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11.
It is assumed that spatial memory contributes crucially to animal cognition since animals’ habitats entail a large number of dispersed and unpredictable food sources. Spatial memory has been investigated under controlled conditions, with different species showing and different conditions leading to varying performance levels. However, the number of food sources investigated is very low compared to what exists under natural conditions, where food resources are so abundant that it is difficult to precisely identify what is available. By using a detailed botanical map containing over 12,499 trees known to be used by the Taï chimpanzees, we created virtual maps of all productive fruit trees to simulate potential strategies used by wild chimpanzees to reach resources without spatial memory. First, we simulated different assumptions concerning the chimpanzees’ preference for a particular tree species, and, second, we varied the detection field to control for the possible use of smell to detect fruiting trees. For all these assumptions, we compared simulated distance travelled, frequencies of trees visited, and revisit rates with what we actually observed in wild chimpanzees. Our results show that chimpanzees visit rare tree species more frequently, travel shorter distances to reach them, and revisit the same trees more often than if they had no spatial memory. In addition, we demonstrate that chimpanzees travel longer distances to reach resources where they will eat for longer periods of time, and revisit resources more frequently where they ate for a long period of time during their first visit. Therefore, this study shows that forest chimpanzees possess a precise spatial memory which allows them to remember the location of numerous resources and use this information to select the most attractive resources. 相似文献
12.
Judith Charpentier Klara Kovarski Sylvie Roux Emmanuelle Houy-Durand Agathe Saby Frédérique Bonnet-Brilhault Marianne Latinus Marie Gomot 《Cognitive, affective & behavioral neuroscience》2018,18(4):748-763
Voices transmit social signals through speech and/or prosody. Emotional prosody conveys key information about the emotional state of a speaker and is thus a crucial cue that one has to detect in order to develop efficient social communication. Previous studies in adults reported different brain responses to emotional than to neutral prosodic deviancy. The aim of this study was to characterize such specific emotional deviancy effects in school-age children. The mismatch negativity (MMN) and P3a evoked potentials, reflecting automatic change detection and automatic attention orienting, respectively, were obtained for neutral and emotional angry deviants in both school-age children (n = 26) and adults (n = 14). Shorter latencies were found for emotional than for neutral preattentional responses in both groups. However, whereas this effect was observed on the MMN in adults, it appeared in an early discriminative negativity preceding the MMN in children. A smaller P3a amplitude was observed for the emotional than for the neutral deviants at all ages. Overall, the brain responses involved in specific emotional change processing are already present during childhood, but responses have not yet reached an adult pattern. We suggest that these processing differences might contribute to the known improvement of emotional prosody perception between childhood and adulthood. 相似文献
13.
Aymen Ben Abbes Emmanuelle Gavault Thierry Ripoll 《Advances in cognitive psychology / University of Finance and Management in Warsaw》2014,10(3):90-103
We conducted a series of experiments to explore how the spatial configuration of
objects influences the selection and the processing of these objects in a visual
short-term memory task. We designed a new experiment in which participants had
to memorize 4 targets presented among 4 distractors. Targets were cued during
the presentation of distractor objects. Their locations varied according to 4
spatial configurations. From the first to the last configuration, the distance
between targets’ locations was progressively increased. The results revealed a
high capacity to select and memorize targets embedded among distractors even
when targets were extremely distant from each other. This capacity is discussed
in relation to the unitary conception of attention, models of split attention,
and the competitive interaction model. Finally, we propose that the spatial
dispersion of objects has different effects on attentional allocation and
processing stages. Thus, when targets are extremely distant from each other,
attentional allocation becomes more difficult while processing becomes easier.
This finding implicates that these 2 aspects of attention need to be more
clearly distinguished in future research. 相似文献
14.
Nina Howe Emmanuelle Adrien Sandra Della Porta Stephanie Peccia Holly Recchia Helena P. Osana Hildy Ross 《Infant and child development》2016,25(2):137-157
Sibling‐directed teaching of mathematical topics during naturalistic home interactions was investigated in 39 middle‐class sibling dyads at two time points. At time 1 (T1), siblings were 2 and 4 years of age, and at time 2 (T2), siblings were 4 and 6 years of age. Intentional sequences of sibling‐directed mathematical teaching were coded for (i) topics (e.g., number), (ii) contexts (e.g., play with materials/toys), and (iii) type of knowledge (conceptual and procedural). Siblings engaged in teaching number, geometry, and measurement at T1 and demonstrated preliminary evidence of teaching of grouping, relations, and operations at T2. Regarding context, at T1, mathematical teaching occurred most frequently during play with materials/toys, while at T2, games with rules were prominent. Teaching of conceptual or procedural knowledge varied over time and by topic and context. Findings are discussed in light of recent work on understanding children's mathematical knowledge as it develops in the informal family context. Copyright © 2015 John Wiley & Sons, Ltd. 相似文献
15.
Emmanuelle Kristensen Anne Guerin-Dugué Bertrand Rivet 《Behavior research methods》2017,49(6):2255-2274
The usual event-related potential (ERP) estimation is the average across epochs time-locked on stimuli of interest. These stimuli are repeated several times to improve the signal-to-noise ratio (SNR) and only one evoked potential is estimated inside the temporal window of interest. Consequently, the average estimation does not take into account other neural responses within the same epoch that are due to short inter stimuli intervals. These adjacent neural responses may overlap and distort the evoked potential of interest. This overlapping process is a significant issue for the eye fixation-related potential (EFRP) technique in which the epochs are time-locked on the ocular fixations. The inter fixation intervals are not experimentally controlled and can be shorter than the neural response’s latency. To begin, the Tikhonov regularization, applied to the classical average estimation, was introduced to improve the SNR for a given number of trials. The generalized cross validation was chosen to obtain the optimal value of the ridge parameter. Then, to deal with the issue of overlapping, the general linear model (GLM), was used to extract all neural responses inside an epoch. Finally, the regularization was also applied to it. The models (the classical average and the GLM with and without regularization) were compared on both simulated data and real datasets from a visual scene exploration in co-registration with an eye-tracker, and from a P300 Speller experiment. The regularization was found to improve the estimation by average for a given number of trials. The GLM was more robust and efficient, its efficiency actually reinforced by the regularization. 相似文献
16.
Brodeur MB Debruille JB Renoult L Prévost M Dionne-Dostie E Buchy L Lepage M 《Brain and cognition》2011,76(1):115-122
The present study was carried out to examine how the event-related potentials to fragmentation predict recognition success. Stimuli were abstract meaningless figures that were either complete or fragmented to various extents but still recoverable. Stimuli were first encoded as part of a symmetry discrimination task. In a subsequent recognition phase, encoded stimuli were presented complete along with never presented stimuli and participants performed an old/new discrimination task. Fragmentation stimuli elicited more negative ERPs than complete figures over the frontal, central and parietal areas between 180 and 260 ms, and over the occipito-temporal areas between 220 and 340 ms. Only this latter effect was modulated as a function of whether stimuli were recognized or not during the recognition phase of the memory test. More specifically, the effect occurred for stimuli that were later forgotten and was absent for stimuli that were later recognized. This ERP to fragmentation, the occipito-temporal N(frag), possibly reflects the brain response to encoding difficulty, and is thus predictive of recognition performance. 相似文献
17.
Career exploration in adolescents: The role of anxiety, attachment, and parenting style 总被引:1,自引:0,他引:1
Emmanuelle Vignoli Sandrine Croity-Belz Anne de Fillipis 《Journal of Vocational Behavior》2005,67(2):153-168
The aim of the study was to examine the role of parent-adolescent attachment, adolescent anxiety and parenting style in the career exploration process and in career satisfaction. Three kinds of anxiety were considered: general trait anxiety, fear of failing in one’s career and fear of disappointing one’s parents. The participants were 283 French high school students on the threshold of one of the most important school transitions. The results varied by gender. For girls, general anxiety and neglectful style were negatively related to career exploration; secure attachment and fear of failing were positively related to it. For boys, fear of disappointing parents was positively related to career exploration. Attachment to parents, authoritative style, general anxiety, and fear of failing were related to some career exploration satisfaction scores, though differently for boys and girls. The differences between boys and girls in the roles played by anxiety, attachment and parenting style are discussed. 相似文献
18.
19.
Maria D. Morera Emmanuelle Dupont Jacques‐Philippe Leyens Michel Dsert 《European journal of social psychology》2004,34(4):437-457
In previous research, targets' sensitivity to prejudice cues has been assessed on the basis of two types of information. Prototypical information renders the situation representative of discrimination encountered by the ingroup. Diagnostic information is a direct indication that prejudice possibly is operating in a given situation. We hypothesize that, when available and processed at the onset of an evaluation situation, prototypical information shapes targets' understanding of subsequent diagnostic information. In three experiments, participants were informed that they were to be evaluated by relevant outgroup members either before or after having performed a task. Diagnostic information was always provided at the same moment, i.e. after the task was completed, and was either uncertain (prejudice may bias the evaluation) or certain (prejudice certainly biases the evaluation). In the before condition, attributions to prejudice were as elevated whatever participants were told that prejudice might, or certainly did, bias the evaluation. Furthermore, in the case of uncertain diagnostic information, those who were readily informed of the evaluator(s)' identity attributed their failure to prejudice to a greater extent than those who received this information later. Copyright © 2004 John Wiley & Sons, Ltd. 相似文献
20.
Claudette Fortin Emmanuelle Couture 《Revue canadienne de psychologie expérimentale》2002,56(2):120-127
We showed previously that when time intervals around two seconds (s) are reproduced concurrently with a memory task, intervals are positively related to duration of memory processing. However, some data in research on timing as well as in memory research suggest that 2 s might be a critical duration beyond which different mechanisms or structures would support performance. This implies that the interference observed between memory processing and 2-s productions could be specific to these durations, and would not be obtained with longer durations. In this experiment, intervals ranging from 1.85 to 6.45 s were reproduced by participants, who were searching simultaneously for a memory probe. At all durations, reproductions were positively related to memory set size. These findings have implications with regards to previous research indicating a discontinuity around 2-3 s in time perception. They suggest in particular that the role of memory is similar in reproduction of durations around 2 s and of longer durations. 相似文献