多层次研究的数据聚合适当性检验:文献评价与关键问题试解

组织管理领域的多层次研究经常需要测量共享单位特性构念, 常用方法是将单位内若干个体成员的评分聚合到单位层次, 确保聚合后的分数具有充分代表性的统计前提是通过聚合适当性检验。聚合适当性检验的常用指标是组内一致性r_WG和组内信度ICC(1)、ICC(2), 但目前学界对于这两类指标何者更优、r_WG的原分布选择和数据清理、各指标的划界值等关键问题存在诸多争议。为此, 首先对国内9份管理学、心理学期刊2014年以来发表的166篇包含聚合适当性检验的论文进行内容分析, 并以Journal of Applied Psychology上的85篇论文为对比, 查明常规实践中的共性问题, 进而提出实践建议:(1)明确功能定位, 将r_WG作为聚合适当性指标, ICC(1)和ICC(2)分别作为效度、信度指标。(2)计算r_WG时审慎选择原分布, 排除组内一致性过低的组。(3)为各指标设定更加合理、有适度灵活性的划界值, 停止使用武断、粗糙的经验标准。最后, 强调研究者在模型构建和聚合决策中应加强理论考量, 避免片面依赖统计检验结果。     

The development of functional response units: the role of demarcating stimuli.

An experiment with rats examined the roles of demarcating stimuli and differential reinforcement probability on the development of functional response units. It examined the development of units in a probabilistic, free-operant situation in which the presence of demarcating stimuli was manipulated. In all conditions, behavior became organized into two-response sequences framed by changes in local reinforcement probability. A tone demarcating the beginning and end of contingent response sequences facilitated the development of functional response units, as in chunking, but the same units developed slowly in the absence of the tone. Complex functional response units developed even though reinforcement contigencies remained constant. These findings demonstrate that models of operant learning must include a mechanism for changing the response unit as a function of reinforcement history. Markov models may seem to be a natural technique for modeling response sequences because of their ability to predict individual responses as a function of reinforcement history; however, no class of Markov chain can incorporate changing response units in their predictions.     

语言认知加工过程中的早期皮层电位

在一项通过事件相关电位的N400考察双语者的语义表征的实验研究中,我们偶然发现两个早期成分与语言语义和形式认知加工相关。一个是在140毫秒左右达到峰顶的负波(N140),另一个是在190毫秒左右达到峰顶的正波(PJ90)。前者反映了被试对语义的初级分类与评价的神经认知过程;后者则反映了对语言形态的加工过程。     

Three predictions of the economic concept of unit price in a choice context

Economic theory makes three predictions about consumption and response output in a choice situation: (a) When plotted on logarithmic coordinates, total consumption (i.e., summed across concurrent sources of reinforcement) should be a positively decelerating function, and total response output should be a bitonic function of unit price increases; (b) total consumption and response output should be determined by the value of the unit price ratio, independent of its cost and benefit components; and (c) when a reinforcer is available at the same unit price across all sources of reinforcement, consumption should be equal between these sources. These predictions were assessed in human cigarette smokers who earned cigarette puffs in a two-choice situation at a range of unit prices. In some sessions, smokers chose between different amounts of puffs, both available at identical unit prices. Individual subjects' data supported the first two predictions but failed to support the third. Instead, at low unit prices, the relatively larger reinforcer (and larger response requirement) was preferred, whereas at high unit prices, the smaller reinforcer (and smaller response requirement) was preferred. An expansion of unit price is proposed in which handling costs and the discounted value of reinforcers available according to ratio schedules are incorporated.     

Similar consumption and responding across single and multiple sources of drug

Two experiments were conducted to assess whether total response output and total consumption would be similar when drugs are available from single and multiple sources of reinforcement, as predicted by behavioral economics. In Experiment 1, cigarette-deprived smokers were exposed to a concurrent-chains schedule in which equal fixed-ratio schedules served as the initial links, and different reinforcer magnitudes (i.e., number of cigarette puffs) were arranged across alternatives. After the session, obtained unit price was calculated and imposed in the next session when a different number of puffs was available according to a single fixed-ratio schedule. Thus, the unit price at which cigarette puffs could be earned was yoked within subjects across the single and concurrent-chains schedules. When plotted as a function of unit price, similar consumption and response rates were usually obtained across these schedules. Experiment 2 addressed a weakness of Experiment 1, namely, that responding was allocated exclusively to the larger reinforcer magnitude in concurrent-chains conditions, and therefore this schedule may have functioned as a single schedule. In Experiment 2, subjects were instructed to alternate responding between the two alternative schedules. Instructions produced approximately equal response allocation between the two alternatives. Again, similar consumption and response rates were observed across the single and instructed concurrent-chains schedules. These findings are discussed in the context of direct effects and behavioral economics perspectives of drug self-administration.     

中国卒中单元的模式探讨

卒中单元是针对急性卒中病人综合性治疗和康复的医疗单元,循证医学证据表明卒中单元是目前脑卒中治疗的最有效措施,建立有中国特色的卒中单元是我国目前脑血管病临床实践的当务之急。我们应该因地制宜,建立符合中国国情的卒中单元模式,卒中的早期康复治疗中应包括针灸疗法。     

正确认识和运用卒中单元的理念

过去几年,卒中单元已经成为脑卒中管理的重要的进展,日益得到重视和应用,但卒中单元强调的是以多维的观点、综合性方法,使卒中病人获得最优化的临床保健和健康后果,是脑血管疾病管理的新模式和新理念,其模式类型、运行方式、费用、具体应用等还有许多问题需要广泛、深入地探索,更研究证据和时间验证和回答。     

Psychological support for families of ICU patients: longitudinal documentation of the service

This study is the first systematic effort to investigate psychological services provided to relatives of ICU patients at Nicosia General Hospital. Documentation of psychological sessions provided to relatives of ICU patients for the years 2011–2014 was analyzed. To investigate possible differences in the total number of sessions for the referenced years, the records were analyzed using patients’ demographics, the outcome of hospitalization and the total number of sessions with relatives. A questionnaire was sent to the ICU staff aiming to identify their perception towards the need for psychological support. A total number of 863 psychological sessions were conducted with 640 relatives of 345 patients hospitalized in the ICU. Results indicate that more sessions are recorded when the outcome of younger patients’ condition worsens, whereas the number of sessions decreases for older patients’ families. When comparing the personnel’s beliefs, regarding the importance of providing psychological services to different age groups, significant difference was found suggesting that the older the patient the less sessions they believe are required indicating a possible ageism bias.     

Assessing the impact of autonomous motivation and psychological need satisfaction in explaining adherence to an exercise referral scheme*

Given the mixed findings concerning self-determination theory in explaining adherence to exercise referral schemes (ERS), the present study attempted to examine whether autonomous motivation and psychological need satisfaction could predict ERS adherence. Participants referred to an 8-week ERS completed self-report measures grounded in self-determination theory and basic needs theory at baseline (N = 124), mid-scheme (N = 58), and at the end of the scheme (N = 40). Logistic regressions were used to analyse the data. Autonomous motivation measured at mid-scheme explained between 12 and 16% of the variance in ERS adherence. Autonomy, relatedness and competence measured at mid-scheme explained between 18 and 26% of the variance in ERS adherence. This model also explained between 18 and 25% when measured at the end of the scheme. The study found limited evidence for the role of autonomous motivation in explaining ERS adherence. Stronger support was found for the satisfaction of the three needs for autonomy, relatedness and competence in predicting ERS adherence. Future research should tap into the satisfaction of all three needs collectively to help foster ERS adherence.