A New Procedure to Test Mediation With Missing Data Through Nonparametric Bootstrapping and Multiple Imputation

This article proposes a new procedure to test mediation with the presence of missing data by combining nonparametric bootstrapping with multiple imputation (MI). This procedure performs MI first and then bootstrapping for each imputed data set. The proposed procedure is more computationally efficient than the procedure that performs bootstrapping first and then MI for each bootstrap sample. The validity of the procedure is evaluated using a simulation study under different sample size, missing data mechanism, missing data proportion, and shape of distribution conditions. The result suggests that the proposed procedure performs comparably to the procedure that combines bootstrapping with full information maximum likelihood under most conditions. However, caution needs to be taken when using this procedure to handle missing not-at-random or nonnormal data.     

Empirical validation of a procedure to correct position and stimulus biases in matching-to-sample

The development of position and stimulus biases often occurs during initial training on matching-to-sample tasks. Furthermore, without intervention, these biases can be maintained via intermittent reinforcement provided by matching-to-sample contingencies. The present study evaluated the effectiveness of a correction procedure designed to eliminate both position and stimulus biases. Following key-peck training, a group of 6 pigeons had extended exposure to matching-to-sample contingencies without a correction procedure, a group of 4 pigeons was briefly exposed to a simultaneous matching-to-sample procedure to assess biases prior to exposure to the correction procedure, and a group of 5 pigeons was exposed directly to the correction procedure. The correction procedure arranged that every time an incorrect match was made, the trial configuration was repeated on the subsequent trial until a correct match was made. Extended exposure to matching-to-sample contingencies without a correction procedure was associated with reduced biases eventually for most subjects, but rapid development of near-perfect accuracy and bias-free performance was observed upon the implementation of the correction procedure regardless of the type of bias. Bias-free performance was maintained following subsequent exposure to a zero-delay MTS procedure.     

The consistency rule and the voice effect: the influence of expectations on procedural fairness judgements and performance

In procedural justice research it has frequently been found that allowing people an opportunity to voice their opinion enhances their judgements of the fairness of a decision-making procedure. The present study investigated how this voice effect is affected by the consistency over time rule, which dictates that, once people expect a certain procedure, deviation from the expected procedure will lead to a reduction in procedural fairness. Two experiments were conducted. In both experiments the independent variables manipulated were whether subjects were explicitly told to expect a voice procedure, were explicitly told to expect a no-voice procedure, or were told nothing about a subsequent procedure, and whether or not subjects subsequently received an opportunity to voice their opinion. The manipulations were induced by means of scenarios in Experiment 1, and by means of the Lind, Kanfer and Early (1990) paradigm in Experiment 2. In both experiments it was found that subjects who expected a voice procedure or who expected nothing judged receiving the voice procedure as more fair than receiving the no-voice procedure, but that subjects who expected a no-voice procedure judged receiving the voice procedure (inconsistency) as less fair than receiving the no-voice procedure (consistency). Furthermore, effects of the manipulated variables on subjects' task performance were found in Experiment 2.     

Using the teaching interaction procedure to train interventionists to implement the Cool versus Not CoolTM procedure

The teaching interaction procedure is a behavior analytic procedure that has been used to target the development of social skills. The teaching interaction procedure consists of labeling the target skill, providing a meaningful rationale, describing the steps of the target skill, modeling the skill, role‐play, and providing feedback throughout the interaction. Although the teaching interaction procedure has been used to teach a variety of social skills for individuals diagnosed with autism spectrum disorder (ASD), it has only been used to train staff in two studies. The purpose of this study was to evaluate the use of the teaching interaction procedure to teach three interventionists to implement the Cool versus Not Cool? procedure to target the development of social skills for children diagnosed with ASD. The results of a multiple baseline design demonstrated that the teaching interaction procedure was effective for all three interventionists. Results of the child participants' skill acquisition are also provided.     

MCMC estimation and some model-fit analysis of multidimensional IRT models

A Bayesian procedure to estimate the three-parameter normal ogive model and a generalization of the procedure to a model with multidimensional ability parameters are presented. The procedure is a generalization of a procedure by Albert (1992) for estimating the two-parameter normal ogive model. The procedure supports analyzing data from multiple populations and incomplete designs. It is shown that restrictions can be imposed on the factor matrix for testing specific hypotheses about the ability structure. The technique is illustrated using simulated and real data. The authors would like to thank Norman Verhelst for his valuable comments and ACT, CITO group and SweSAT for the use of their data.     

An improved Hochberg procedure for multiple tests of significance

We propose a simple modification of Hochberg's step‐up Bonferroni procedure for multiple tests of significance. The proposed procedure is always more powerful than Hochberg's procedure for more than two tests, and is more powerful than Hommel's procedure for three and four tests. A numerical analysis of the new procedure indicates that its Type I error is controlled under independence of the test statistics, at a level equal to or just below the nominal Type I error. Examination of various non‐null configurations of hypotheses shows that the modified procedure has a power advantage over Hochberg's procedure which increases in relationship to the number of false hypotheses.     

Minimization of a class of matrix trace functions by means of refined majorization

A procedure is described for minimizing a class of matrix trace functions. The procedure is a refinement of an earlier procedure for minimizing the class of matrix trace functions using majorization. It contains a recently proposed algorithm by Koschat and Swayne for weighted Procrustes rotation as a special case. A number of trial analyses demonstrate that the refined majorization procedure is more efficient than the earlier majorization-based procedure. The research of H. A. L. Kiers has been made possible by a fellowship from the Royal Netherlands Academy of Arts and Sciences.     

时间期待的认知与神经机制

时间期待是指个体利用环境中的时间信息预测目标刺激何时出现的能力。相关的认知模型可以分为两类：一类侧重于解释时间期待的形成过程, 如痕迹条件反射模型、双加工模型、动态注意模型、时间定向理论等; 另一类侧重于解释时间期待的更新过程, 如策略模型和时间再定位模型等。不同类型的时间期待激活的脑区不同, 表明时间期待的产生和更新过程存在分离：期待的产生激活与运动有关的左侧脑区, 而期待的更新激活与控制有关的右侧脑区。     

PATTERNS OF EXPERIENCE AND THE ACQUISITION OF CONCRETE TRANSITIVITY OF WEIGHT IN EIGHT-YEAR-OLD CHILDREN

The effects of empirical control vs. no empirical control, and of fixed vs. free procedure on the acquisition of transitivity of weight was studied. The fixed procedure involved practice on the sequence A > B, B > C, A > C, whereas the free procedure merely required the children to order triads of objects according to weight. Around thirty per cent of the subjects acquired transitivity, but none of the experimental variables had any effect. It is concluded that empirical control is unimportant. The lack of effect of free vs. fixed procedure is contrary to some earlier findings with younger children, who profited only from a free procedure.     

Testing the dorsal stream attention hypothesis: Electrophysiological correlates and the effects of ventral stream damage

The roles of dorsal and ventral processing streams in visual orienting and conscious perception were examined in two experiments. The first employed high density EEG with source localization. The second comprised a neuropsychological case study. Visual orienting was assessed with an attention procedure, where peripheral letters cued participants towards a target location. In the perception procedure participants responded to the same letters by performing an explicit conscious discrimination. In Experiment 1, the peripheral letters elicited rapid dorsal stream activation in the attention procedure, and this activation preceded top-down enhancement of target processing in occipital cortex. In the perception procedure early ventral stream activation was seen. In addition, peripheral letters elicited an “early directing attention negativity” (EDAN) over parietal recording sites in the attention procedure, but not in the perception procedure. In Experiment 2, a patient with a bilateral ventral stream lesion but preserved dorsal stream function showed clear disruption to performance in the perception procedure, whilst exhibiting a normal visual orienting effect in the attention procedure. Taken together these findings (1) highlight the distinct roles of the dorsal and ventral streams in attention and perception, and (2) suggest how these streams might interact, via reentrant effects of attention on perceptual processing.     

Maximizing the coefficient of generalizability under the constraint of limited resources

A procedure for maximizing the coefficient of generalizability under the constraint of limited resources is presented. The procedure uses optimization techniques that offer an investigator or test constructor the possibility of employing practical constraints. The procedure is illustrated for the two-facet random-model crossed design.     

Controlling item exposure and test overlap on the fly in computerized adaptive testing

This paper proposes an on‐line version of the Sympson and Hetter procedure with test overlap control (SHT) that can provide item exposure control at both the item and test levels on the fly without iterative simulations. The on‐line procedure is similar to the SHT procedure in that exposure parameters are used for simultaneous control of item exposure rates and test overlap rate. The exposure parameters for the on‐line procedure, however, are updated sequentially on the fly, rather than through iterative simulations conducted prior to operational computerized adaptive tests (CATs). Unlike the SHT procedure, the on‐line version can control item exposure rate and test overlap rate without time‐consuming iterative simulations even when item pools or examinee populations have been changed. Moreover, the on‐line procedure was found to perform better than the SHT procedure in controlling item exposure and test overlap for examinees who take tests earlier. Compared with two other on‐line alternatives, this proposed on‐line method provided the best all‐around test security control. Thus, it would be an efficient procedure for controlling item exposure and test overlap in CATs.     

RECREATING THE SCENE: AN EFFECTIVE WAY TO PROVIDE DELAYED PUNISHMENT FOR INAPPROPRIATE MOTOR BEHAVIOR

A mediated punishment procedure that involved recreating a behavioral sequence by guiding the subject through the behavior in the situation in which it occurred was used to suppress several severe problem behaviors in two developmentally delayed children. The mediational procedure was first used with a 4-year-old autistic boy for biting and then for foot stomping. Next the procedure was used for stealing and hoarding behavior with a multiply handicapped 17-year-old girl. Results indicated that the procedure was effective and produced relatively rapid results. One advantage of the procedure is that it provides an opportunity for trained personnel to apply restrictive procedures to low frequency behavior that occurs in their absence rather than relying on less qualified staff to implement the procedure immediately after the behavior occurs.     

A fast method for choosing the numbers of components in Tucker3 analysis

Recently, Timmerman and Kiers proposed an effective procedure for choosing the numbers of components in Tucker3 analysis, a kind of component analysis of three‐way data. The procedure, however, is rather time‐consuming, relying on very many complete Tucker3 analyses. Here, an alternative procedure is proposed, which basically relies on a single, quick analysis of the three‐way data set. In a simulation study it was found that the new procedure is comparable in its effect to the original procedure.     

REINFORCER ASSESSMENT FOR CHILDREN WITH DEVELOPMENTAL DISABILITIES AND VISUAL IMPAIRMENTS

We assessed the applicability of two previously developed reinforcer assessment procedures to children with developmental disabilities and visual impairments. Greater differentiation between stimuli was observed with a choice procedure than with a preference procedure. Measurement of compliance and rate of responding in adaptive skill training confirmed that the choice procedure accurately identified reinforcing stimuli. The preference procedure produced false positive predictions of reinforcer efficacy.     

Interpreting action as an answer

The aim of this paper is to introduce a logically grounded approach to action semantics and action interpretation. The main idea is to present the context of action as a set of questions demanding an action to answer. I introduce (a) a basic procedure of action interpretation, which is a reformulation of Hilpinen's semantical procedure for imperatives; (b) a procedure of what-interpretation; (c) a procedure of why-interpretation. The conditions of mutual reducibility of interpretation procedures are explicated. The paper concludes by putting forth the problem of interpretive bounds of moral responsibility.     

A modified procedure for parallel analysis of ordered categorical data

Parallel analysis has been well documented to be an effective and accurate method for determining the number of factors to retain in exploratory factor analysis. The O'Connor (2000) procedure for parallel analysis has many benefits and is widely applied, yet it has a few shortcomings in dealing with missing data and ordinal variables. To address these technical issues, we adapted and modified the O'Connor procedure to provide an alternative method that better approximates the ordinal data by factoring in the frequency distributions of the variables (e.g., the number of response categories and the frequency of each response category per variable). The theoretical and practical differences between the modified procedure and the O'Connor procedure are discussed. The SAS syntax for implementing this modified procedure is also provided.     

Can a Lineup Procedure Designed for Child Witnesses Work for Adults? Comparing Simultaneous,Sequential, and Elimination Lineup Procedures

A study (N = 165) was conducted to examine whether the elimination lineup, an identification procedure developed for children to reduce their false‐positive responding, was effective for adult witnesses. Although the sequential lineup is available to help reduce adults’ false‐positive identifications, having different procedures for child and adult witnesses poses difficulty for the police and justice system. One procedure for all witnesses would be ideal. Simultaneous, sequential, and elimination procedures were compared. The elimination procedure produced a comparable correct rejection rate to the sequential procedure. Both the elimination and sequential procedure produced a higher correct rejection rate than did the simultaneous procedure. Correct identification rates were comparable across the 3 lineup procedures.     

THEFT REVERSAL: AN OVERCORRECTION PROCEDURE FOR ELIMINATING STEALING BY RETARDED PERSONS1

To deal with the problem of stealing, an overcorrection procedure was designed in which the thief was required to give his victim an item identical to the stolen one in addition to returning the stolen item. This procedure was compared with the more commonly used simple correction procedure (restitution) in which the thief is required to return the stolen item. Under the simple correction procedure, an average of 20 thefts per day had been occurring among 34 retarded residents of an institution. The overcorrection procedure reduced the thefts by 50% on the first day, by 75% on the second day, and eliminated thefts by the fourth day, after which no further stealing occurred. The overcorrection procedure was a rapid and effective method of eliminating stealing, it provided special consideration for the victim, and it should be applicable to the nonretarded.     

Automated measure of conditioned orienting behavior in rats

The behavioral and neural mechanisms of orienting behavior have interested experimental psychologists for the last several decades. For example, in the framework of associative learning, examining the brain substrates of orienting behavior has yielded significant insight into the neural basis of attentional function and learning. The present study describes a procedure by which the orienting response to a visual stimulus (rearing on the hind legs) can be monitored automatically, and it validates the procedure by comparing data generated by the automated procedure with data generated by the typical observational procedure. The automated procedure provides an inexpensive means of obtaining immediate, online assessment of rearing behavior during a conditioning session, reduces the possibility of experimenter bias, and significantly reduces the time required to evaluate observational data.