This study examined the ability of reaction time (RT) and Event-Related Potentials (ERP) to detect malingered neurocognitive deficit (MNCD)in two new tasks compared to the TOMM (N = 47). Honest (HON), malingering (MAL), and traumatic brain injury (TBI) groups were compared on accuracy, RT and ERP measures. Overall, the Test of Memory Malingering (TOMM) accuracy was the most effective at classifying groups (hit rate = 100%). Several non-TOMM accuracy variables and RT variables reached hit rates in the range of 71%-88%. The TOMM RT variable had an unlimited time for participants to respond and was the most successful RT variable compared to the Old/New and Repetition Priming tasks that had a short time limit for participants to respond (approximately 1.5 seconds). The classic old/new effect RT pattern was evident for both the HON and TBI groups with significantly faster RTs for old items compared to new items. A logistic regression was employed to see if a RT and/or ERP variable added any unique prediction power in detecting malingering. The frontal-posterior ERP difference score had unique prediction power to detect malingering when classifying MAL vs. TBI (hit rate = 86%). In the Old/New task, ERP responses of HON produced greater activity in the frontal region compared to the posterior region. The opposite trend was found in TBI (posterior activity andgt; frontal) and MAL showed no significant difference.

Made available in DSpace on 2016-03-15T19:40:22Z (GMT). No. of bitstreams: 1 Maria Aparecida Bernardes Orlandi.pdf: 573960 bytes, checksum: 40c15cb8f5dd9faf220d051de6f44829 (MD5) Previous issue date: 2006-12-12 / Fundo Mackenzie de Pesquisa / The aim of this research was to identify in literature, possible variations and some relationship among aggression, neuroendocrine stress and neurocognitive deficit. A meta-analysis was conduct based on reviews, essays and thesis, on electronic database selected from 1996 to 2006, on MEDLINE, ERIC and CAPES. From a total of 371 selected researches, 41 were considered relevant, 330 were rejected because they did not satisfied the criteria of the analysis due to psychobiological context of aggression development in childhood related to the subject. The results suggested at least 7 different perspectives through childhood aggression could be analysed with favorable hypothesis, evidences and considerations related to neuroendocrine stress and neurocognitive deficit as co-occurrent with aggression in case of convergent situations of multifactorial vulnerability of the child. / O objetivo deste trabalho foi identificar na literatura, possível variação da agressividade e sua relação com o estresse neuroendócrino e déficit neurocognitivo na infância. Foi conduzida uma meta-análise baseada em artigos de revisão, dissertações e teses, selecionados nas fontes eletrônicas do MEDLINE, ERIC E CAPES, no período de 1996 a 2006. Do total de 371 artigos selecionados, 41 foram considerados relevantes, 330 foram descartados por não cumprirem os critérios para a análise devido ao contexto psicobiológico do desenvolvimento da agressividade na infância relacionado ao tema da pesquisa. Os resultados demonstraram pelo menos 7 diferentes perspectivas pelas quais a agressividade infantil pode ser analisada, com hipóteses, evidências e considerações favoráveis à relacionar o estresse neuroendócrino e déficit neurocognitivo como coocorrentes com a agressividade, em situações de convergência multifatorial e de vulnerabilidade da criança.