Open Access
Normative data study of verbal fluency and naming tests in elderly people in Costa Rica
(Oxford University Press, 2024) Mora-Villalobos, Lara; Brown-Mata, Gloriana; Smith-Castro, Vanessa; Ramos Usuga, Daniela; Rivera, Diego; Arango Lasprilla, Juan Carlos; Ciencias de la Salud; Osasun Zientziak
Objective: to generate normative data for the Verbal Fluency Test (VFT) and the Boston Naming Test (BNT) in the Costa Rican population. Method The sample consisted of 563 healthy older people (aged 59-90 years). Polynomial multiple regression analyses were run to evaluate the effects of the age, sex, and education variables on VFT and BNT scores.Results The results showed a significant linear effect of education on the four-letter VF scores and an effect of sex on the letter P score, with females performing better than males. The explained variance ranged from 20.9% to 28.3%. A linear effect of age and education was also found for the four semantic VF scores, with scores decreasing with increasing age and lower education. The sex variable was significant for all semantic categories, with females performing better than males except in the animal category. The explained variance ranged from 21.7% to 30.9%. In the BNT, a linear effect of education was found, so that the more education, the better the score. In addition, a sex effect was also found, with males having higher scores than females. The predictors of the model explained 9.6% of the variance. Conclusions: this is the first study that generates normative data for the VF and BNT in the Costa Rican population over 59 years of age based on demographic variables. The use of these normative data will help clinicians in Costa Rica to better understand language functioning in the elderly, allowing for better classification and diagnosis in the future.
Open Access
Normative data of neuropsychological tests of attention and executive functions in Ecuadorian adult population
(Routledge, 2021) Rodríguez Lorenzana, Alberto; Ramos Usuga, Daniela; Adana Díaz, Lila; Mascialino, Guido; Rivera, Diego; Ciencias de la Salud; Osasun Zientziak
Objective: The purpose of this study was to generate normative data for five tests of attention and executive functions (M-WCST, Stroop test, TMT, BTA, and SDMT), in a group of 322 Ecuadorian adults from Quito between the ages of 18 and 85. Method: Multiple regression analyzes taking into account age, education, and gender were used to generate the normative data. Results: Age and education were significantly related to test performance such that scores decreased with age and improved as a function of education. An online calculator is provided to generate normative test scores. Conclusions: This is the first study that presents normative data for tests of executive functions and attention in an Ecuadorian adult population. This data will improve the clinical practice of neuropsychology and help to develop the field in the country.
Open Access
Normative data for verbal fluency and naming tests in Spanish-speaking adults in the United States
(SAGE, 2024-08-22) Olabarrieta Landa, Laiene; Rivera, Diego; Xia, Bridget; Moreno, Oswaldo; Ramos Usuga, Daniela; Morel Valdés, Gloria M.; López, Enrique; Rodríguez, Miriam J.; Carrión, Carmen I.; Lequerica, Anthony H.; Drago, Christin I.; García, Patricia; Rivera, Patricia M.; Perrin, Paul B.; Arango Lasprilla, Juan Carlos; Ciencias de la Salud; Osasun Zientziak
Background: The Rey-Osterrieth Complex Figure Test (ROCFT) and the Clock Drawing Test (CDT) are commonly used in clinical practice. The ROCFT measures constructional praxis, visual perception, and visuospatial learning and memory and the CDT assesses for visuospatial, constructional, and executive difficulties. Several neurological disorders are associated with visuospatial and visuoconstructional impairments, yet reliable normative data accounting for sociodemographic aspects of identity and acculturative variables are scarce for Hispanics living in the U.S. Objective: To generate normative data for the ROCF and CDT in a Spanish-speaking adult population living in the U.S. Methods: The sample consisted of 245 participants¿ cognitively normal adults, recruited from several states in the U.S. Each participant was administered the ROCFT and CDT as part of a larger cognitive battery. The ROCFT and CDT were normed using a Bayesian approach. Age, age2, education, sex, acculturation, and language competence, were included as predictors in the analyses. Results: ROCFT was associated with education and age, particularly as they interact with Spanish language competency, and time spent in the U.S. Education was significantly associated with recall abilities and a lower memory recall on the ROCFT. Age was found to vary depending on a person¿s bilingual abilities. Sex did not emerge as a predictor of performance, and it was not moderated by other variables. Conclusions: This is the first study to include acculturation and language proficiency variables in the creation of norms for the assessment of visuoconstruction abilities. This study will have a large impact on the practice of neuropsychology in the U.S.

Rivera, Diego

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