Can practice overcome age-related differences in the psychological refractory period effect?

Can dual-task practice remove age-related differences in the psychological refractory period (PRP) effect? To answer this question, younger and older individuals practiced 7 blocks of a PRP design, in which Task 1 (T1) required a vocal response to an auditory stimulus and Task 2 (T2) required a manual response to a visual stimulus (Experiment 1). The results showed that practice did not reduce, but rather increased, age-related differences in PRP interference. Using the trained individuals, the introduction of a less complex new T1 (Experiment 2) or a less complex new T2 (Experiment 3) with the task previously practiced reduced the PRP interference but only in older adults. The authors propose that older adults suffer from a large task-switch cost that is more sensitive to task complexity than to the amount of practice.     

How long does it take to find a cause? An online investigation of implicit causality in sentence production

Some interpersonal verbs show an implicit causality bias in favour of their subject or their object. Such a bias is generally seen in offline continuation tasks where participants are required to finish a fragment containing the verb (e.g., Peter annoyed Jane because ...). The implicit causality bias has been ascribed to the subject's focusing on the initiator of the event denoted by the verb. According to this "focusing theory" the implicit cause has a higher level of activation, at least after the connective "because" has been read. Recently, the focusing theory has been criticized by researchers who used a probe recognition or reading-time methodology. However no clear alternative has been proposed to explain the offline continuation data. In this paper, we report three experiments using an online continuation task, which showed that subjects took more time to imagine an ending when the fragment to be completed contained an anaphor that was incongruent with the verbal bias (e.g., Peter annoyed Jane because she ...). This result suggests that the offline continuation data could reflect the cognitive effort associated with finding a predicate with an agent incongruent with the implicit causality bias of a verb. In the discussion, we suggest that this effort could be related to the number of constraints that an incongruent clause must satisfy to be consistent with the causal structure of the discourse.     

Conceptual structures, representation of objects and object relations]

This article provides an overview of psychological studies of object concepts, highlighting the more recent re-conceptualizations, and the latest developments in research in this field. These developments have tended to focus on the notion of context, as well as on the notion of causal relations between features. Our theoretical analysis of this field is backed up by experimental illustrations. We complete with an examination of "category-specific impairments" studies, in the light of the evolution of concept theories.     

Duration of cats' (Felis catus) working memory for disappearing objects

This study explored the duration of cats' working memory for hidden objects. Twenty-four cats were equally divided into four groups, which differed according to the type of visual cues displayed on and/or around the hiding boxes. During eight sessions, the four groups of cats were trained to locate a desirable object hidden behind one of the four boxes placed in front of them. Then, the cats were tested with retention intervals of 0, 10, 30 and 60 s. Results revealed no significant differences between the groups during training or testing. In testing, the cats' accuracy to locate the hidden object rapidly declined between 0 and 30 s but remained higher than chance with delays of up to 60 s. The analysis of errors also indicated that the cats searched as a function of the proximity of the target box and were not subjected to intertrial proactive interference. This experiment reveals that the duration of cats' working memory for disappearing objects is limited and the visual cues displayed on and/or around the boxes do not help the cats to memorize a hiding position. In discussion, we explore why the duration of cats' working memory for disappearing objects rapidly declined and compare these finding with those from domestic dogs. The irrelevance of visual cues displayed on and around the hiding boxes on cats' retention capacity is also discussed.     

Assessing aggressive and depressed children's social relations with classmates and friends: a matter of perspective

This study examined aggressive, depressed, and aggressive–depressed childrenr's peer relations from the children's own and from their peers' perspective. Participants were 819 fourth through sixth graders (50.2% girls) who were assessed twice during the same school year. Measures included children's aggression and depression, self-rated and peer-rated social acceptance, number of reciprocal friends, and self-rated and friend-rated friendship quality. Analyses revealed different patterns, depending on the perspective considered. Depression but not aggression was significantly related to difficulties with the peer group and with dyadic friends from the children's own perspective, whereas the opposite pattern was found according to the peers' view. The co-occurrence of aggression and depression entailed significant difficulties with peers regardless of perspective. The implications of these results for the links between children's aggression and depression and their interpersonal relationships are discussed.     

Expectancy,controlled attention and automatic attention in prospective temporal judgments

Two experiments indicate that prospective judgments of a temporal target are influenced by nontarget temporal features. The basic task was to reproduce a target interval marked by visual events. In addition, visual or auditory interfering events were delivered. Experiment 1 showed that temporal reproduction is shorter when the interfering events occupy a late rather than early position during the target interval, a result explained in terms of expectancy, which causes attention shifts. This study also revealed that similar trends are obtained whether the interfering event involves a specific task or is irrelevant. Experiment 2 confirmed the position effect, and showed that the duration of an irrelevant cue can influence judgment of the target interval, as if it were also timed without appropriate control.     

Seating position and length of utterance of preschoolers with cerebral palsy

This study investigated the effects of semireclining and upright positions on production of utterances of increasing length by 10 physically typical preschoolers and 10 children with cerebral palsy. Sentences of 3, 7, and 10 syllables were imitated on one breath using the Respitrace to gather kinematic data of chest wall use. Analysis indicated that the reclining position led to 83% productions on one breath, while 95% could be produced on one breath in the upright position. During the longer 7- and 10-syllable utterances, children with cerebral palsy successfully imitated 48% and 18% of these utterances, while the control group performed 83% and 35% correctly for the 7- and 10-syllable tasks, respectively.     

Towards a theory of the integration of the Other in representation

In this article, the author tries to uncover the elements of a theoretical model which would take into account the psychic transformations necessary to facilitate the emergence of representation. Toward this end, he firstly relies on Jung's notion of the archetype and Freud's idea of hallucinatory wish fulfilment, which he reconsiders in the light of the writings of Fordham (de-integration and re-integration of the primary self), and of Jean Laplanche (primary seduction), and linking it to the model based on chaos theory as developed in physics. He thus concludes that under the influence of primary seduction, the archetype is able to become a veritable, strange psychic attractor, enabling the determining factor of the instinctual axis of the archetype to open up to the possibility of symbolization, a necessary underlying feature for the occurrence of subjectivity. He ends his argument with a brief clinical vignette which illustrates the effect of openness to the psychic unknown constituted by primary seduction in the transference.