父母学业参与、父母学业压力与青少年早期的学业投入:有调节的中介模型

为探讨父母学业参与和学业压力与青少年早期学业投入之间的关系,考察成就目标取向的中介作用,以及学业成就水平在该中介过程中的调节作用,对2487名初一学生进行测查,结果发现：（1）父母学业参与正向预测青少年早期个体的学业投入、负向预测学业抽离,父母学业压力正向预测学业抽离;（2）掌握目标取向在父母学业参与和青少年早期的学业投入之间起正向中介作用,在父母学业参与和学业抽离间发挥负向中介作用;表现回避目标取向在父母学业压力和学业抽离间具有正向中介作用;（3）掌握目标取向的中介作用受到学业成就水平的调节。研究结果揭示了父母学业参与和学业压力对青少年早期的学业投入的共同作用,为从家庭层面提高青少年的学业投入水平提供了参考。     

Biobehavioral effects of extended salt loading and conflict stress in intact baboons.

Behavioral stressors may inhibit sodium excretion, potentially increasing plasma volume and elevating blood pressure during chronic exposure. Blood pressure regulation may be especially deranged during manipulations that further challenge the kidney, such as a diet high in salt content. The effects on blood pressure and other variables of combined behavioral stress (food/shock conflict) and dietary salt (12 g NaCl per day; 218 mEq Na+ per day) were examined in adult male baboons over the course of 1 year. Mean arterial pressure was not significantly elevated over baseline after 5 months of high dietary salt alone (6 +/- 5 mmHg) but was maximally elevated by an average of 17 (+/- 3 SEM) mmHg after 5 months of combined salt and conflict stress. Control baboons showed no significant trends in mean arterial pressure across the same time period. Individual subjects whose blood pressure was "salt+stress resistant" or "salt+stress sensitive" were differentiated by their degree of pressure diuresis and natriuresis, urinary free cortisol, and a behavioral index of stress sensitivity. The data indicate additive effects of chronic high dietary salt intake and behavioral stressors on blood pressure in nonhuman primates that are dependent on renal function and pituitary-adrenocortical activity.     

Enhancement of conditioned autonomic responses in monkey when preshock signals occasion operant suppression.

Classical pairings of a sound stilulus with shock elicited larger magnitude and more rapidly conditioned autonomic responses when subjects were responding on variable-interval schedules for food than when they were eating freely available food. The difference was not attributable to changes in control values of heart rate and blood pressure, or to alterations in motor activity, but appeared related to operant suppression.     

The impact of courteous and discourteous drivers on physiological stress

Prior studies into road safety have concentrated largely on studying unsafe forms of driving behaviour such as aggressive, stressed, and risky driving. Little attention has been given to ‘positive’ driving behaviour, such as how pro-social driving may help to promote cooperation with other road users and decrease incidences of aggressive and stressful driving. This study aimed to compare the impact of courteous and discourteous driving on the immediate physical health of other drivers (blood pressure, heart rate, and markers of stress) whilst controlling for other recognized factors responsible for driver stress such as road infrastructure (e.g. roadworks, traffic lights, freeways) and driving maneuvers (e.g. merging, tail-gaiting, navigating roundabouts). Using actors in a deception study, a naturalistic driving scenario was created in a lab-based simulation. All participants (n = 10; 39 ± 14.5 years) drove the same route in a simulator and engaged with the same driving behaviours and other virtual road users on two separate occasions separated by 7 days. The difference between conditions was whether the participant interacted with other drivers who displayed: a) courteous or b) discourteous behaviours. Blood pressure, heart rate variability and salivary hormone concentrations (cortisol and alpha amylase) were measured before and immediately after each simulated drive. After interacting with the discourteous drivers, participants experienced significantly higher mean arterial blood pressure, systolic and diastolic pressure, central systolic and diastolic pressure, and heart rate, and lower heart rate variability (indicative of acute stress) compared to interacting with the courteous drivers. Conversely, these markers of stress were reduced after interacting with the courteous drivers. The results support courtesy on the road to provide short-term benefits for the recipient of the action, while also increasing road safety more generally.     

A Closer Look at Eyespot Effects on Voter Turnout: Reply to Matland and Murray

Implicit social pressure, applied via exposure to eyespots in nonpartisan, direct‐mail blandishments to vote, has been shown using randomized field experiments to raise turnout in elections. Similar eyespot effects have been observed across a wide range of prosocial behaviors. A series of recent replications conducted by Matland and Murray (2015) have failed to consistently produce statistically significant eyespot effects on voter turnout, however, leading the authors to conclude the effects observed in previous research were likely illusory. In this article, I rebut this claim, arguing that an alternative, more circumspect interpretation of the authors’ key results points to a different conclusion that supports the notion that eyespots likely stimulate voting, especially when taken together with previous findings.     

These Eyes: A Rejoinder to Panagopoulos on Eyespots and Voter Mobilization

Get‐out‐the‐vote mailers using explicit social pressure consistently increase electoral turnout; however, they often generate a negative reaction or backlash. One approach to increase turnout, yet alleviate backlash, may be to use implicit social pressure. An implicit social pressure technique that has shown promise is to display a set of eyes. Researchers contend eyes generate a feeling of being watched, which cues subjects to act in more prosocial ways to demonstrate compliance with social norms. Several studies support this argument, including two voter mobilization studies. The technique has not been widely tested, however, in the political context. In five randomized field experiments, we test the impact on turnout of mobilization mailers using eye displays. We extend previous research by testing for differences in effects between male and female eyes and across political cultures. The effects are substantively and statistically weak at best and inconsistent with previous findings.     

Effects of duration of wearing high-heeled shoes on plantar pressure

In the present study we investigated the effects of different durations of using high-heeled shoes on plantar pressure and gait. A questionnaire survey and dynamic plantar pressure measurements were performed in 20 control females and 117 females who had worn high-heeled shoes for a long time. According to the duration of using high-heeled shoes (as specified in the questionnaire), subjects were divided into a control group and five groups with different durations of use (i.e. <2 years, 2–5 years, 6–10 years, 11–20 years and >20 years). Parameters, including peak pressure, impulse and pressure duration, in different plantar regions were measured with the Footscan pressure plate. The 2–5 years group had smaller midfoot contact areas for both feet and higher subtalar joint mobility, while the 6–10 years group had larger midfoot contact areas for both feet and prolonged foot flat phase during gait. The peak pressure and impulse under the second and fourth metatarsus were increased with the prolonged wearing of high-heeled shoes, and the pressure and impulse under the midfoot were substantially reduced in the 2–5 years group. The findings suggest that long-term use of high-heeled shoes can induce changes in arch morphology: the longitudinal arch tends to be elevated within 2–5 years; the longitudinal arch tends to be flattened within 6–10 years; and the forefoot latitudinal arch tends to collapse in more than 20 years.     

Absolute asymmetric electrochemical polymerization

Electrochemical polymerization of thiophene-based achiral monomer having azobenzene as a chromophore irradiated by circular polarized light (CPL) was carried out to obtain chiroptically active polymer film on indium-tin oxide-coated glass. Circular dichroism and optical absorption spectroscopy measurements indicate the samples show chiroptical activity. This result indicates occurrence of absolute asymmetric polymerization by laser CPL.     

Community Identity Increases Urban Residents' In‐group Emergency Helping Intention

The current study examined how time pressure and community identity affected urban residents' in‐group emergency helping intention with a sample of 88 Chinese urban residents from a common community. Firstly, we instructed participants to fill out the Community Identity Scale. Following this, we set a hypothesized scenario, in which they met a fainted person in community when they left the community either in a hurry or not, to measure helping intention. It was found that time pressure had little impact on urban residents' in‐group helping intention, whereas community identity increased in‐group helping intention. Moreover, emotional identity but not functional identity positively predicted in‐group helping intention. These findings and their implications for community psychology were discussed. Copyright © 2016 John Wiley & Sons, Ltd.