Personality traits and body mass index: Modifiers and mechanisms

Objective: To identify how demographic factors (sex, age, ethnicity) modify the association between personality traits and body mass index (BMI) and to test the extent that diet and physical activity account for the personality-BMI relations.

Design: Cross-sectional study with a diverse sample (N = 5150, 50% female, 19% African American, 15% Hispanic). Participants completed a measure of the five major dimensions of personality and reported on their physical activity, diet and food intake behaviour, and height and weight.

Main Outcome Measures: BMI and obesity (BMI ≥ 30).

Results: High Neuroticism was associated with higher BMI and risk for obesity, whereas Conscientiousness and, to a lesser extent, Extraversion and Openness were protective. These associations were generally stronger among women and older participants; there was less evidence for ethnicity as a moderator. Personality had similar relations with the behavioural factors, and physical activity, diet and regular meal rhythms accounted for approximately 50% of the association between Neuroticism and Conscientiousness and BMI.

Conclusion: This study supports the links between personality traits and BMI and suggests that physical activity, more than diet, is a key factor in these associations.     

Mechanisms of behavioural maintenance: Long-term effects of theory-based interventions to promote safe water consumption

Theory-based interventions can enhance people’s safe water consumption, but the sustainability of these interventions and the mechanisms of maintenance remain unclear. We investigated these questions based on an extended theory of planned behaviour. Seven hundred and ten (445 analysed) randomly selected households participated in two cluster-randomised controlled trials in Bangladesh. Study 1 promoted switching to neighbours’ arsenic-safe wells, and Study 2 promoted switching to arsenic-safe deep wells. Both studies included two intervention phases. Structured interviews were conducted at baseline (T1), and at 1-month (T2), 2-month (T3) and 9-month (T4) follow-ups. In intervention phase 1 (between T1 and T2), commitment-based behaviour change techniques – reminders, implementation intentions and public commitment – were combined with information and compared to an information-only control group. In phase 2 (between T2 and T3), half of each phase 1 intervention group was randomly assigned to receive either commitment-based techniques once more or coping planning with reminders and information. Initial well-switching rates of up to 60% significantly declined by T4: 38.3% of T2 safe water users stopped consuming arsenic-safe water. The decline depended on the intervention. Perceived behavioural control, intentions, commitment strength and coping planning were associated with maintenance. In line with previous studies, the results indicate that commitment and reminders engender long-term behavioural change.     

Diagnostic morbidity and its relationship to severity of ideation for a nonpsychiatric sample of chronic and severe suicide ideators

This study examined the relationships of frequency and type of psychiatric diagnosis to suicidality within a sample of chronically and severely ideating college-aged students (N=78). The most common diagnoses were the depressive disorders, comprising 43% of all diagnoses, followed by anxiety disorders, comprising 17% of all diagnoses. Retrospective reports of childhood diagnoses were also quite common, comprising 38% of all diagnoses. Number of psychiatric diagnoses was significantly correlated with severity of suicidal ideation (r=.27,p<.02). Hierarchical regression analyses revealed that retrospective childhood diagnoses of attention deficit hyperactivity disorder (ADHD) and separation anxiety disorder significantly predicted 19% of the variance in severity of suicidal ideation after controlling for current diagnoses of major depression and PTSD. When entry of childhood and current diagnoses were reversed, PTSD significantly predicted 4% of the variance in severity of suicidal ideation, while major depression was rendered nonsignificant. Severe suicide ideation, therefore, may be a product of early psychological problems as well as the number of such problems.     

Predicting Quality of Life After Lumbar Spondylodesis

Quality of life after spondylodesis was predicted by pretreatment psychological variables and findings in a standardized physical examination. Four quality-of-life criteria were used: functional capacity, vocational rehabilitation, satisfaction with the outcome of the operation, and pain intensity recorded in a pain diary. Those of six presurgery variables that proved to be associated with the outcome 9 months postsurgery, by means of a multiple stepwise regression procedure, were selected for discriminant analyses. The sample consisted of 50 consecutive patients who underwent either ventral (n = 10) or posterolateral (n = 40) spondylodesis with or without posterior instrumentation. Their average age was 44.9 years (SD = 12.9) with an average duration of pain of 8.6 years (SD = 8.8). Nearly half of the patients had had previous spine surgery. Follow-up data indicate that about half of the patients show a beneficial outcome in terms of quality-of-life measures. Discriminant analyses suggest that poor presurgical functional capacity and an unclear finding in the physical examination before surgery contribute to our knowledge about patients who are likely to show continuous pain and poor functional capacity after surgery.     

A case study of expert judgment: Economists' probabilities versus base-rate model forecasts

In this case study of economists' forecasts concerning economic downturn, we examine key issues concerning the psychology of prediction and the controversy surrounding the value of expertise in forecasting. We examine when experts' knowledge promotes forecast accuracy and whether biases found in psychological studies (including underutilization of relevant base rates and tendencies to extreme prediction) occur in these economic forecasts. Experts' forecasts were compared to forecasts derived from base-rate models that relied on the historical frequencies of economic downturns. The performance patterns of the experts and models crossed over the forecast horizon. Experts outperformed models in shorter-term forecasting, whereas models outperformed experts in longer-term forecasting. These results highlight the abilities and limits of experts and models in prediction and the sources of their inaccuracy.     

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。     

Gender and its contribution to the prediction of cognitive abilities at 5 years

Gender-related differences in the prediction of five year-olds' cognitive abilities from measures of distal environment, proximal environment and infant test scores were examined in a random sample of 93 boys and 90 girls. Distal environmental data included maternal IQ, maternal and paternal education. Proximal environmental data included two variables derived from the Home Screening Questionnaire: the Home Questions and the Toy Checklist. The Bayley MDI was administered at age 13 months, whereas WPPSI-R was used as cognitive outcome measure at age 5 years. The relationship between paternal education and child IQ, and between proximal environmental variables and child IQ was significantly stronger for boys than for girls. The associations between proximal environment and IQ in boys, were accounted for by the distal environmental variables. Bayley MDI correlated significantly higher with girls' IQ compared to boys' IQ. Findings are discussed in terms of parental gender-differentiated socialization processes.     

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。     

Accueil des réfugiés en France : le point de vue des Français d’origine maghrébine et des Français « natifs »

Studies on attitudes towards refugees in France have only focused on “native” French people. Extending the study beyond the majority group is important, given the multicultural composition of contemporary Western societies. To this end, 144 “native” French and 109 Maghrebi-French were surveyed. We first tested the model whereby the link between national identification and prosocial intentions towards refugees is mediated by the threat perception, with the group of origin as a moderating variable. This model only applies to “native” French. We then took a closer look at the precursors of prosocial intentions among Maghrebi-French (national identity misrecognition , individualistic/collectivistic orientation). Identity misrecognition correlates positively with prosocial intentions. When controlling for other variables, collectivism is the factor that best predicts the expression of these intentions. Overall, our study showed that depending on the group of origin (“natives” vs. Maghrebi-French), we react differently to refugees. However, even if the feeling of identity misrecognition among Maghrebi-French seems to be associated with the expression of prosocial intentions, the extent of its negative consequences should not be overlooked.     

A preliminary study of an online pain management programme for patients with ankylosing spondylitis

This study was a preliminary attempt to develop and examine an online pain management programme incorporating mindfulness‐informed exercises (i.e. breathing and body scanning exercises) and CBT elements for ankylosing spondylitis patients. Thirty patients diagnosed with ankylosing spondylitis participated in a five‐week online pain management programme, which was delivered primarily through a website. The materials covered by the website included breathing and body scanning exercises, mindful walking exercise, positive thinking and management of dysfunctional thinking. Each participant received instructions and reminders from a counselling psychologist through electronic communications each week. They completed the Brief Pain Inventory, Ryff's Psychological Well‐being Scale, Pain Self‐Efficacy Questionnaire, Pain Catastrophizing Scale and Cognitive and Affective Mindfulness Scale‐Revised before and after the treatment programme. In addition, four face‐to‐face focus groups were conducted to yield supplementary qualitative findings. The overall results indicate that this online pain management programme can improve sleep quality and reduce pain interference and catastrophic responses to pain in ankylosing spondylitis patients, albeit being not very effective for mitigating the intensity of pain. Moreover, male and female patients can benefit equally from the online programme. Findings from the focus groups revealed some challenges faced by local patients when practising mindfulness‐informed exercises. Some solutions to those challenges were put forward in accordance with patients’ feedback.