An evaluation of time-sample measures of behavior

Continuous and time-sample measures of the in-seat behavior of a secretary were obtained. Measurement error, i.e., the extent to which the sample measures deviated from the continuous measure, was a function of the frequency of the sample measurements and the criterion used to score an example of the behavior. If the behavior had to be exhibited throughout the observational interval (whole-interval time sampling), there was a consistent underestimate of the continuous measure. If the behavior had to be exhibited only briefly within the observational interval (partial-interval time sampling), there was a consistent overestimate of the continuous measure. And, if the behavior had to be exhibited at the end of the observational interval (momentary time sampling), overestimations and underestimations of the continuous measure occurred about equally often. As expected, the more frequently the sample measures were made the closer was the agreement between the sample and continuous measures. Two conclusions concerning measurement error in interval time sampling were made. The first was that the error will be a function of the mean time per response. The second is that this error will not be consistent across experimental conditions.     

Correcting the oral reading errors of a beginning reader

Correcting student errors is an important educational concern for teachers. In this study, an alternating treatments design was used to compare the effectiveness of four methods for correcting oral reading errors, including immediate word supply, delayed word supply, sound out (phonics analysis), and directed rehearsal techniques. The subject was a 6-year-old beginning reader with average ability. Results showed that the directed rehearsal procedure was the most effective method. This study demonstrated that teachers can use rigorous research methods in their own classrooms to determine which teaching strategies they should use with their students.     

Guidelines for flash card instruction

Flash card drills provide students with a means to memorize information such as sight words, math facts, state capitols, foreign language vocabulary, and equations. Because of the utility of flash cards in educational practice, information on behavioral strategies to increase the effectiveness of their use may be especially valuable to teachers. This article provides guidelines for flash card instruction based on current research. These guidelines are to: a) intersperse known items, b) minimize errors, c) use feedback for correct and error responses, and d) select an instructional arrangement (e.g., group format) that will enhance responding. Future research may refine these guidelines to improve teaching effectiveness.     

儿童运动行距预测能力的发展及影响因素

采用计算机软件控制实验,以三种不同运动速度、四种不同运动行距组合呈现的光点运动为刺激物,每次光点在暴露运动一段行程后进入遮蔽,要求儿童判断光点到达目标位置时按键反应。主要结果表明：（１）儿童运动行距预测能力的发展表现为５─８岁和１２─１９岁两个加速期及８─１２岁一个过渡期的发展模式。但在过渡期内,儿童的预测误差偏向有显著变化;（２）客体运动速度对儿童运动行距预测操作精度有显著影响,慢速下精度较高;（３）客体运动行距、被试性别并不影响儿童的行距预测操作;（４）５岁、１２岁与１９岁儿童多倾向于超前反应。     

Good to the last drop? Millikan stories as “canned” pedagogy

In recent literature, the famous Millikan oil-drop experiment appears as a case of “good scientific judgment” on the one hand, and scientific misconduct on the other. This article discusses different interpretations of the fact that Nobel laureate Robert Millikan’s notebooks show that he eliminated a number of oildrops in his published 1913 paper on the charge of the electron, while reporting that he had included all the drops. Starting with the common source of all Millikan stories, historian of physics Gerald Holton’s 1978 paper, I discuss recent “canned” versions of Millikan-as-misbehaver in books on scientific fraud. Then I examine some versions of Millikan-as-good-scientist, particularly the reconstruction by historian of physics Allan Franklin, and the views of some practicing physicists. Finally, we have an instructive head-on collision between the two standard treatments of Millikan. The problem with canned stories is not only insufficient information; we also lack a realistic evaluation of the role of ethics in science. As a fundamentally knowledge-seeking enterprise, science may harbor an inherent, perhaps irresolvable, conflict between scientific and ethical concerns. The author’s special interests include standards for “good science”, science and values, and social psychology.     

The uniqueness of software errors and their impact on global policy

The types of errors that emerge in the development and maintenance of software are essentially different from the types of errors that emerge in the development and maintenance of engineered hardware products. There is a set of standard responses to actual and potential hardware errors, including: engineering ethics codes, engineering practices, corporate policies and laws. The essential characteristics of software errors require new ethical, policy, and legal approaches to the development of software in the global arena. An earlier version of this paper was presented at the Engineering Foundation Conference on “Ethics for Science and Engineering Based International Industries” Durham, NC, USA. September 1997.     

EFFECTS OF IMMEDIATE AND DELAYED ERROR CORRECTION ON THE ACQUISITION AND MAINTENANCE OF SIGHT WORDS BY STUDENTS WITH DEVELOPMENTAL DISABILITIES

We compared immediate and delayed error correction during sight-word instruction with 5 students with developmental disabilities. Whole-word error correction immediately followed each error for words in the immediate condition. In the delayed condition, whole-word error correction was provided at the end of each session's three practice rounds. Immediate error correction was superior on each of the four dependent variables.     

预期错误与急性应激对不同强度恐惧记忆提取消退的影响

在条件性恐惧记忆再巩固模型下, 预期错误被证明是引发记忆不稳定的必要条件, 但其在不同强度恐惧记忆下的作用尚不明确。对于高强度可能导致的提取无效, 缺乏相应的探索以寻找解决办法, 而应激(stress)在其中发挥的作用值得探索。本研究考察人类被试中, 预期错误在不同强度恐惧记忆下的作用, 以及提取之后施加外源性应激对于消退进程的影响。结果发现, 对于较弱的恐惧记忆, 单个预期错误提取后消退可显著抑制恐惧自发恢复; 而对于较强恐惧记忆, 单个预期错误不能提取恐惧记忆进入再巩固, 已消退的记忆还会复发; 且在该种情况下, 如果在提取后施加外源性急性应激, 会进一步增大恐惧恢复。     

Measurement bias and error correction in a two-stage estimation for multilevel IRT models

Among current state-of-the-art estimation methods for multilevel IRT models, the two-stage divide-and-conquer strategy has practical advantages, such as clearer definition of factors, convenience for secondary data analysis, convenience for model calibration and fit evaluation, and avoidance of improper solutions. However, various studies have shown that, under the two-stage framework, ignoring measurement error in the dependent variable in stage II leads to incorrect statistical inferences. To this end, we proposed a novel method to correct both measurement bias and measurement error of latent trait estimates from stage I in the stage II estimation. In this paper, the HO-IRT model is considered as the measurement model, and a linear mixed effects model on overall (i.e., higher-order) abilities is considered as the structural model. The performance of the proposed correction method is illustrated and compared via a simulation study and a real data example using the National Educational Longitudinal Survey data (NELS 88). Results indicate that structural parameters can be recovered better after correcting measurement biases and errors.     

Vécu des situations à risque d’erreur en réanimation : une étude qualitative auprès des médecins et infirmiers

Intensive care units are considered as services with a high risk of error. More and more studies have measured the incidence and impact of errors in intensive care units, but few of them are centered on the impact of the risk of error for professionals. This study focuses on the perception of the risk of error, how it is experienced, and the way in which professionals cope with it. Forty professionals (20 physicians, 20 nurses) participated in clinical interviews. We transcribed recordings and analysed the data using a phenomenological approach. The risk of error is omnipresent in intensive care units. For nurses with less than one years experience, the risk of error is associated with important manifestations of anxiety. On the contrary, for doctors and nurses who have worked for more than one year in ICU, their experience and the relationship of cooperation built with colleagues gives them a feeling of control over risky situations. Our results show that it is important to take into account the risk of error in order to better target the support and training for the ICU professionals.