ABSTRACT
Alzheimer's disease is a neurodegenerative disorder that is characterized by progressive cognitive decline, particularly in declarative memory, and the presence of ß-amyloid plaques, neurofibrillary tangles, and cortical atrophy (especially in the temporal lobe). Unlike the relationship between the temporal cortex and declarative memory, nondeclarative memories (e.g., motor, fear, and other emotion-based memories) involve distinct neural structures. The present review investigates nondeclarative associative learning ability in Alzheimer's disease. We discuss eyeblink conditioning, fear conditioning, and other emotion-based learning and present the functions and brain areas that are involved in each type of learning. Evidence suggests that nondeclarative learning is also affected by Alzheimer's disease, although some forms of learning may be relatively preserved. Details about each nondeclarative associative learning process and the implications of these findings are presented.
Subject(s)
Alzheimer Disease , Humans , Conditioning, Classical , Learning , Fear , EmotionsABSTRACT
BACKGROUND: The development of a psychometric measure for assessing democratic culture in organizations is described. METHODS: Two studies were conducted. A literature review of studies reporting democratic culture instruments was undertaken. Six databases were used within the timeframe of between 2015 and 2020. Four specialists rated the derived items on clarity, relevance, and translation via the content validity coefficient (CVC). An exploratory factor analysis (EFA) was performed with 225 individuals and the internal consistency was evaluated by Cronbach's alpha. RESULTS: A set of 2,049 articles were obtained in the literature review. The content validity coefficient allowed us to gather 96 items. The EFA achieved a final multidimensional solution formed of 58 items in 6 correlated factors: Citizen Participation, Tolerance and Openness, Organizational Citizenship, Traditionalist Dogmatism, Individualism and Rebellion, and Punitive Authoritarianism. Cronbach's alpha ranged from .59 to .78. CONCLUSION: This article presented several procedures used to develop a new measure of democratic culture in organizations.
Este trabalho visa o desenvolvimento de uma medida psicométrica para avaliação da cultura democrática em organizações. MÉTODOS: Dois estudos foram realizados. No primeiro, uma revisão de literatura com estudos que usaram instrumentos de cultura democrática foi realizada. Seis bases de dados foram usadas entre 2015 e 2020. Quatro especialistas avaliaram os itens derivados quanto à clareza, relevância e tradução por meio do Coeficiente de Validade de Conteúdo (CVC). Uma Análise Fatorial Exploratória (AFE) foi realizada com 225 indivíduos e a consistência interna foi avaliada pelo alfa de Cronbach. RESULTADOS: 2.049 artigos foram obtidos na revisão. O CVC nos permitiu reunir 96 itens. A EFA alcançou uma solução multidimensional formada por 58 itens em seis fatores correlacionados de Participação Cidadã, Tolerância e Abertura, Cidadania Organizacional, Dogmatismo Tradicionalista, Individualismo e Rebelião, Autoritarismo Punitivo. O alfa de Cronbach variou de 0,59 a 0,78. CONCLUSÃO: Este artigo apresentou procedimentos usados para desenvolver uma nova medida de cultura democrática.
OBJETIVO: El objetivo de este trabajo fue describir el desarrollo de una medida psicométrica para la evaluación de la cultura democrática en organizaciones. MÉTODOS: Se realizaron dos estudios: una revisión de la literatura de estudios que informan sobre instrumentos de cultura democrática, en seis bases de datos, en el período de 2015 a 2020, en la cual cuatro especialistas calificaron los elementos derivados según su claridad, relevancia y traducción con base en el coeficiente de validez del contenido (CVC); y un Análisis Factorial Exploratorio (AFE) con 225 individuos en que se evaluó la consistencia interna utilizando el Alfa de Cronbach. RESULTADOS: Se obtuvo un conjunto de 2 049 artículos en la revisión de la literatura; el CVC permitió reunir 96 elementos; la EFA logró una solución multidimensional conformada por 58 ítems en 6 factores correlacionados de Participación Ciudadana, Tolerancia y Apertura, Ciudadanía Organizacional, Dogmatismo Tradicionalista, Individualismo y Rebelión y Autoritarismo Punitivo; y el Alfa de Cronbach osciló entre 0,59 y 0,78. CONCLUSIÓN: Este artículo presentó procedimientos utilizados para desarrollar una nueva medida de cultura democrática.
ABSTRACT
Stroop-like and stop-signal tasks are commonly used to evaluate "inhibition", a multifaceted concept fundamental to better understanding of executive functions. Both tasks demand inhibitory processes for their execution; the first requires inhibition of an irrelevant attribute, while the second involves the inhibition of a prepotent motor response. Impulsivity and decision-making represent two other factors that could be associated to executive control and to inhibitory dyscontrol. In this study we developed a behavioral protocol combining the Stroop-matching (a variation of the classic Stroop task) and the stop-signal tasks to investigate possible interactions between the inhibitory mechanisms involved in both tasks. Moreover, we searched for associations between behavioral performance of healthy participants, and self-reported impulsivity and decision-making processes assessed by the BIS-11 scale and IGT, respectively. Our results showed that the primary-task reaction time in the Stroop-matching task influenced the ability to inhibit motor responses in the stop-signal task. Moreover, impulsiveness scores (but not decision-making) were associated to behavioral performance. Importantly, motor and attentional impulsiveness correlated differently to performance depending on the existence of stop-signal trials in the task. Our protocol revealed promising findings concerning the interaction between different inhibitory processes and their association with impulsivity levels.
