Effects of White Noise on Off-Task Behavior and Sleep for Elementary-Age Students with ADHD

Abstract

Children with ADHD were administered 75?dB of continuous white noise during independent seat work in the classroom and during bedtime in their homes. Compared to baseline all three students exhibited decreases in off-task behavior. Off-task behavior returned to original baseline levels when white noise was removed and decreased again when reintroduced in classrooms. White noise also decreased bedtime sleep latency and spontaneous night wakings at home. Both sleep latencies and night wakings increased during return-to-baseline conditions. Surprisingly, when white noise was reintroduced only in the classrooms sleep improved a second time. White noise in classrooms with or without simultaneous treatment during sleep at night resulted in lower levels of off-task classroom behavior as well as less disruptive sleep. Results were independent of whether children were on ADHD medication. Children, teachers, and parents all rated white noise favorably.     

Effects of three types of noncontingent auditory stimulation on vocal stereotypy in children with autism

We evaluated the effects of 3 types of noncontingent auditory stimulation (music, white noise, recordings of vocal stereotypy) on 2 children with autism who engaged in high rates of vocal stereotypy. For both participants, the music condition was the most effective in decreasing vocal stereotypy to near-zero levels, resulted in the highest parent social validity ratings, and was selected as most preferred in treatment preference evaluations.     

Revisiting the Obama Effect: Exposure to Obama reduces implicit prejudice

The present research experimentally evaluated whether exposure to Barack Obama, a positive counter-stereotypic exemplar, can result in a decrease in implicit anti-Black prejudice among non-Black participants. In order to undo any existing influence of exposure to Obama, we first exposed some participants to negative Black exemplars. Participants were assigned to one of three conditions where they were exposed subtly to negative Black exemplars, to negative Black exemplars and then Obama, or to neutral X's (i.e., control). Participants who were only primed with negative Black exemplars showed more implicit negativity toward Black people compared to the control group. Participants exposed to the same negative Black exemplars and then Obama showed a decrease in implicit racial bias levels compared to those in the negative exemplar only condition, providing experimental evidence that exposure to Obama can decrease implicit racial bias levels. These findings indicate that even subtle exposure to a positive, counter-stereotypic exemplar can reduce implicit prejudice.     

Peer pressure against prejudice: A high school field experiment examining social network change

Individuals often conform to the intergroup attitudes and behaviors modeled by their peers in a given situation. To what extent does peer influence on intergroup prejudice 1) diffuse across a social network of peers and 2) affect attitudes and behavior across time? Student leaders (“Peer Trainers”) were trained to confront expressions of intergroup prejudice in five randomly assigned high schools across a period of five months; students recruited to be Peer Trainers in five control schools waited to be trained. Independent surveys of Peer Trainers' social networks reveal that treatment Peer Trainers were significantly more likely than control Trainers to be nominated by peers as students who confront prejudice. Treatment Peer Trainers' tolerant behavior spread to close friends and to acquaintances in their social network; their attitudes spread inconsistently, and only to close friends. Studying peer influence within social networks can improve understanding of social influence, prejudice reduction, and social change.     

Investigating the effectiveness of perceptual treatments on a crest vertical curve: A driving simulator study

Rural roads are characterized by a high percentage of run-off-the-road accidents and head-on collisions, mainly caused by inappropriate speeds and failure to maintain a proper lateral position along the roadway alignment. Among several road safety treatments, low-cost perceptual measures are considered an effective tool, as they generally increase the risk perceived by drivers, or even alter the drivers’ speed perception, and consequently tempting them to decrease their speeds. Their effectiveness has been widely recognized in a number of studies, especially with respect to road intersections and curves.The overall aim of this study is to investigate the effects of different perceptual treatments on driving speed, along a crest vertical curve of an existing two-lane rural road, in order to identify the most effective measure to reduce speed and define its subsequent implementation in the field. Three perceptual treatments were tested using a driving simulator: white peripheral transverse bars, red peripheral transverse bars and optical speed bars, with each one being painted along the approaching tangent to the crest vertical curve. The effects of these speed-reducing measures were investigated using a sample of forty-four participants, by comparing the driving speeds with those recorded under a baseline condition (without a treatment); these were also used to validate the driving simulator’s speed measurements with those found in the field. Moreover, subjective measures were collected, consisting of the driver’s static evaluation of the desired speed, risk perception and markings comprehension, based on screen shot pictures that represented the simulated configurations of the treatments.The findings demonstrated an overall effectiveness of the perceptual treatments, although only the red peripheral transverse bars were found to significantly reduce the driving speeds (−6 km/h). The analysis of the questionnaire yielded interesting information and demonstrated the importance of performing driving simulation tests for evaluating the effectiveness of perceptual treatments.Finally, the results confirmed the enormous potential of using driving simulators to pinpoint a number of speed-reducing measures, and consequently select the most effective one that reduces cost and promotes safety before its actual implementation in the field.     

A comparison of positive vicarious learning and verbal information for reducing vicariously learned fear

Research with children has demonstrated that both positive vicarious learning (modelling) and positive verbal information can reduce children's acquired fear responses for a particular stimulus. However, this fear reduction appears to be more effective when the intervention pathway matches the initial fear learning pathway. That is, positive verbal information is a more effective intervention than positive modelling when fear is originally acquired via negative verbal information. Research has yet to explore whether fear reduction pathways are also important for fears acquired via vicarious learning. To test this, an experiment compared the effectiveness of positive verbal information and positive vicarious learning interventions for reducing vicariously acquired fears in children (7–9 years). Both vicarious and informational fear reduction interventions were found to be equally effective at reducing vicariously acquired fears, suggesting that acquisition and intervention pathways do not need to match for successful fear reduction. This has significant implications for parents and those working with children because it suggests that providing children with positive information or positive vicarious learning immediately after a negative modelling event may prevent more serious fears developing.     

Which Are the Genuine Properties?

This article considers three views about which properties are genuine. According to the first view, we should look to successful commonsense and scientific explanations in determining which properties are genuine. On this view, predicates that figure in such explanations thereby pick out genuine properties. According to the second view, the only predicates that pick out genuine properties are those that figure in our best scientific explanations. On this view, predicates that figure in commonsense explanations pick out genuine properties only if such explanations are vindicated by the sciences. According to the third view, the only genuine properties are the fundamental, microphysical ones. On this view, although there are “higher‐level” predicates that figure in true commonsense and scientific explanations, there are no “higher‐level” properties corresponding to such predicates. The article argues that the third view is superior to the others.     

The Swedish Hayling task,and its relation to working memory,verbal ability,and speech‐recognition‐in‐noise

Cognitive functions and speech‐recognition‐in‐noise were evaluated with a cognitive test battery, assessing response inhibition using the Hayling task, working memory capacity (WMC) and verbal information processing, and an auditory test of speech recognition. The cognitive tests were performed in silence whereas the speech recognition task was presented in noise. Thirty young normally‐hearing individuals participated in the study. The aim of the study was to investigate one executive function, response inhibition, and whether it is related to individual working memory capacity (WMC), and how speech‐recognition‐in‐noise relates to WMC and inhibitory control. The results showed a significant difference between initiation and response inhibition, suggesting that the Hayling task taps cognitive activity responsible for executive control. Our findings also suggest that high verbal ability was associated with better performance in the Hayling task. We also present findings suggesting that individuals who perform well on tasks involving response inhibition, and WMC, also perform well on a speech‐in‐noise task. Our findings indicate that capacity to resist semantic interference can be used to predict performance on speech‐in‐noise tasks.     

Including Both Voices: A New Bidirectional Framework for Understanding and Improving Intergroup Relations

Methods: If successful intergroup harmony is to be achieved between two groups, then both groups' voices must be heard. Despite this, 60 years of social psychological “intergroup” prejudice research has tended to adopt a solely majority‐centric perspective, with the majority group portrayed as the active agent of prejudice, and the minority group as passive targets. Objective: This paper critically reviews relevant literature, highlighting this unidirectional imbalance, and proposes a new, two‐stage bidirectional framework, where we encourage researchers and educators to first understand how minority and majority groups' intergroup attitudes and emotions impact intergroup dynamics, before tailoring and implementing contact and recategorisation strategies to improve intergroup relations, nationally and internationally. Conclusion: We argue that the interactive nature of the intergroup dynamic needs to be better understood, and each group's voice heard, before prejudice can be effectively reduced. Lastly, we describe an Australian study, the Dual Identity and Electronic‐contact (DIEC) programme, that has been conducted and has successfully applied this bidirectional framework.     

Choice between single and multiple reinforcers in concurrent-chains schedules

Pigeons responded on concurrent-chains schedules with equal variable-interval schedules as initial links. One terminal link delivered a single reinforcer after a fixed delay, and the other terminal link delivered either three or five reinforcers, each preceded by a fixed delay. Some conditions included a postreinforcer delay after the single reinforcer to equate the total durations of the two terminal links, but other conditions did not include such a postreinforcer delay. With short initial links, preference for the single-reinforcer alternative decreased when a postreinforcer delay was present, but with long initial links, the postreinforcer delays had no significant effect on preference. In conditions with a postreinforcer delay, preference for the single-reinforcer alternative frequently switched from above 50% to below 50% as the initial links were lengthened. This pattern of results was consistent with delay-reduction theory (Squires & Fantino, 1971), but not with the contextual-choice model (Grace, 1994) or the hyperbolic value-added model (Mazur, 2001) as they have usually been applied. However, the hyperbolic value-added model could account for the results if its calculations were expanded to include reinforcers delivered in later terminal links. The implications of these findings for models of concurrent-chains performance are discussed.