Stewart调查了1299个因患癌而死亡的儿童，另调查了1299个同年出生但没患癌的儿童作为对照，用来研究胚胎期暴露于X线的儿童患癌的危险性。两组儿童的母亲在怀孕期间是否用X线照射腹部的情况以及x2检验结果如下： 儿童患癌与其母亲孕期照射X线的关系 卡方检验结果显示x2＝29.8，P＜0.001。 请您计算OR值，并简要地...
关于电脑游戏的神经学和心理学影响，总是存在很多争论。最近的研究表明，电脑游戏能够改善人类的认知功能。研究人员们发现，玩3D类电脑游戏的人在游戏之后大脑海马体中灰质变多了，海马体中的灰质对于中枢神经系统至关重要，而且只存在于海马体中，它负责将短期记忆转化为长期记忆和空间定位。 以下哪项如果为真，最能...
Others prefer to measure the QT intervals that follow the shortest and longest R-R intervals and divide each by the square root of the R-R interval preceding it. The average of these intervals would then be used as the adjusted QT interval (Figure 1, B). Measurement of the QT interval ...
Perceptions of system competence and communicative ability, termed partner models, play a signifcant role in speech interface interaction. Yet we do not know what the coredimensionsof this concept are. Taking a psycholexical approach, our paper is the frst to identify the key dimensions that defn...
using modeling of the chromatic contrast between fish pattern and background under flickering illumination, we found that the spectral sensitivity of cones in a cichlid focal species is optimally tuned to maximize the visual contrast between fish pattern and background, instead of to produce a flicke...
In order for me to see the status of the infection I will need a new set of logs to start with. Please print out or make a copy in notpad of any instructions given, as sometimes it is necessary to go offline and you will lose access to them. ...
“The power of population is so superior to the power of the earth to produce subsistence for man that premature death must in some shape or other visit the human race. The vices of mankind are active and able ministers of depopulation. They are the precursors in the great army of destruct...
Furthermore, we assessed discriminant validity using two approaches. First, we compared the square root of AVE with the correlation between latent variables. This approach is often called the Fornell–Larcker criterion. In Table5, the diagonal line shows the square root of AVE greater than the co...
Others prefer to measure the QT intervals that follow the shortest and longest R-R intervals and divide each by the square root of the R-R interval preceding it. The average of these intervals would then be used as the adjusted QT interval (Figure 1, B). Measurement of the QT interval ...
It was calculated by taking the chi-square value, dividing it by the sample size, and then taking the square root of this value. The Phi coefficient can be interpreted as very strong, strong, moderate, and weak for phi values of 0.25, 0.15, 0.10, and 0.05, respectively [57]. From ...