Time-of-day affects prospective memory differently in younger and older adults

The goal of this study was to investigate the impact of circadian arousal on prospective memory performance as a function of age. We tested a younger (18–34 years) and an older group (56–95 years) of participants on- and off-peak with regard to their circadian arousal patterns in a computer-based laboratory experiment. For the prospective memory task, participants had to press a particular key whenever specific target words appeared in an ongoing concreteness-judgment task. The results showed that prospective memory performance was better on- than off-peak in younger but not older participants. Younger participants consistently outperformed older participants in all conditions. We conclude that prospective remembering underlies time-of-day effects which most likely reflect controlled processes.     

Understanding “His and Her” Work-Family Conflict and Facilitation

Work-family conflict (negative spillover between work and family) and work-family facilitation (positive spillover between work and family) are two aspects of the work-family interface. Prior work has established that these constructs are statistically and conceptually distinct, but less is known about what work and family characteristics are associated with conflict versus facilitation. Understanding who is most at risk for conflict and most benefiting from facilitation is necessary for establishing effective workplace policies. We used structural equation modeling to determine whether (1) work-family conflict and facilitation have different (statistical) predictors, and (2) whether these predictive relations are moderated by gender. Perceiving more work demands predicted greater work-family conflict, but was unrelated to facilitation. Perceiving more skill discretion at work and being married predicted greater work-family facilitation, but was unrelated to work-family conflict. Perceiving more decision authority and social support at work, and having more children, predicted less conflict and more facilitation. Most predictors were stronger for men than for women. We discuss implications of these results for designing effective policies to increase work-family facilitation and decrease work-family conflict for men and women.     

Effect of acoustic cue modifications on evoked vocal response to calls in zebra finches (Taeniopygia guttata)

Besides their song, which is usually a functionally well-defined communication signal with an elaborate acoustic structure, songbirds also produce a variety of shorter vocalizations named calls. While a considerable amount of work has focused on information coding in songs, little is known about how calls' acoustic structure supports communication processes. Because male and female zebra finches use calls during most of their interactions and answer to conspecific calls without visual contact, we aimed at identifying which calls' acoustic cues are necessary to elicit a vocal response. Using synthetic zebra finch calls, we examined evoked vocal response of male and female zebra finches to modified versions of the distance calls. Our results show that the vocal response of zebra finches to female calls requires the full harmonic structure of the call, whereas the frequency downsweep of male calls is necessary to evoke a vocal response. It is likely that both female and male calls require matching a similar frequency bandwidth to trigger a response in conspecific individuals.     

Functional magnetic resonance imaging study of Piaget's conservation-of-number task in preschool and school-age children: a neo-Piagetian approach

Jean Piaget’s theory is a central reference point in the study of logico-mathematical development in children. One of the most famous Piagetian tasks is number conservation. Failures and successes in this task reveal two fundamental stages in children’s thinking and judgment, shifting at approximately 7 years of age from visuospatial intuition to number conservation. In the current study, preschool children (nonconservers, 5-6 years of age) and school-age children (conservers, 9-10 years of age) were presented with Piaget’s conservation-of-number task and monitored by functional magnetic resonance imaging (fMRI). The cognitive change allowing children to access conservation was shown to be related to the neural contribution of a bilateral parietofrontal network involved in numerical and executive functions. These fMRI results highlight how the behavioral and cognitive stages Piaget formulated during the 20th century manifest in the brain with age.     

Mimicry and helping behavior: an evaluation of mimicry on explicit helping request

Research found that mimicry behavior led to increased helping behavior toward the mimicker and is associated with higher positive evaluation of the mimicker. Furthermore, studies on helping behavior focused only on implicit helping behavior, whereas no experimental study on explicit helping request was tested. An experiment was carried out in which a female student-confederate mimicked or not mimicked a participant during a discussion about paintings and, after that, solicited the participant for a written feedback about an essay. It was found that mimicry increased compliance to the confederate's request.     

The effect of women's suggestive clothing on men's behavior and judgment: a field study

Numerous studies have shown that men overestimate the sexual intent of women based on their clothing style; however, this hypothesis has not been assessed empirically in a natural setting. This small field study measured the time it took for men to approach two female confederates sitting in a tavern, one wearing suggestive clothes and one wearing more conservative clothes. The behavior of 108 men was observed over 54 periods on 16 different nights in two different taverns. The time it took for the men to approach after initial eye contact was significantly shorter in the suggestive clothing condition. The men were also asked by male confederates to rate the likelihood of having a date with the women, and having sex on the first date. The men rated their chances to have a date and to have sex significantly higher in the suggestive clothing condition. Results are discussed with respect to men's possible misinterpretation that women's clothing indicates sexual interest, and the risks associated with the misinterpretation.     

Close to me? The influence of affective closeness on space perception

Recent data show that psychosocial factors affect visual perception. We tested this hypothesis by investigating the relationship between affective closeness and the perception of apertures between two people. People feel discomfort when they are near someone they are not affectively close to. Therefore, we predict that they will be less likely to perceive that they can pass between two people not affectively close to them. Participants had to imagine passing through the aperture between two life-size classmate pictures. We found that the closer participants felt to their classmates, the more they felt able to pass between them. This provides the first evidence of a relationship between affective closeness and the perception of aperture between two people, suggesting that psychosocial factors constrain space perception.     

Training synaesthesia

Synaesthetic inducers such as graphemes are typically cultural artifacts. Thus, a learning component seems evident in synaesthesia (Simner et al, 2009 Brain 132 57-64). Normally, synaesthetes report to have their experiences since they can remember. Nevertheless, a recent training study suggests that synaesthesia can be mimicked in non-synaesthetes. To date, the role of learning during the development of synaesthesia is still debated. It is not clear whether synaesthesia can be learned or trained at all. To address this question, we compared a non-adaptive and an adaptive training for their effectiveness. We assessed their impact on two types of priming tasks, before and after the training. We found stronger priming in the adaptive training group suggesting that adaptive training is more efficient to mimic synaesthesia.     

Listeners influence speakers’ perceived communication effectiveness

People have an exaggerated sense of self-efficacy. This paper investigates the mechanism behind speakers’ tendency to overestimate their communication efficacy. Two competing mechanisms were tested: intrapersonal and interpersonal. Speakers communicated a series of ambiguous statements to a co-present or absent listener and then estimated their success. Speakers overestimated their ability to communicate their intended message (relative to listeners’ actual comprehension of their message) when a listener was co-present, but not when a listener was absent. Our findings support an interpersonal explanation of speakers’ perceived communication efficacy.     

Is it typical? The ecological validity of the observation of mother-father-infant interactions in the Lausanne Trilogue Play

The Lausanne Trilogue Play (LTP) is a widely used laboratory situation designed for the systematic observation of mother-father-infant interactions for clinical and research purposes. Nevertheless, its ecological validity has never been tested. In this exploratory study, 49 primiparous parents with their 3-month-old infants were assessed by questionnaires to determine the extent to which their behaviour in the LTP was typical, that is, representative of everyday interactions. Results show that (a) most of the parents assessed their behaviour as typical and (b) the quality of triadic interactions was linked with parents’ assessment of the typicality of the infant’s behaviour.