Search results for "play"
showing 10 items of 706 documents
Free-to-play: About addicted Whales, at risk Dolphins and healthy Minnows. Monetarization design and Internet Gaming Disorder
2015
Abstract Introduction Video games are not only changing due to technical innovation, but also because of new game design and monetization approaches. Moreover, elite gamer groups with financial in-game-investments co-finance all users of free-to-play-games. Besides questions on youth protection, the growing popularity of free-to-play games has fostered discussions on supposed associations to Internet Gaming Disorder (IGD). Method Children and adolescents using free-to-play browser games were examined in a German school-based representative study (N = 3967; age range 12 to 18). Based on a clinical self-report AICA-S (Wolfling et al., 2011), students were categorized into non-problematic, ris…
Psychomotor reactions of aggressive and non-aggressive extrovert children.
1974
.— The subjects comprised two, matched, extremely aggressive (experimental ExG and control) groups of twelve 8–year-old boys, and one criterion group of extrovert, well-controlled boys. The ExG was submitted to a treatment of eight lesson? with the aim of making an individual realize non-aggressive, constructive ways of coping with situations. Video-tape recording was used. The results showed that (1) aggressively extrovert children were more impulsive and utilized more space than the constructively extrovert, (2) psychomotor characteristics were more stable over situations than aggressive and constructive coping strategies, and (3) no changes in the psychomotor characteristics of the ExG, …
The effects of reproduction on courtship, fertility and longevity within and between alternative male mating tactics of the horned beetle, Onthophagu…
2007
Life history theory provides a powerful tool to study an organism's biology within an evolutionary framework. The notion that males face a longevity cost of competing for and displaying to females lies at the core of sexual selection theory. Likewise, recent game theory models of the evolution of ejaculation strategies assume that males face a trade-off between expenditure on the ejaculate and expenditure on gaining additional matings. Males of the dung beetle Onthophagus binodis adopt alternative reproductive tactics in which major males fight for and help provision females, and minor males sneak copulations with females that are guarded by major males. Minor males are always subject to sp…
Is female-male mounting functional? An analysis of the temporal patterns of sexual behaviors in Japanese macaques
2019
Abstract In certain populations of Japanese macaques, adult females mount adult males in the context of heterosexual consortships (i.e., temporary but exclusive sexual associations between a male and a female). Previous research suggested that, in this primate species, female-male mounting (FMM) may be a behavioral adaptation. This functional hypothesis holds that FMM is a (special) courtship behaviour, or a (super) sexual solicitation, that serves the function of focusing the male's attention, preventing him from moving away, and expediting male-female mounting, in the context of high female competition for male mates. In this study, we aimed to test some of the proposed functional feature…
Adolescents' physical activity at recess and actions to promote a physically active school day in four Finnish schools
2014
The national Finnish Schools on the Move programme support schools with their individual plans to promote school-based physical activity (PA). We examined the changes in adolescents’ recess and overall PA in four lower secondary schools and described the school actions to promote students’ PA and the local contact persons’ perceptions of the effects. Recess and overall PA were assessed four times by anonymous questionnaires from students in grades 7–9 (n = 789) in 2010–12, and local contact persons (n = 7) provided information on school actions with diaries, interviews and surveys. Student data were analysed with descriptive statistics and chi-square tests, and school actions data were anal…
Results from Finland’s 2014 Report Card on Physical Activity for Children and Youth
2014
The Finnish 2014 Report Card on Physical Activity (PA) for Children and Youth is the first assessment of Finland’s efforts in promoting and facilitating PA opportunities for children and youth using the Active Healthy Kids Canada grading system. The Report Card relies primarily on research findings from 6 Research Institutes, coordinated by the University of Jyväskylä. The Research Work Group convened to evaluate the aggregated evidence and assign grades for each of the 9 PA indicators, following the Canadian Report Card protocol. Grades from A (highest) to F (lowest) varied in Finland as follows: 1) Overall physical activity—fulfillment of recommendations (D), 2) Organized sport participat…
The role of cuticular pheromones in courtship conditioning of Drosophila males
2005
1072-0502 (Print) Comparative Study Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S.; Courtship conditioning is an associative learning paradigm in Drosophila melanogaster, wherein male courtship behavior is modified by experience with unreceptive, previously mated females. While the training experience with mated females involves multiple sensory and behavioral interactions, we hypothesized that female cuticular hydrocarbons function as a specific chemosensory conditioned stimulus in this learning paradigm. The effects of training with mated females were determined in courtship tests with either wild-type virgin females as courtship targets, or with…
Reduction of Dopamine Level Enhances the Attractiveness of Male Drosophila to Other Males
2009
1932-6203 (Electronic); Dopamine is an important neuromodulator in animals and its roles in mammalian sexual behavior are extensively studied. Drosophila as a useful model system is widely used in many fields of biological studies. It has been reported that dopamine reduction can affect female receptivity in Drosophila and leave male-female courtship behavior unaffected. Here, we used genetic and pharmacological approaches to decrease the dopamine level in dopaminergic cells in Drosophila, and investigated the consequence of this manipulation on male homosexual courtship behavior. We find that reduction of dopamine level can induce Drosophila male-male courtship behavior, and that this beha…
Early communicative gestures and play as predictors of language development in children born with and without family risk for dyslexia
2014
The present study investigated early communicative gestures, play, and language skills in children born with family risk for dyslexia (FR) and a control group of children without this inheritable risk at ages 12, 15, 18, and 24 months. Participants were drawn from the Tromsø Longitudinal study of Dyslexia (TLD) which follows children's cognitive and language development from age 12 months through Grade 2 in order to identify early markers of developmental dyslexia. Results showed that symbolic play and parent reported play at age 12 months and communicative gestures at age 15 months explained 61% of the variance in productive language at 24 months in the FR group. These early nonlinguistic …
Drosophila female courtship and mating behaviors: sensory signals, genes, neural structures and evolution.
2010
International audience; Interest in Drosophila courtship behavior has a long-standing tradition, starting with the works by Sturtevant in 1915, and by Bastock and Manning in the 50s. The neural and genetic base of Drosophila melanogaster courtship behavior has made big strides in recent years, but the studies on males far outnumber those on females. Recent technical developments have made it possible to begin to unravel the biological substrates underlying the complexity of Drosophila female sexual behavior and its decisive effect on mating success. The present review focus more on the female side and summarizes the sensory signals that the male sends, using multiple channels, and which neu…