Properties of bootstrap tests for N‐of‐1 studies

N‐of‐1 study designs involve the collection and analysis of repeated measures data from an individual not using an intervention and using an intervention. This study explores the use of semi‐parametric and parametric bootstrap tests in the analysis of N‐of‐1 studies under a single time series framework in the presence of autocorrelation. When the Type I error rates of bootstrap tests are compared to Wald tests, our results show that the bootstrap tests have more desirable properties. We compare the results for normally distributed errors with those for contaminated normally distributed errors and find that, except when there is relatively large autocorrelation, there is little difference between the power of the parametric and semi‐parametric bootstrap tests. We also experiment with two intervention designs: ABAB and AB, and show the ABAB design has more power. The results provide guidelines for designing N‐of‐1 studies, in the sense of how many observations and how many intervention changes are needed to achieve a certain level of power and which test should be performed.     

Attentional orienting and executive control are affected by different types of meditation practice

Several studies have demonstrated the beneficial effects of meditation on attention. The present study investigated the relationship between focused attention (FA) and open monitoring (OM) meditation skills and the various functions of attention. In Experiment 1, we executed the attention network test and compared the performance of experts on dandao meditation with that of ordinary people on this test. The results indicated that the experts specializing in OM meditation demonstrated greater attentional orienting ability compared with those specializing in FA meditation and the control group. In addition, both expert groups registered improvements in their executive control abilities compared with the control group. In Experiment 2, we trained beginners in FA meditation for 3 months. The results showed that the experimental group exhibited significantly enhanced executive control ability. We infer that FA meditation skills promote executive control function and OM meditation skills promote both executive control and attentional orienting functions.     

Religiousness,religious coping methods,and cognitive test anxiety among African-American college students

This study explored the roles of religiousness and religious coping methods in predicting cognitive test anxiety. A convenience sample of 121 African-American students (97 females and 24 males) ranging in age from 18 to 39 (M_age?=?20.16), attending a historically Black university completed an online questionnaire assessing demographic information, religiousness, religious coping methods, and cognitive test anxiety. Results showed that negative religious coping methods were significant factors in predicting cognitive test anxiety. These relationships may be pertinent for understanding salient factors that influence cognitive test anxiety in African-American college students.     

An investigation of cognitive test performance across conditions of silence,background noise and music as a function of neuroticism

The present study investigates the role of trait neuroticism on cognitive performance under distraction. Seventy participants were given a personality test and then undertook a number of different cognitive tasks in silence, in the presence of popular music and in background noise. It was predicted that performance on a general intelligence test, a test of abstract reasoning, and a mental arithmetic task would be adversely affected by background sounds. It was predicted that neuroticism would be negatively correlated with performance on the mental arithmetic task but only when the individuals were working in the presence of background sound. Stable vs. unstable participant's performance on a mental arithmetic task during noise was significantly higher as predicted. The results provided partial support for the hypotheses and are discussed with respect to previous findings in the literature on personality (particularly introversion–extraversion) and distraction on cognitive task performance. Limitations are noted.     

TDQ-60 – a color picture-naming test for adults and elderly people: validation and normalization data

Word-finding difficulties are usually assessed with picture-naming tests. In this article, we present the TDQ-60, a new test designed to assess acquired lexical access deficits, taking into account semantics and psycholinguistic variables. The article includes three studies. Study 1 describes the development phase of the TDQ-60. In study 2, healthy control participants and individuals with a diagnosis of the semantic variant of primary progressive aphasia were assessed to establish the convergent and discriminant validity of the TDQ-60. Finally, in Study 3, a group of 305 young and elderly French-speaking adults from Quebec were assessed in order to provide normative data. The results demonstrate that the TDQ-60 has good convergent validity and good discriminant validity. This study also provides normative data in which were considered the effect of age and education.The TDQ-60 is a new valid picture-naming test, controlled for psycholinguistic variables and designed to identify the influence of semantics on lexical access in spoken production.     

Dissecting the expanded cognitive reflection test: an item response theory analysis

This study presents a psychometric evaluation of the Expanded Cognitive Reflection Test (CRT7) based on item response theory. The participants (N?=?1204) completed the CRT7 and provided self-reported information about their cognitive styles through the Preference for Intuition and Deliberation Scale (PID). A two-parameter logistic model was fitted to the data to obtain the item difficulty and discrimination parameters of the CRT7. The results showed that the items had good discriminatory power (αs?=?.80 ? 2.92), but the range of difficulty was restricted (βs ranged from ?.60 to .32). Moreover, the CRT7 showed a pattern of correlations with the PID which was similar to that of the original CRT. When taken together, these results are evidence of the adequacy of the CRT7 as an expanded tool for measuring cognitive reflection; however, one of the newer items (the pig item) was consistently problematic across analyses, and so it is recommended that in future studies it should be removed from the CRT7.     

中国人格量表编制的本土化研究

为了深入探究中国人人格特质与结构,并编制本土化人格量表; 本文综合QZPS、CPAI-2及CPFFI的因素命名特征,编制出包含116个项目的人格词汇评定表。通过对1455名被试人格词汇评定结果的探索性分析,最终确定7个维度的人格词汇评定量表。该该量表7个因素对总变异的贡献率为51.63%,内部一致性信度在0.663-0.912之间,总量表的内部一致性信度为0.800; 7个因素的重测信度在0.700～0.874(p<0.001)之间。研究结果显示情绪性与外向性两个人格特质是人们共有的人格特质内容,该人格量表中的其他人格因素既有与西方人格因素趋同的方面,也有中国文化背景下本土化内容。同QZPS、CPAI-2及CPFFI相比,该人格因素结构几乎可以包含以上3个模型的绝大多数人格因素内容,且结构清晰全面。     

Effects of blood alcohol testing programmes on drinking behaviour among driving crash patients in emergency departments: A cluster quasi-experimental study

This study aimed to evaluate the effectiveness of blood alcohol testing in decreasing the prevalence of current one-month drinkers among road traffic crash patients within emergency departments at one, two, and three months after a crash. A cluster quasi-experimental study was conducted on 600 crash patients who visited one of the emergency departments at 21 hospitals in Udon Thani province, Thailand. The hospitals were categorised into a (i) high-adherence hospital group (≥70% of all patients) and (ii) low-adherence hospital group (<70% of all patients) according to the compliance of blood alcohol testing in their emergency departments. The data were collected by a trained nurse using a structured questionnaire. The primary outcome was the prevalence of one-month current drinkers. We included 600 patients: 291 from six hospitals in the high-adherence group and 309 from 15 hospitals in the low-adherence group. The prevalence of one-month current drinkers significantly decreased in both the high-adherence and low-adherence groups. However, the prevalence of current drinkers at two and three months after a crash was not statistically significant compared to that one month prior to a crash (48.0% to 19.3% and 31.7% to 13.8% in the high- and low-adherence hospital groups, respectively; p < 0.05 from McNemar’s test). The effectiveness of blood alcohol testing in decreasing the prevalence of one-month current drinkers among traffic crash patients within emergency departments was observed to be statistically significant only at one month after a crash, and not at two and three months.