adults showed significantly less alerting than young adults in response to a warning cue, although there were no age differences in orienting or executi...

1. THE CASE OF " BRAIN PLATINUM " It is widely believed that marketing can bring premium returns to an enterprise: therefore, people are likely to attribute a business success to its marketing strategies. However, the case of Brain Platinum is a puzzle to many as its advertisement has been considered to be vulgar by the public and lots of professionals in the advertising industry, and yet it is...

Older adults consistently report having fewer close and fewer problematic social ties than do younger adults. Yet, prior studies have not explicitly examined associations between the availability of living relatives and the nature of family ties in later life. One hundred sixty-four individuals ages 13 to 99 described their networks of close and problematic social ties. Then they provided infor...

the aim of this study was investigating some blood parameters of blue-neck male ostriches (struthio camelus) with 4 months old after feeding a diet containing 3% sunflower oil for two months. in the morning, after about 12 h of fasting, some blood samples were collected from the wing vein of ostriches at the beginning and 60 days of study in department of animal sceince arak university . the pl...

purpose: to evaluate the effect of age on stereopsis. methods: we evaluated stereoacuity using tno and titmus test after full correction of refractive errors in  87 randomly selected subjects aged 5-80 years. results: there was a significant relashionship between stereopsis and age such that stereoacuity increased with aging (anova, p<0.001). conculsion: stereopsis decreases with aging and ther...

The "little-league" is an important feature of the North American scene, young boys vying vigorously with one another for places on age-categorized icehockey, "football", and baseball teams that compete in municipal, regional and even provincial leagues. The system has been criticized on a number of counts, including the possible psychological risks of premature exposure to intensive competitio...

The last 10 years of research on adult hand preference patterns have generated a controversy over the meaning of the difference in the incidence rates of left- and right-hand preference in older adult samples (> 60 years old) when compared to samples of younger individuals (< 30 years old). Age differences in hand preference prevalence often are studied with large, cross-sectional age samples; ...