Regional spreading of paleo-gravel formations in north-western Croatia and their geomorphological importance for explantion of morphogenesis and neotectonical movements

U ovom se članku obrađuje regionalna distribucija kvartarnih šljunčanih naslaga u dijelu sjeverozapadne Hrvatske, kao i njihovovo geomorfološko značenje u tumačenju morfogeneze reljefa i kvartarnih neotektonskih pokreta.Regionally distributed Quaternary fluvial gravel layers in North-western Croatia, which were by neotectonic movements subsequently removed at different hypsometrical levels, are discussed in the paper

Učinkovitost u zadacima fine motorike i prostornih odnosa tijekom menstrualnog ciklusa

Various studies have shown fl uctuations in task performance during the menstrual cycle. The aim of this study was to see the effects of the menstrual cycle on performing fi ne motor and spatial tasks of different level of complexity in twenty students aged 18 to 21 years, with regular menstrual cycle (28 to 30 days). The students performed O’Connor Finger Dexterity Test and mental rotation test during the menstrual, late follicular, and midluteal phase. Before the tests were performed, we administered Spielberger’s State-Trait Anxiety Inventory for each phase. After the tasks were completed, the subjects ranked their diffi culty on Borg’s scale. The results showed the best performance in both tests in the midluteal phase (with sex hormones at their peak). The anxiety level and task diffi culty ranking were the highest in the menstrual phase, when the hormone levels were the lowest.Različita su istraživanja pokazala promjene učinkovitosti tijekom menstrualnog ciklusa. U zadacima u kojima su uspješnije žene, najveća učinkovitost događa se tijekom kasne folikularne ili srednje lutealne faze. U zadacima u kojima su pak uspješniji muškarci najveća je učinkovitost nađena u menstrualnoj fazi. Na osnovi uporabe zadataka fi ne motorike i prostornih zadataka različitih razina kompleksnosti, cilj ovog istraživanja bio je ispitati utjecaj menstrualnog ciklusa na kognitivne funkcije. U istraživanju je sudjelovalo dvadeset ispitanica, dobi od 18 do 21 godinu, s redovitim menstrualnim ciklusima (28 do 30 dana). Ispitanice su izvodile O’Connorov deksterimetar i zadatke mentalne rotacije tijekom menstrualne, kasne folikularne i srednje lutealne faze. Prije izvođenja zadataka, u svakoj fazi ciklusa primijenjen je Spielbergerov upitnik stanja anksioznosti. Nakon izvođenja zadataka, ispitanice su procjenjivale njihovu težinu na Borgovoj skali. Rezultati su pokazali najbolju učinkovitost u oba zadatka u fazi visokih razina spolnih hormona (srednja lutealna faza). Stanje anksioznosti i procijenjene težine zadataka bili su najviši u menstrualnoj fazi, kada su razine spolnih hormona najniže

Reasons for facebook usage: data from 46 countries

info:eu-repo/semantics/publishedVersio

Predictors of enhancing human physical attractiveness: Data from 93 countries

People across the world and throughout history have gone to great lengths to enhance their physical appearance. Evolutionary psychologists and ethologists have largely attempted to explain this phenomenon via mating preferences and strategies. Here, we test one of the most popular evolutionary hypotheses for beauty-enhancing behaviors, drawn from mating market and parasite stress perspectives, in a large cross-cultural sample. We also test hypotheses drawn from other influential and non-mutually exclusive theoretical frameworks, from biosocial role theory to a cultural media perspective. Survey data from 93,158 human participants across 93 countries provide evidence that behaviors such as applying makeup or using other cosmetics, hair grooming, clothing style, caring for body hygiene, and exercising or following a specific diet for the specific purpose of improving ones physical attractiveness, are universal. Indeed, 99% of participants reported spending >10 min a day performing beauty-enhancing behaviors. The results largely support evolutionary hypotheses: more time was spent enhancing beauty by women (almost 4 h a day, on average) than by men (3.6 h a day), by the youngest participants (and contrary to predictions, also the oldest), by those with a relatively more severe history of infectious diseases, and by participants currently dating compared to those in established relationships. The strongest predictor of attractiveness-enhancing behaviors was social media usage. Other predictors, in order of effect size, included adhering to traditional gender roles, residing in countries with less gender equality, considering oneself as highly attractive or, conversely, highly unattractive, TV watching time, higher socioeconomic status, right-wing political beliefs, a lower level of education, and personal individualistic attitudes. This study provides novel insight into universal beauty-enhancing behaviors by unifying evolutionary theory with several other complementary perspectives

Sex Hormones and Cognitive Functioning of Women

U radu se raspravlja o organizirajućim i aktivirajućim učincima spolnih hormona te o njihovu utjecaju na kognitivno funkcioniranje. Dosadašnja su istraživanja pokazala spolne razlike u nekim specifičnim kognitivnim sposobnostima. Žene su u prosjeku bolje u verbalnoj fl uentnosti, perceptivnoj brzini i točnosti, kao i finijoj motorici, dok su muškarci u prosjeku bolji u prostornim i matematičkim sposobnostima. Ove razlike u kognitivnom funkcioniranju dovode se u vezu s izlaganjem mozga fetusa različitim razinama spolnih hormona tijekom prenatalnog života. Studije na skupinama rođenim s genskim poremećajima, kao što su sindrom neosjetljivosti na androgene, kongenitalna adrenalna hiperplazija i Turnerov sindrom također upućuju na organizirajuće učinke spolnih hormona na kognitivno funkcioniranje. Nadalje, dosadašnja istraživanja pokazuju da povišene razine ženskih spolnih hormona u kasnoj folikularnoj i/ili lutealnoj fazi menstrualnog ciklusa potenciraju tipičan ženski kognitivni obrazac funkcioniranja, koji karakterizira veća učinkovitost u zadacima koje u prosjeku bolje rješavaju žene. Niske pak razine ovih hormona, koje karakteriziraju menstrualnu fazu ciklusa, potenciraju tipičan muški obrazac funkcioniranja, koji uključuje bolju učinkovitost u zadacima koje u prosjeku bolje rješavaju muškarci. U radu se također raspravlja o metodološkim razlikama u dosadašnjim istraživanjima organizirajućih i aktivirajućih učinaka spolnih hormona na kognitivno funkcioniranje, kao i o smjernicama za buduća istraživanja.This paper discusses the organisational and activational effects of sex hormones, and their infl uence on cognitive functioning. Previous studies have shown gender differences in specifi c cognitive abilities. Women generally show an advantage in verbal fl uency, perceptual speed and accuracy, as well as in fi ne motor skills, while men generally show an advantage in spatial and mathematical abilities. These differences in cognitive functioning are thought to occur as a result of foetal brain exposure to different levels of sex hormones during prenatal life. Additional evidence of organisational effects of sex hormones on cognitive functioning also comes from studies of subjects with genetic disorders, such as androgen insensitivity syndrome, congenital adrenal hyperplasia, and Tyrner syndrome. Furthermore, former investigations have shown that increase in female sex hormone in the late follicular and/or luteal phase of the menstrual cycle intensifi es the typical female cognitive pattern of functioning with improved effi ciency in tasks which are usually better performed by women. At the same time, low levels of such hormones that characterise the menstrual phase of the cycle intensify the typical male cognitive pattern of functioning with better effi ciency in tasks which usually better performed by men. This paper also points to methodological differences between investigations of organizational and activational effects of sex hormones on cognitive functioning, as well a to the direction of future investigations

Predictors of Enhancing Human Physical Attractiveness: Data from 93 Countries

People across the world and throughout history have gone to great lengths to enhance their physical appearance. Evolutionary psychologists and ethologists have largely attempted to explain this phenomenon via mating preferences and strategies. Here, we test one of the most popular evolutionary hypotheses for beauty-enhancing behaviors, drawn from mating market and parasite stress perspectives, in a large cross-cultural sample. We also test hypotheses drawn from other influential and non-mutually exclusive theoretical frameworks, from biosocial role theory to a cultural media perspective. Survey data from 93,158 human participants across 93 countries provide evidence that behaviors such as applying makeup or using other cosmetics, hair grooming, clothing style, caring for body hygiene, and exercising or following a specific diet for the specific purpose of improving ones physical attractiveness, are universal. Indeed, 99% of participants reported spending \u3e10 min a day performing beauty-enhancing behaviors. The results largely support evolutionary hypotheses: more time was spent enhancing beauty by women (almost 4 h a day, on average) than by men (3.6 h a day), by the youngest participants (and contrary to predictions, also the oldest), by those with a relatively more severe history of infectious diseases, and by participants currently dating compared to those in established relationships. The strongest predictor of attractiveness-enhancing behaviors was social media usage. Other predictors, in order of effect size, included adhering to traditional gender roles, residing in countries with less gender equality, considering oneself as highly attractive or, conversely, highly unattractive, TV watching time, higher socioeconomic status, right-wing political beliefs, a lower level of education, and personal individualistic attitudes. This study provides novel insight into universal beauty-enhancing behaviors by unifying evolutionary theory with several other complementary perspectives