Behavioral fluency and mathematics intervention research: A review of the last 20 years

Behavioral fluency refers to the relationship between the achievement of performance standards, or frequency ranges of behavior, and critical learning outcomes. Over the past 20 years, Precision Teaching and related research have contributed a number of studies examining behavioral fluency. The subsequent review investigates the empirical evidence from mathematics intervention research. Several studies suggest numerical markers that best support behavioral fluency. Results indicate that fluency interventions set to performance standards increased behavioral fluency and associated critical learning outcomes; however, more research is warranted to operationalize and standardize each outcome to the principles of behavior and numerical markers that constitute behavioral fluency.     

What Is a Nonresponder? A Qualitative Analysis of Nonresponse to a Behavioral Intervention

This study used qualitative methods to understand reasons for treatment nonresponse following a behavioral intervention for family caregivers of people with dementia. Caregivers and interventionists completed semistructured interviews about their experience of the treatment after completing a course of Resources for Enhancing Alzheimer’s Caregiver Health in VA (REACH VA). Treatment response from the 22 caregivers who completed the 12-session treatment was assessed using pre- to posttreatment change scores on measures of depression and caregiver burden. Interviews from the 14 nonresponder caregiver/interventionist dyads (28 total) were analyzed qualitatively to identify caregiver factors that negatively impacted improvement in depression and caregiver burden, such as emotional processing difficulties, wanting more support than structure, and limited support/difficulty asking for help. Ways nonresponders benefited from REACH VA beyond improvement on self-report symptom measures were also identified and included learning to problem solve more effectively, feeling understood and supported by another, and taking a different perspective on caregiving. The benefits of using qualitative methods to assess the experience of treatment nonresponders and identify individuals who may benefit from additional treatment or a different approach are discussed.     

Infants’ statistical word segmentation in an artificial language is linked to both parental speech input and reported production abilities

Individual variability in infant's language processing is partly explained by environmental factors, like the quantity of parental speech input, as well as by infant‐specific factors, like speech production. Here, we explore how these factors affect infant word segmentation. We used an artificial language to ensure that only statistical regularities (like transitional probabilities between syllables) could cue word boundaries, and then asked how the quantity of parental speech input and infants’ babbling repertoire predict infants’ abilities to use these statistical cues. We replicated prior reports showing that 8‐month‐old infants use statistical cues to segment words, with a preference for part‐words over words (a novelty effect). Crucially, 8‐month‐olds with larger novelty effects had received more speech input at 4 months and had greater production abilities at 8 months. These findings establish for the first time that the ability to extract statistical information from speech correlates with individual factors in infancy, like early speech experience and language production. Implications of these findings for understanding individual variability in early language acquisition are discussed.     

Who uses more strategies? Linking mathematics anxiety to adults’ strategy variability and performance on fraction magnitude tasks

Adults use a variety of strategies to reason about fraction magnitudes, and this variability is adaptive. In two studies, we examined the relationships between mathematics anxiety, working memory, strategy variability and performance on two fraction tasks: fraction magnitude comparison and estimation. Adults with higher mathematics anxiety had lower accuracy on the comparison task and greater percentage absolute error (PAE) on the estimation task. Unexpectedly, mathematics anxiety was not related to variable strategy use. However, variable strategy use was linked to more accurate magnitude comparisons, especially among adults with lower working memory performance or those who use mathematics less frequently, as well as lower PAE on the estimation task. These findings shed light on the role of strategy variability in fraction problem solving and demonstrate a link between mathematics anxiety and fraction magnitude reasoning, a key predictor of general mathematics achievement.     

The impact of physical activity and sex differences on intraindividual variability in inhibitory performance in older adults

It is well-known that processing speed and executive functions decline with advancing age. However, physical activity (PA) has a positive impact on cognitive performances in aging, specifically for inhibition. Less is known concerning intraindividual variability (iiV) in reaction times. This study aims to investigate the influence of PA and sex differences on iiV in inhibitory performance during aging. Healthy adults were divided into active and sedentary groups according to PA level. To analyse iiV in reaction times, individual mean, standard deviation and the ex-Gaussian parameters were considered. An interaction between activity level and sex was revealed, sedentary females being slower and more variable than sedentary men. No sex differences were found in the active groups. These results indicate that the negative impact of sedentariness on cognitive performance in older age is stronger for females. The present findings underline the need to consider sex differences in active aging approaches.     

Do meditators and non-meditators have different HRV dynamics?

PurposeThe heart is a complex system and many researchers have been recently studying cardiac behavior using the theory of nonlinear dynamical systems. One of the most appealing tools for analyzing heart function is the heart rate variability (HRV) signal. This study aimed to elucidate the HRV dynamics of six distinct states: spontaneous normal breathing (SNB) and metronomic breathing (MB), as non-meditator groups, before Chinese Chi meditation (CCM), during CCM, before Kundalini yoga meditation (KYM), and during KYM, as meditator groups.MethodsThe HRV data were obtained from the Physionet database. Lagged Poincare indices, Lyapunov exponent (LE), Lempel-Ziv complexity (LZ), and 4 types of entropy were calculated.ResultsThe results showed the greatest discrepancies in the lagged Poincare indices for KYM and CCM. In contrast, the least variations were achieved for MB. Compared to SNB, an enhancement in the log energy entropy and a reduction in the LZ and other entropies were concluded during KYM and CCM practices. In contrast, a reverse pattern was observed for MB. Using support vector machine, HRV dynamics were classified with average accuracies of 99.14 and 98.2% and average sensitivities of 99.87 and 99.57% for pre-KYM and during KYM, respectively.ConclusionIt was shown that the HRV dynamics were significantly different in meditators and non-meditators.     

网络游戏成瘾研究的争议及趋势

网络游戏成瘾(Internet Gaming Disorder, IGD)是否能被确认为独立的精神障碍?目前的争议来自三个方面:概念上难以明确IGD与正常游戏行为,其他精神障碍之间的差异, 且上瘾对象仅为网络游戏或包含线下游戏并不明确; 鉴定标准上DSM-5总结的9条标准没能刻画IGD的本质特征, 现行的18种诊断工具在内容,诊断阈限等方面参差不齐; 研究方法上缺乏理论支撑, 过分依赖问卷数据, 忽视电子游戏的积极作用.争议内容体现出研究者对网络游戏行为本身缺乏理解, 因此难以判断正常与异常的游戏行为.未来研究应考虑回退到对网络游戏行为的研究, 对网络游戏类型特点,影响网络游戏行为的各因素以及电子游戏的积极贡献做深入探讨, 以达到从本质上明确网络游戏成瘾的特质.     

Sleep-Related Problems in Pediatric Obsessive-Compulsive Disorder and Intensive Exposure Therapy

Limited research has examined sleep-related problems (SRPs) among children and adolescents with obsessive-compulsive disorder (OCD). The present study addresses this gap by investigating preliminary associations between SRPs, demographic factors (gender and age), family variables (family accommodation and parental stress), and clinical factors (medication status, internalizing and externalizing symptoms, OCD severity, OCD-related impairment), and treatment outcomes in a sample of 103 youth (aged 7 to 17 years; 53% female) with a primary diagnosis of OCD. Clinician, parent, and child measures were used to assess demographic, family, and clinical predictors. SRPs were assessed using an 8-item measure comprising items of the Child Behaviour Checklist, Child Depression Inventory, and Multidimensional Anxiety Scale for Children as used in previous studies. Results showed that SRPs were highly prevalent among this sample and that more SRPs were associated with younger age, internalizing problems, and functional impairment. However, SRPs were not an independent predictor of OCD severity, impairment, or treatment response. Preliminary findings suggest that SRPs among youth with OCD may be more strongly associated with broader internalizing symptoms than with OCD itself. Future longitudinal research is warranted to further explore the complexity of SRPs when co-occurring with pediatric OCD.     

Dissemination and Implementation of Cognitive Behavioral Therapy for Depression in the Kaiser Permanente Health Care System: Evaluation of Initial Training and Clinical Outcomes

Notwithstanding its empirical status and strong recommendation in clinical practice guidelines, cognitive behavioral therapy (CBT) continues to be delivered infrequently and with low fidelity on the clinical front lines. Recently, organized efforts and policies within the public sector to disseminate and implement CBT and other evidence-based psychotherapies have yielded encouraging results and provided optimism for bridging the research-to-practice-gap. Following from these efforts, the current article examines the initial impact and experience of the implementation of an individualized approach to CBT training and treatment within the Kaiser Permanente health care system. Initial training outcomes, including changes in general and specific competencies, were assessed using divergent assessment methods within the initial cohort of therapists undergoing training. Initial patient outcomes, including changes in depression and anxiety, were assessed among patients receiving treatment from therapists in training. Results revealed training in and implementation of CBT-D was associated with overall large improvements in therapist competencies and in clinically significant improvements in both depression and anxiety among patients. Findings from the initial phase of dissemination and implementation within a large private system provide support for, and extend recent findings related to, the feasibility and effectiveness of training in and implementation of CBT-D in a real-world context.     

Behavioral momentum and resistance to extinction across repeated extinction tests

The present experiments assessed whether resistance to extinction of pigeons' key pecking decreased across repeated extinction tests. An additional impetus for this research was to determine how the quantitative framework provided by behavioral momentum theory might be used to describe any such changes across tests. Pigeons pecked keys in two‐component multiple schedules (one component associated with a higher reinforcer rate and the other with a lower rate) in which baseline and extinction conditions alternated. In Experiment 1, baseline and extinction conditions alternated every session, and, in Experiment 2, these conditions lasted for 10 and 7 sessions, respectively. Resistance to extinction decreased across successive extinction conditions in both experiments. Fits of the behavioral‐momentum based model of extinction to the data returned uncertain results in Experiment 1 but implicated both generalization decrement and response–reinforcer contingency termination as the possible mechanisms responsible for behavior change in Experiment 2. Thus, these data suggest that experimental manipulations that affect discrimination of changes in reinforcement contingencies may influence resistance to extinction by modulating the disruptive impacts of removing reinforcers from the experimental context and of suspending response–reinforcer contingencies.