The effect of badminton-specific exercise on badminton short-serve performance in competition and practice climates     

Michael J. Duncan  Cheryl K.Y. Chan  Neil D. Clarke  Martin Cox  Mike Smith 《European Journal of Sport Science》2017,17(2):119-126

This study examined the effects of changes in physiological and psychological arousal on badminton short-serve performance in competitive and practice climates. Twenty competitive badminton players (10 males and 10 females) volunteered to participate in the study following ethics approval. After familiarisation, badminton short-serve performance was measured at rest, mid-way through and at the end of a badminton-specific exercise protocol in two conditions; competition vs. practice. Ratings of cognitive and somatic anxiety were assessed at three time points prior to badminton short-serve performance using the Mental Readiness Form 3. Heart rate and rating of perceived exertion (RPE) were assessed during the exercise protocol. Results indicated that better short-serve performance was evident in practice compared to competition (P?=?.034). RPE values were significantly higher in the competition condition compared to practice (P?=?.007). Cognitive anxiety intensity was significantly lower post-exercise in the practice condition compared to competition (P?=?.001). Cognitive anxiety direction showed greater debilitation post-exercise in the competition condition compared to practice (P?=?.01). Somatic anxiety intensity increased from pre-, to mid- to post-exercise (P?=?.001) irrespective of condition. This study suggests that badminton serve performance is negatively affected when physiological arousal, via badminton-specific exercise, and cognitive anxiety, via perceived competition, are high.  相似文献   

Purchasing power parity and cultural convergence: evidence from the global video games market     

Joe Cox 《Journal of Cultural Economics》2008,32(3):201-214

A shared activity or pursuit can have the effect of bringing about cultural convergence in the form of patterns of behaviour and consumption. This idea is supported by the Axelrod (1997) thesis, which suggests that cultures are more likely to interact and subsequently converge if they have shared traits: one of these being the use of technology. This paper seeks to apply such a cultural perspective to the body of published literature on deviations from the law of one price. Adopting a similar methodology to the popular ‘Big Mac’ index, disparity between official market exchange rate and the real rate of exchange between two currencies is measured using local prices of video game consoles. The results of the study suggest that, while a degree of pricing and cultural convergence across broad geographic areas is observed, many major global currencies are trading at levels that are quite significantly different to that which is suggested by purchasing power parity (PPP) theory.

Joe CoxEmail:

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Infant-directed speech does not always involve exaggerated vowel distinctions: Evidence from Danish     

Christopher Cox  Christina Dideriksen  Tamar Keren-Portnoy  Andreas Roepstorff  Morten H. Christiansen  Riccardo Fusaroli 《Child development》2023,94(6):1672-1696

This study compared the acoustic properties of 26 (100% female, 100% monolingual) Danish caregivers' spontaneous speech addressed to their 11- to 24-month-old infants (infant-directed speech, IDS) and an adult experimenter (adult-directed speech, ADS). The data were collected between 2016 and 2018 in Aarhus, Denmark. Prosodic properties of Danish IDS conformed to cross-linguistic patterns, with a higher pitch, greater pitch variability, and slower articulation rate than ADS. However, an acoustic analysis of vocalic properties revealed that Danish IDS had a reduced or similar vowel space, higher within-vowel variability, raised formants, and lower degree of vowel discriminability compared to ADS. None of the measures, except articulation rate, showed age-related differences. These results push for future research to conduct theory-driven comparisons across languages with distinct phonological systems.  相似文献