Reaction Time of Healthy Older Adults Is Reduced While Walking Fast

Attentional requirements of walking at various speeds in older adults were examined. Twenty healthy older adults (69.9?±?2.77?years; 8 males) were asked to walk a distance of 10?m at a self-selected speed as well as 30% quicker and 30% slower. Concurrently, reaction time (RT) was evaluated by having participants respond as fast as possible to randomly presented auditory stimuli. Results reveal that an accelerated walking speed generated faster RT than slow and self-selected speeds, while no difference was found between the latter. Faster RTs during an accelerated walking speed may have been precipitated by the reduced equilibrium demands of the task.     

Age-related differences in timing with breaks

Two groups of participants differing in age were compared on a time production task during which timing was temporarily interrupted. Produced intervals lengthened with increasing delay before the break occurrence, and the effect was more pronounced in older than in younger adults. A reaction time response to the signal beginning the break period was required also. Older participants responded more slowly to this signal, but they benefited to a greater extent from a lengthening of the time preceding its presentation. These results suggest that performance of older participants is affected by attention sharing and preparation involved in timing with breaks.     

Adaptation and communicative design.

Two theoretical frameworks that examine the nature of adaptability and mutual influence in interaction, interpersonal deception theory and interaction adaptation theory, were used to derive hypotheses concerning patterns of interaction that occur across time in truthful and deceptive conversations. Two studies were conducted in which senders were either truthful or deceptive in their interactions with a partner who increased or decreased involvement during the latter half of the conversation. Results revealed that deceivers felt more anxious and were more concerned about self‐presentation than truthtellers prior to the interaction and displayed less initial involvement than truthtellers. Patterns of interaction were also moderated by deception. Deceivers increased involvement over time but also reciprocated increases or decreases in receiver involvement. However, deceivers were less responsive than truthtellers to changes in receiver behavior. Finally, partner involvement served as feedback to senders regarding their own performance.     

Validation de contenu de la version francophone du questionnaire Impact of Event Scale-Revised selon les critères du DSM-5

This study presented the results of a content validity conducted on the French version of the Impact of Event Scale-Revised (IES-R). A panel of three judges proceeded to the evaluation of the items of the IES-R taking into account that it would be completed by an elderly population. The panel evaluated each item's clarity and theoretical pertinence and classified them according to the diagnostic symptoms of the post-traumatic stress disorder (PTSD) of the DSM-5. Results showed that items of the IES-R are quite clear and pertinent theoretically speaking. Regarding the classification of the items describing the criteria for the diagnostic of PTSD, the experts concluded that many items were confusing. Improvement recommendations are presented.     

Psychic tonus, body schema and the parietal lobes: a multiple lesion case analysis

The psychic tonus model (Braun and colleagues, 1999, 2002, 2003, 2006) states that the left hemisphere is a "booster" of internal experience and behavior in general, and that the right hemisphere is a "dampener". Twenty-five patients with a "positive" extreme disturbance of body schema (somatoparaphrenia) and 37 patients with a "negative" disturbance of body schema (autotopagnosia or Gerstmann's syndrome), all following a unilateral parietal lesion, were found in the literature and were analyzed to test predictions from Braun's "psychic tonus" model. As expected, patients with a positive syndrome had a right hemisphere lesion significantly more frequently, and those with a negative syndrome had a left hemisphere lesion significantly more frequently. Thus the psychic tonus model of hemispheric specialization, previously supported with regard to psychomotor baseline, libido, talkativeness, memory, auditory and visual perceptual tonus, now incorporates the tonus of representation of the body (body schema) in the parietal lobes.     

The Immigration Experience of Iranian Baha’is in Saskatchewan: The Reconstruction of Their Existence, Faith, and Religious Experience

For approximately 150 years, Baha’is in Iran have been persecuted on the basis of their religion. Limitations to aspects of their lives have compelled them to face “civic death” or migrate to other countries. This qualitative pilot study explored the experience of forced migration and how religion attenuates the disruption to the lives of Iranian Baha’is. Adaptive strategies that four participants utilised to re-establish continuity were examined. Participants who were satisfied with their lives developed a way to allow parallel cultural traditions (Iranian and Canadian) to co-exist; those who could not integrate found it difficult to maintain a balance between these traditions.     

Evolutionary function of dreams: A test of the threat simulation theory in recurrent dreams

proposed an intriguing and detailed evolutionary theory of dreams which stipulates that the biological function of dreaming is to simulate threatening events and to rehearse threat avoidance behaviors. The goal of the present study was to test this theory using a sample of 212 recurrent dreams that was scored using a slightly expanded version of the DreamThreat rating scale. Six of the eight hypotheses tested were supported. Among the positive findings, 66% of the recurrent dream reports contained one or more threats, the threats tended to be dangerous and aimed at the dreamer, and when facing a threat, the dreamer tended to take defensive or evasive actions that were possible and reasonable. However, less than 15% of the recurrent dreams depicted realistic and probable situations critical for one's physical survival or reproductive success and the dreamer rarely succeeded in fleeing the threat despite important and appropriate efforts. The findings thus provide mixed support for the threat simulation theory.     

The issue of drugs and crime among a sample of incarcerated women

Based on a sample of incarcerated women in Quebec prisons in 1989, this study focuses on drug use and abuse and its relation to crime with a special concern for age of onset, nature of conviction, previous involvement in criminal activities, motivation, and other related variables. The emerging profile of these subjects is one of drug‐related problems rather than a deep involvement in criminality. Within this population of women prisoners a strong link between drugs and crime is still difficult to establish. In conclusion, it is suggested that future research rely more on qualitative analyses to gather a better understanding of the operating processes.     

Pitch characteristics of infant-directed speech affect infants’ ability to discriminate vowels

“Baby talk” or speech directed to prelinguistic infants is high in pitch and has exaggerated pitch contours (up/down patterns of pitch change) across languages and cultures. Using an acoustic model, we predicted that the large pitch contours of infant-directed speech should improve infants’ ability to discriminate vowels. On the other hand, the same model predicted that high pitch would not benefit, and might actually impair, infants’ ability to discriminate vowels. We then confirmed these predictions experimentally. We conclude that the exaggerated pitch contours of infant-directed speech aid infants’ acquisition of vowel categories but that the high pitch of infant-directed speech must serve another function, such as attracting infants’ attention or aiding emotional communication.