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Statistical and perceptual updating: correlated impairments in right brain injury

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Abstract

It has been hypothesized that many of the cognitive impairments commonly seen after right brain damage (RBD) can be characterized as a failure to build or update mental models. We (Danckert et al. in Neglect as a disorder of representational updating. NOVA Open Access, New York, 2012a; Cereb Cortex 22:2745–2760, 2012b) were the first to directly assess the association between RBD and updating and found that RBD patients were unable to exploit a strongly biased play strategy in their opponent in the children’s game rock, paper, scissors. Given that this game required many other cognitive capacities (i.e., working memory, sustained attention, reward processing), RBD patients could have failed this task for various reasons other than a failure to update. To assess the generality of updating deficits after RBD, we had RBD, left brain-damaged (LBD) patients and healthy controls (HCs) describe line drawings that evolved gradually from one figure (e.g., rabbit) to another (e.g., duck) in addition to the RPS updating task. RBD patients took significantly longer to alter their perceptual report from the initial object to the final object than did LBD patients and HCs. Although both patient groups performed poorly on the RPS task, only the RBD patients showed a significant correlation between the two, very different, updating tasks. We suggest these data indicate a general deficiency in the ability to update mental representations following RBD.

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Acknowledgments

Natural Sciences and Engineering Research Council (http://www.nserc-crsng.gc.ca/index_eng.asp) of Canada Discovery (#261628-07), Canada Research Chair grants, Heart and Stroke Foundation of Ontario (http://www.heartandstroke.on.ca; #NA 6999 to J.D.) and Canadian Institutes of Health Research (http://www.cihr-irsc.gc.ca/e/193.html; #219972 operating grant to J.D. and B.A.). The above-mentioned funding agencies had no role in the study design, data collection and analysis, decision to publish or the preparation of the manuscript. We thank Elizabeth Kurusi for her assistance with patient recruitment and data collection and Linda Carson for her help in improvement the quality of two of the picture sets. We thank Nazanin Mohammadi Sepahvand for her help with data analysis. Finally, we would like to thank all of our participants for their time and effort in this experiment.

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Correspondence to Elisabeth Stöttinger.

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James Danckert and Britt Anderson have contributed equally to this work.

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Stöttinger, E., Filipowicz, A., Marandi, E. et al. Statistical and perceptual updating: correlated impairments in right brain injury. Exp Brain Res 232, 1971–1987 (2014). https://doi.org/10.1007/s00221-014-3887-z

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  • DOI: https://doi.org/10.1007/s00221-014-3887-z

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