No description available.

No description available.

No description available.

The aim of this study was to investigate the development of release from proactive interference (RPI) and its relations with executive working memory functions. 101 primary school children (aged 6-12 years) and 20 young adults (aged 22-30 years) participated in the study. The main task, the Categorical Free Recall Test, comprised 12 items from 3 different categories (animals, fruits, clothes). The purpose of the main task was to examine both the development of the RPI pattern and the categorization ability during childhood. As our results showed, the categorization ability and the RPI pattern were already present in the 1st graders. Although overall memory span increased with age, there was no significant development for the categorization and the RPI effect. For the additional tasks, the Word Span Test (WST, to measure the phonological WM capacity), the Wisconsin Card Sorting Test (WCST, to measure both the categorization ability and executive WM functions), and the Listening Span Test (LST, to examine executive and complex WM functions), the results indicated that children also improved with age. Overall memory capacity in the main task was best predicted by the WST / however, memory of serial position was best predicted by the LST. These findings are in accordance with the view that the WST measures the phonological working memory span, whereas the LST measures complex working memory and executive functions. The comparisons between the adult and the child sample revealed that except for the RPI pattern adults were better on all tasks than the children. The lack of a consistent RPI pattern for the adults may be due to the relatively short stimulus list.

Proaktiv interferens innebär att gammal irrelevant information i arbetsminnet förblir aktiverat och stör framplockning av ny relevant information. Tidigare forskning har demonstrerat åldersrelaterade skillnader mellan yngre och äldre vuxna på så sätt att äldre vuxna är mer utsatta för den störande effekten av proaktiv interferens. Men hur påverkas barn av proaktiv interferens? Denna studie syftar till att undersöka åldersrelaterade skillnader samt könsskillnader i proaktiv interferens hos barn i skolålder med förväntningen att yngre barn likt äldre vuxna är mer känsliga för influensen av proaktiv interferens. Ett 2-back-lure arbetsminnestest användes för att undersöka influensen av proaktiv interferens hos totalt 69 deltagare i åldrarna 8–11 år. Ett relativt interferensmått beräknades och användes för hypotesprövningen. Resultaten ifrån envägs variansanalys visar inga signifikanta skillnader mellan åldersgrupperna för både reaktionstid, F (2,53) = 2.360, p = .105, samt accuracy, F(2,53) = .409, p = .667. En envägs variansanalys visade dock på signifikanta könsskillnader för reaktionstid, F (2,53) = 3.927, p = .026, men inte för accuracy, F(2,53) = 1.131, p = .331. Resultaten indikerar att det inte finns åldersrelaterade skillnader mellan dessa åldersgrupper, men att flickor kan uppleva mer interferens än pojkar. / Proactive interference means that old irrelevant information in working memory remains active and inhibits recall of new relevant information. Previous research has demonstrated age-related differences between younger and older adults in such a way that older adults are more susceptible to the inhibiting effect of proactive interference. But how does proactive interference affect children? The purpose of this study was to investigate age-related differences as well as gender differences in school-aged children with the expectation that younger children like the older adults may be more susceptible to the influence of proactive interference. A 2-back-lure working memory test was used to investigate the influence of proactive interference among a total of 69 participants aged 8-11 years. The results indicate insignificant age-related differences with regards to reaction time, F(2,53) = 2.360, p = .105, as well as accuracy, F(2,53) = .409, p = .667. A one way ANOVA did however indicate significant gender-differences for reaction time, F(2,53) = 3.927, p = .026, but not for accuracy, F(2,53) = 1.131, p = .331. The results indicate that there are no age-related differences between these age groups but that girls may experience more interference than boys.

Le clivage est un mécanisme de défense dans lequel les représentations positives et négatives de soi-même et d’autrui sont séparées afin d’éviter de ressentir l’anxiété. Les stresseurs interpersonnels provoqueraient des comportements impulsifs chez les individus ayant une propension au clivage élevée. Ceci dit, les processus cognitifs associés à la propension au clivage sont inconnus. La capacité de résistance à l’interférence proactive est la capacité de résister à l’intrusion en mémoire de travail de pensées impertinentes pour la tâche en cours. Ainsi, cette capacité pourrait jouer un rôle important dans la gestion de représentations et être diminuée par les stresseurs de nature interpersonnelle. La présente étude avait pour but de vérifier l’hypothèse voulant que la résistance à l’interférence proactive diminue dans une condition d’exclusion sociale et que cet effet soit augmenté par la propension au clivage. L’échantillon comprenait 131 individus provenant d’une population non-clinique. D’abord, ils ont complété un questionnaire mesurant la propension au clivage. Ensuite, ils ont été assignés aléatoirement à une condition soit d’exclusion sociale, soit d’inclusion sociale. Finalement, ils ont effectué une tâche de résistance à l’interférence proactive. Dans la condition d’exclusion, les participants commettent davantage d’erreurs sur les cibles négatives non récentes que sur les cibles négatives récentes à la tâche de résistance à l’interférence proactive. Aucune interaction n’a été obtenue entre la propension au clivage et les conditions sociales. Conséquemment, les processus cognitifs associés à la propension au clivage demeurent inconnus, mais des pistes d’explication sont explorées du point de vue méthodologique pour les recherches futures. / Splitting refers to a defense mechanism by which the positively and negatively charged representations of self and others are separated in order to protect oneself from several anxiety. Interpersonal stresses play a major role in triggering impulsive behaviors among individuals with a high splitting usage. However, the cognitive processes associated with the usage of splitting are unknown. Resistance to proactive interference is the ability to resist memory intrusions from irrelevant previously learned information. This cognitive ability might, thus, play an important role in regulating representations and be decreased by interpersonal stress. It is hypothesized that the resistance to proactive interference would decrease during social exclusion and this effect would be function of splitting use frequency. The sample consisted of 131 nonclinical individuals from student and general population. They completed a self-report splitting questionnaire. Then, they were randomly assigned to rejection or inclusion conditions on an interpersonal task. Finally, they performed a resistance to proactive interference task. In the rejection condition, the error rate on negative probes trials was higher than recent negative probes trials. Splitting usage did not interact with social condition in predicting the error rate in the resistance to proactive interference task. Consequently, the cognitive processes associated to splitting usage remain unknown but explanations are explored in a methodological view for future researches.