C. The time of day the experiment is conducted. D. The age of the participants. 相关知识点: 试题来源: 解析 C。混杂变量是可能影响实验结果的额外变量。在音乐对情绪影响的实验中,实验进行的时间可能会影响参与者的情绪,从而成为混杂变量。选项 A 音乐音量可以作为独立变量控制。选项 B 音乐类型也可以...
doi:http://dx.doi.org/10.1136/bmj.317.7164.985thrombotic thrombocytopenic purpura splenectomycase reportPresents information on a study which hypothesized that patients who discharge themselves from emergency departments before completing initial management of their condition have a significant increased rate ...
2000. "Impact of a Confounding Variable on the Inference of a Regression Coefficient." Sociological Methods and Research 29(2):147-94.Frank, Kenneth A. 2000. "Impact of a Confounding Vari- able on the Inference of a Regression Coefficient." Sociological Methods and Research 29(2):147-94....
Trait anxiety as a confounding variable in test anxiety research : a thesis presented to the faculty of the Graduate School of Millersville University of Pennsylvania, in partial fulfillment of the requirements for the degree of Master of Science ...
Random Forests are a powerful and frequently applied Machine Learning tool. The permutation variable importance (VIMP) has been proposed to improve the explainability of such a pure prediction model. It describes the expected increase in prediction error after randomly permuting a variable and disturbin...
despite precautions we took to minimize this possibility as discussed in Methods. The effects of anti-epileptic medications are another confounding variable that could have influenced the magnitude of the results, though subjects ceased their medications during clinical investigation. At this time, the ...
Psychologist Nina Strohminger at the University of Pennsylvania , who was not involved in the study , says she wants the effect to be cannot rule out some unknown confounding variable . And if real ,she notes . it might be reversible by another nudge:" Easy come , easy go Schwitzgebel ...
research has yet to examine the influence of mindfulness on anxiety in the elderly relative to a control group that isolates the effects of diaphragmatic breathing (a potential confounding variable). For this reason, it is critical to isolate and examine the unique attentional component of mindfulnes...
(E% value), an ANOVA is performed with the E% score as the dependent variable and the condition (with or without smartphone) as the independent variable (F(1,40) = 2.088,p = 0.156, η2 = 0.050). The result of this ANOVA is not significant, meaning that the subjects ...
The development stage involves assessment of both the diagnostic and technical use of the process to ensure that the measurements obtained are relevant to the diagnostic question(s) and that the analyte(s) can be unambiguously identified (ie, that there are no confounding factors). The final ...