Mindfulness meditation and relaxation training increases time sensitivity.

Two experiments examined the effect of mindfulness meditation and relaxation on time perception using a temporal bisection task. In Experiment 1, the participants performed a temporal task before and after exercises of mindfulness meditation or relaxation. In Experiment 2, the procedure was similar than that used in Experiment 1, except that the participants were trained to mediate or relax every day over a period of several weeks. The results showed that mindfulness meditation exercises increased sensitivity to time and lengthened perceived time. However, this temporal improvement with meditation exercises was primarily observed in the experienced meditators. Our results also showed the experienced meditators were less anxious than the novice participants, and that the sensitivity to time increased when the level of anxiety decreased. Our results were explained by the practice of mindfulness technique that had developed individuals' abilities in devoting more attention resources to temporal information processing.

The conscious awareness of time distortions regulates the effect of emotion on the perception of time.

This study examined how the awareness of emotion-related time distortions modifies the effect of emotion on time perception. Before performing a temporal bisection task with stimulus durations presented in the form of neutral or emotional facial expressions (angry, disgusted and ashamed faces), some of the participants read a scientific text providing either correct or incorrect information on the emotion-time relationship. Other participants did not receive any information. The results showed that the declarative knowledge allowed the participants to regulate (decrease) the intensity of emotional effects on the perception of time, but did not trigger temporal effects when the emotional stimuli did not automatically induce emotional reactions that distorted time.

Affective experiences during COVID-19 pandemic lockdown and posttraumatic growth: A 1-year longitudinal study in France.

BACKGROUND: The COVID-19 crisis has resulted in major restrictions on daily life that are undeniably detrimental to individual wellbeing. Nevertheless, there may be positive psychological changes over the longer term, particularly in the form of posttraumatic growth (PTG). METHODS: A total of 1075 individuals representative of the French population took part in an online survey during the first lockdown (T1: March to May 2020) and 1 year later (T2). Their affective experiences at T1 were analyzed, together with the development of PTG at T2. RESULTS: Three affective profiles were identified at T1: one associated with feelings of loneliness and depressive symptoms (Loneliness cluster), one with positive feelings (Happiness cluster), and one with rather negative feelings of anger and fear, but also a feeling of happiness (Negative-moderate cluster). PTG was generally low at T2, with the Negative-moderate cluster achieving the highest score. LIMITATIONS: This study was based on an online survey, and an exploratory cluster analysis was conducted. Complementary studies should be conducted to determine the predictive value of our findings. CONCLUSIONS: Within the space of 1 year following the first lockdown due to COVID-19, people living in France, especially those who had experienced a mixture of feelings during lockdown, appeared to develop some form of PTG. Nevertheless, PTG was rather weak overall.

Emotion and food. Do the emotions expressed on other people's faces affect the desire to eat liked and disliked food products?

The aim of the present study was to test if pleasure, neutrality and disgust expressed by other individuals on a photograph could affect the desire to eat liked or disliked food products. Forty-four men and women were presented with two series of photographs. The first series of photographs was composed of six food photographs: three liked and three disliked food products. The second series consisted of the same photographs presented with eaters expressing three different emotions: disgust, pleasure or neutrality. Results showed that the effect of the presence of an eater, and of emotions expressed by this eater, depended on the food category. For the liked foods, the desire to eat was higher when these foods were presented alone than with an eater expressing neutral emotion. When the eater expressed pleasure, the desire to eat these liked foods did not significantly increase. In contrast, when the eater expressed disgust, the desire to eat them significantly decreased. When the foods were disliked, the influence of the pleasant social context was stronger than for the liked foods. The desire to eat the disliked foods actually increased in the presence of an eater expressing pleasure. On the contrary, the disgust and neutral context had no effect on the desire for disliked foods.

Counting in a time discrimination task in children and adults.

The present study investigated in 5- and 8-year-olds, as well as in adults, the effect of verbal counting on temporal discrimination behavior in a generalization task with two duration ranges in order to test the scalar timing property. The results showed that counting improved temporal sensitivity in all age groups, although sensitivity to time remained lower in the younger children. Furthermore, in the 5-year-olds, the temporal generalization behavior conformed well to the scalar property of variance both in the counting and the non-counting condition. However, this conformity to the scalar timing property disappeared when counting was used in the 8-year-olds and the adults. The development of the ability to count time at a constant rhythm is discussed as the major reason for this departure of temporal behavior from the scalar property of variance when counting is employed.

Cognitive abilities required in time judgment depending on the temporal tasks used: A comparison of children and adults.

The aim of this study was to examine age-related differences in time judgments during childhood as a function of the temporal task used. Children aged 5 and 8 years, as well as adults, were submitted to 3 temporal tasks (bisection, generalization and reproduction) with short (0.4/0.8 s) and long durations (8/16 s). Furthermore, their cognitive capacities in terms of working memory, attentional control, and processing speed were assessed by a wide battery of neuropsychological tests. The results showed that the age-related differences in time judgment were greater in the reproduction task than in the temporal discrimination tasks. This task was indeed more demanding in terms of working memory and information processing speed. In addition, the bisection task appeared to be easier for children than the generalization task, whereas these 2 tasks were similar for the adults, although the generalization task required more attention to be paid to the processing of durations. Our study thus demonstrates that it is important to understand the different cognitive processes involved in time judgment as a function of the temporal tasks used before venturing to draw conclusions about the development of time perception capabilities.

Is the desire to eat familiar and unfamiliar meat products influenced by the emotions expressed on eaters' faces?

The aim of the present study was to test if the social context represented by eaters' faces expressing emotions can modulate the desire to eat meat, especially for unfamiliar meat products. Forty-four young men and women were presented with two series of photographs. The first series (non-social context) was composed of eight meat pictures, four unfamiliar and four familiar. The second series (social context) consisted of the same pictures presented with eaters expressing three different emotions: disgust, pleasure or neutrality. For every picture, the participants were asked to estimate the intensity of their desire to eat the meat product viewed on the picture. Results showed that meat desire depended on interactions between product familiarity, social context and the participant's gender. In the non-social context, the men liked the familiar meat products more than the women, whereas their desire to eat unfamiliar meat products was similar. Compared to the non-social context, viewing another person eating with a neutral and a happy facial expression increased the desire to eat. Furthermore, the increase in the desire to eat meat associated with happy faces was greater for the unfamiliar than for the familiar meat products in men, and greater for the familiar than for the unfamiliar meats in women. In the presence of disgusted faces, the desire to eat meat remained constant for unfamiliar products in all participants whereas it only decreased for familiar products in men.

Emotions generated by meat and other food products in women.

Eating behaviour depends partly on food preference, which is itself determined by different types of emotions. Among the emotions generated by food, disgust with red meat is common in women and can lead to reduced meat consumption. We tested the hypothesis that low meat intake is related to different negative emotions towards meat but does not affect the emotions expressed towards other food categories. Food intake of sixty women was followed throughout each day for 1 week and allowed us to assign women to two groups (low v. high meat-eating women). They were then invited to assess the intensity of twenty-six emotions described by words and induced by thirty food pictures. We determined the number of necessary dimensions to describe the space created by the twenty-six words. The results showed differences in emotions between the low and high meat-eating women. As expected, there were overall differences in the emotions generated by the thirty food pictures. Six clusters of emotions were necessary and sufficient to summarise the emotional space. These dimensions were described by 'disappointment', 'satisfaction', 'guilt', 'doubt', 'amused' and 'indifference'. As expected, the low meat-eating women felt more 'disappointment', 'indifference' and less 'satisfaction' towards meat than did the high meat-eating women. However, the low meat-eating women also stated other negative emotions such as 'doubt' towards some starchy foods. The only foods that they liked more than high meat-eating women were pears and French beans. In conclusion, low meat consumption was associated with specific negative emotions regarding meat and other foods.

Time estimation in young children: an initial force rule governing time production.

Children aged 3 and 5 1/2 years were asked to carry out a response duration task in two sessions under "minimal", "temporal" and "force" instructions. In session 1, they were told to press "long enough" for the temporal instructions and "hard enough" for the force instructions. In session 2, they were asked to press "longer" or "harder" than in the previous session. Results showed that the force instructions, but not the temporal instructions, improved the 3-year-olds' timing accuracy. Furthermore, when instructed to press harder, 3-year-olds pressed longer. In contrast, 5 1/2-year-olds were more accurate with the temporal than with the force instructions; and when asked to press harder, they did not press longer. These findings suggest that 3-year-olds rely on a certain amount of force to produce correct response durations. The marked dissociation between force and duration only emerges between the ages of 3 and 5 1/2.

Temporal bisection in children.

Children aged 3, 5, and 8 years received training on a temporal bisection task, with standard short and long durations being presented as visual stimuli lasting 1 and 4 s or 2 and 8 s. Nonstandard comparison stimuli were spaced linearly between the standards. Psychophysical functions showed increasing proportions of "long" responses (responses appropriate to the long standard) with increasing stimulus duration, but were flatter in the younger children than in the 8-year-olds. Bisection points (the stimulus duration giving rise to 50% "long" responses) were close to the arithmetic mean of the short and long standards in most conditions. Statistical analyses and results from different theoretical models of the data all suggested that temporal sensitivity was higher in the 8-year-olds than in the younger groups, even when the possibility of random responding was controlled for.

Variability in 5- and 8-year-olds' memory for duration: an interfering task in temporal bisection.

The purpose of this experiment was to investigate 5- and 8-year-olds' long-term memory for stimulus duration in a bisection task. Children were trained to discriminate between a short and a long standard duration presented as visual stimulus for 2 and 8 s, respectively. They had then to decide whether an intermediate stimulus duration was more similar to the short or to the long standard in two identical testing phases separated by an interfering task lasting for 15 min (immediate test vs. deferred test). The results showed that the 5- and the 8-year-olds produced orderly psychophysical functions. However, the 8-year-olds produced psychophysical functions, which increased more abruptly with the increasing stimulus duration. Nevertheless, whatever the age of children tested, the psychophysical function curves were flatter in the deferred test than in the immediate test, and more particularly in the 5-year-olds. Furthermore, the 5-year-olds produced fewer 'long' responses in the deferred than in the immediate test. Modeling of the data suggests that the variability of the representation of the standard in long-term memory was higher in the 5- than in the 8-year-olds and that the interfering task increased this memory variability.

Temporal generalization in 3- to 8-year-old children.

Children aged 3, 5, and 8 years were tested on temporal generalization with visual stimuli. Different groups received 4- and 8-s standards. Gradients at all ages superimposed when plotted on the same relative scale, indicating underlying scalar timing. The principal developmental changes were (i) increasing sharpness of the generalization gradient with increasing age and (ii) a change from symmetrical (3 and 5 years) to adultlike asymmetrical generalization gradients in the oldest children. Theoretical modeling attributed these changes to increasing precision of the reference memory of the standard with increasing age, as well as a decreased tendency to "misremember" the standard as being shorter than it actually was, as the children developed.

Nutritional knowledge and concerns about meat of elderly French people in the aftermath of the crisis over BSE and foot-and-mouth.

The aim of this study was to compare elderly people with young adults in France for nutritional knowledge and concerns about meat in the aftermath of the rises with bovine spongiform encephalopathy and foot-and-mouth disease. Between March and April 2001, 99 healthy elderly people and 93 younger adults living in France were interviewed. Most of the elderly and young participants knew that meat contains proteins but were unaware of the role of proteins in body metabolism. The elderly knew that meat also contains iron and vitamins and is necessary for growth and for physical activity. However, elderly people had little awareness of the importance of consuming meat and were convinced that they had to reduce meat consumption because of their lower physical activity. On the other hand, they knew more than younger adults about animal diseases and were less worried about 'mad cow disease'. Thus, although the elderly people were confident about the safety of meat and recognised its nutritional properties, they did not consider it to be an essential food.