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24 Individual Differences in CAMCOG-DS Performance in Children and Adults with Down's Syndrome and Relationship to Language and Reasoning
- Sandra V. Loosli, Katja Sandkühler, Elisabeth Wlasich, Catharina Prix, Olivia Wagemann, Georg Nübling, Adrian Danek, Johannes Levin
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- Journal:
- Journal of the International Neuropsychological Society / Volume 29 / Issue s1 / November 2023
- Published online by Cambridge University Press:
- 21 December 2023, pp. 632-633
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Objective:
The Cambridge Cognitive Examination for Down's Syndrome (CAMCOG-DS) was developed to assess cognitive functioning and dementia-related cognitive decline in people with Down's Syndrome (DS). It has been translated into different languages and is often used in international studies. Although adapted for people with intellectual disabilities (ID), many tasks involve verbal responses and instructions are presented orally. Therefore, the administration for people with severe language deficits can be challenging. The aim of this retrospective data analysis is to examine the influence of language ability and reasoning on CAMCOG-DS performance. Study 1 examined the relationship between CAMCOG-DS, picture naming, single word comprehension and reasoning in adults with DS. Study 2 replicates and broadens the findings in a sample of children and adults with DS.
Participants and Methods:Study 1 included 40 adults with DS between 18 and 51 years (M = 28.6, SD = 8.4). 25 had a mild and 15 a moderate ID. CAMCOG-DS, the short form of the Boston Naming test (BNT), a test for single word comprehension from the Werdenfelser Testbatterie (WTB) and the Colored Progressive Matrices (CPM) were administered. Study 2 included 38 participants between 8 and 59 years (23 children, M = 11.4; 15 adults; M = 31.3). 3 had a borderline, 23 a mild, and 12 a moderate ID. The same tasks as in Study 1 were applied, but the CPM was replaced by its successor, the Raven's 2.
Results:In Study 1, participants with mild ID performed better in all tasks than those with moderate ID (p < .05). Moderate relationships were found between CAMCOG-DS total score and the language tasks (r = .56 and r = .46), which remained significant when level of ID was controlled for. There was also a moderate relationship between CAMCOG-DS and reasoning (r = .46). Regression analysis showed that BNT performance predicted CAMCOG-DS performance (R2 = .31). In Study 2, those with mild ID, compared to those with moderate ID, performed better in all tasks (p < .05), however, regarding the CAMCOG-DS and language tasks, this effect was larger in adults than in children. Adults performed better than children in the CAMCOG-DS and BNT (p < .05), but not in single word comprehension or reasoning. As in Study 1, moderate to large correlations were revealed between CAMCOG-DS and language tasks and between CAMCOG-DS and reasoning (r > .52), remaining significant when age and ID level were controlled for. Regression analysis showed that both naming and reasoning but not single word comprehension or age predicted CAMCOG-DS performance (R2 = .69), however, performance was best predicted by naming (R2 = .65).
Conclusions:Our results suggest that language ability and reasoning relate to CAMCOG-DS performance, which is best predicted by BNT picture naming. This should be considered in CAMCOG-DS interpretation, as the capabilities of patients with lesser language ability might be underestimated. Future developments of dementia assessments for people with ID should include more nonverbal tasks.
Training of resistance to proactive interference and working memory in older adults: a randomized double-blind study
- Sandra V. Loosli, Rosalux Falquez, Josef M. Unterrainer, Cornelius Weiller, Benjamin Rahm, Christoph P. Kaller
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- Journal:
- International Psychogeriatrics / Volume 28 / Issue 3 / March 2016
- Published online by Cambridge University Press:
- 19 October 2015, pp. 453-467
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Background:
Working memory (WM) performance is often decreased in older adults. Despite the growing popularity of WM trainings, underlying mechanisms are still poorly understood. Resistance to proactive interference (PI) constitutes a candidate process that contributes to WM performance and might influence training or transfer effects. Here, we investigated whether PI resistance can be enhanced in older adults using a WM training with specifically increased PI-demands. Further, we investigated whether potential effects of such a training were stable and entailed any transfer on non-trained tasks.
Method:Healthy old adults (N = 25, 68.8 ± 5.5 years) trained with a recent-probes and an n-back task daily for two weeks. Two different training regimens (high vs. low PI-amount in the tasks) were applied as between-participants manipulation, to which participants were randomly assigned. Near transfer tasks included interference tasks; far transfer tasks assessed fluid intelligence (gF) or speed. Immediate transfer was assessed directly after training; a follow-up measurement was conducted after two months.
Results:Both groups similarly improved in PI resistance in both training tasks. Thus, PI susceptibility was generally reduced in the two training groups and there was no difference between WM training with high versus low PI demands. Further, there was no differential near or far transfer on non-trained tasks, neither immediately after the training nor in the follow-up.
Conclusion:PI-demands in WM training tasks do not seem critical for enhancing WM performance or PI resistance in older adults. Instead, improved resistance to PI appears to be an unspecific side-effect of a WM training.