低静息心率与反社会行为的关系

由于静息心率易测性, 对静息心率的研究成为研究攻击和犯罪行为生理机制的重要手段之一。研究发现低静息心率与多种反社会行为存有关, 无论是动物研究, 人类研究还是跨文化的研究都表明了这种关系的存在。但元分析的结果表明低静息心率与反社会行为之间关系的效应量只是中等水平。同时, 社会经济因素和人格因素对低静息心率与反社会行为之间的关系有影响。低静息心率可能与低恐惧或低唤醒的特质、去甲肾上腺素功能减弱、大脑右半球功能减弱等因素有关。     

The impact of residential context on adolescents' Subjective Well being

The study investigates the impact of residential context on stressful events and Subjective Well being (Emotional and Psychological) in young people living in a deprived geographical area, and the mediating role of personal (Self‐Efficacy) and social (Social Support, Sense of Community) variables. A questionnaire was submitted to 297 subjects (48.5% males): 203 adolescents (14–19 years old) and 94 young adults (20–27 years old), from different socio‐economic (SES) levels. Results confirm the significant impact of the residential context on youngsters' perceived residential quality, Stress and Subjective Well being outcomes; such effect partly differs according to participants' gender and age. Adolescents are less satisfied of their living context and enjoy lower well being than young adults. Social resources (Friend and Family Support) significantly buffer the effect of a deprived residential context of youngsters' Well being, whereas personal resources (Self‐Efficacy) directly increase Well being levels. Copyright © 2008 John Wiley & Sons, Ltd.     

Bayesian IRT Guessing Models for Partial Guessing Behaviors

According to the recent Nation’s Report Card, 12th-graders failed to produce gains on the 2005 National Assessment of Educational Progress (NAEP) despite earning better grades on average. One possible explanation is that 12th-graders were not motivated taking the NAEP, which is a low-stakes test. We develop three Bayesian IRT mixture models to describe the results from a group of examinees including both nonguessers and partial guessers. The first assumes that the guesser answers questions based on his or her knowledge up to a certain test item, and guesses thereafter. The second model assumes that the guesser answers relatively easy questions based on his or her knowledge and guesses randomly on the remaining items. The third is constructed to describe more general low-motivation behavior. It assumes that the guesser gives less and less effort as he or she proceeds through the test. The models can provide not only consistent estimates of IRT parameters but also estimates of each examinee’s nonguesser/guesser status and degree of guessing behavior. We show results of a simulation study comparing the performance of the three guessing models to the 2PL-IRT model. Finally, an analysis of real data from a low-stakes test administered to university students is presented.     

Depression in the early postpartum period and attachment to children—in mothers of NICU infants

Depression in early puerperium was evaluated in terms of maternal attachment in mothers of children admitted to the neonatal intensive care unit (NICU) in comparison to a control group of mothers of full‐term infants. A survey including Zung's self‐rating depression scale (ZSDS), a postpartum maternal attachment scale and items addressing the mother's feelings and peripheral conditions was conducted on mothers of children admitted to the NICU. Among the 153 mothers who gave valid responses, positive ZSDS scores of over 40 were seen in 61.8%. In terms of the children's disorder, strong depressive tendency was noted among mothers of low birth weight infants. Significant correlation was noted between the ZSDS and the ‘core maternal attachment’ (negative correlation) and ‘anxiety regarding children’ (positive correlation) subscales of postpartum maternal attachment. Path analysis revealed the father's positive reaction in learning of the pregnancy resulted in elevation of the ‘core maternal attachment’ score, in contrast to the control group mothers. Copyright © 2003 John Wiley & Sons, Ltd.     

Comments on “Getting scarred and winning lotteries: Effects of exemplar cuing and statistical format on imagining low‐probability events,” By Newell,Mitchell, and Hayes (2008)

Newell, Mitchell, and Hayes (NMH) conduct three experiments designed to test whether exemplar cuing (EC) theory or a statistical format theory provides a more accurate account for how people make judgments about low‐probability events. They report finding support for the statistical format theory and little or no support for EC. However, NMH misstate the requirements for the production of exemplars in EC theory. As a result, they confuse non‐exemplar conditions with exemplar conditions in their experiments, and find results that are virtually irrelevant to EC theory. Copyright © 2009 John Wiley & Sons, Ltd.     

Within-session changes in responding during several simple schedules

Pigeons' key pecking was reinforced by food delivered by several fixed-interval, variable-ratio, and differential-reinforcement-of-low-rate schedules. Rate of responding, number of responses per reinforcer, length of postreinforcement pause, running response rate, and the time required to collect an available reinforcer changed systematically within sessions when the schedules provided high rates of reinforcement, but usually not when they provided low rates. These results suggest that the factors that produce within-session changes in responding are generally similar for different schedules of reinforcement. However, a separate factor may also contribute during variable-ratio schedules. The results question explanations for within-session changes that are related solely to the passage of time, to responding, and to one interpretation of attention. They support the idea that one or more factors related to reinforcement play a role.     

Effects of magnitude of food reinforcement on free-operant response rates

In Experiment 1 rats were trained to press a lever on a variable-ratio schedule of food presentation and were then exposed to progressively increasing magnitudes of food reinforcement. Response running rates (rates exclusive of the postreinforcement pause) were found to increase as a function of increasing reinforcement magnitudes. The effect of reinforcement magnitude on response rates inclusive of the postreinforcement pause, however, was less pronounced. Increases in the magnitude of reinforcement were also found to increase the length of the postreinforcement pause. Rats in Experiment 2 were trained to respond on a chained differential-reinforcement-of-low-rate variable-ratio schedule, and were exposed to increasing magnitudes of reinforcement as in Experiment 1. Response running rates increased in the variable-ratio component but decreased in the other component of the schedule. The results are discussed with reference to incentive accounts of reinforcement and the action of reinforcement on the response units generated by the operative contingencies.     

Communicative skills in relation to gender, birth order, childcare and socioeconomic status in 18-month-old children

Variation in communicative skills, defined as gestures, vocabulary comprehension and vocabulary production, was examined as a function of gender, birth order, childcare and socioeconomic status (SES) in 1,019 18-month-old children. The children were recruited at their regular check-up at a number of randomly selected Child Health Care centers in a Swedish county. The participation rate was 88%. The children were assessed by their mothers using a short version of the Swedish Early Communicative Development Inventories. The results demonstrate significant effects of gender and birth order on vocabulary comprehension and vocabulary production. Girls scored higher than boys and first-born children scored higher than later-born children. Type of childcare (family care, care at home and day-care centers) interacted with gender and birth order on vocabulary production and indicated that family care is not as advantageous as care at home or at day-care centers. SES had no effect on children's communicative skills at this age.     

Implementing a differential reinforcement of low rates schedule to alter vocal stereotypy and task engagement in two adolescents with autism spectrum disorder

Vocal stereotypy (VS) is often observed in individuals with autism spectrum disorder (ASD) which at high rates can interfere with socialization or functioning in structured settings. There are multiple effective interventions available; yet, many procedures target the complete omission of the behavior or are only assessed at short intervals, making it unclear how they will generalize in applied settings. One intervention yet to be assessed as an individual intervention for automatically reinforced VS is differential reinforcement of low rates of behavior (DRL). In the present study, a functional analysis determined that the VS of two female adolescents with ASD was maintained by automatic reinforcement. A DRL procedure was implemented which incorporated: (a) a specified interval for reinforcement; (b) the behavioral expectations; (c) the permissible instances of VS within the interval; (d) learner feedback; and (e) the reset/non-reset aspect of the schedule. As the targeted behavior decreased across sessions, the DRL interval was systematically increased in order to thin out the schedule of reinforcement. The intervention reduced VS and increased untargeted task engagement for both participants. Applied and theoretical implications of the study as well as social validity, limitations, and future research are discussed.     

The Head,the Heart,and the Community: Piloting a Brief Home-Based Mindfulness Intervention for Couples With Low Income

Although mindfulness is documented to reduce both individual and relationship stress and has the flexibility to be taught anywhere (e.g., at home, clinic setting, etc.), research examining mindfulness interventions among individuals with low income and economic marginalization (LIEM; APA, 2019), or persons whose economic position negatively impacts their health or well-being due to factors such as access to healthcare, is limited. To address this gap, the author and colleagues used Community Based Participatory Research methods to develop a brief, couple-based, mindfulness intervention tailored for communities with LIEM (see Lenger et al., 2022). The present study tested this newly developed brief, couple-based, mindfulness intervention's effectiveness in improving individual and relationship health through 1- and 2-months post-intervention. The intervention was piloted on a sample of 39 couples with an overrepresentation of couples with LIEM. To improve access to care, couples could participate in their home or a variety of local clinics. Thirty-nine couples received the intervention and completed assessments on mindfulness, depression, anxiety, stress, relationship satisfaction, and communication at baseline, 1-month, and 2-months post-intervention. Results revealed that mindfulness, depression, and relationship satisfaction improved from baseline to 1-month post-intervention. Mindfulness improved at a greater rate for couples with LIEM relative to couples with higher incomes. From baseline to 2-months post-intervention, depression and stress significantly improved at similar rates for couples with higher income and couples with LIEM. Thus, this study indicates that mindfulness can be taught in a brief, two-session format, and can have favorable outcomes on individual and relationship functioning.