Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 13 de 13
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Anal Verbal Behav ; 39(1): 1-29, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37397135

RESUMO

Music is a unique form of verbal stimuli (Reynolds & Hayes, The Psychological Record, 67(3), 413-421, 2017) and the literature has indicated some success in using procedures involving the frame of coordination or stimulus equivalence to teach early piano skills to learners with and without autism spectrum disorder (ASD; Hill et al., Journal of Applied Behavior Analysis, 53(1), 188-208, 2020). However, these studies only targeted narrow skills rather than a complete repertoire. Also, whether such teaching procedure is effective for young children with ASD at different ages, with different needs, and with common accompanied diagnosis, is unknown. The current study (a) explored the possibility of applying relational frame theory (RFT; Hayes, Barnes-Holmes, & Roche, 2001) in piano program development that aims to teach a complete early piano repertoire, and (b) confirmed the effectiveness of an adjusted teaching procedure using the frame of coordination on teaching early piano skills to six young children on the autism spectrum. A multiple probe across participants design was used. After direct training of two relations (AC & AE), post-instructional tests were conducted on eight relations. The results showed that with remedial training, five out of six participants demonstrated mutual entailment, combinatorial entailment, and transformation of stimulus function in these relations. All participants could read and play the song on keyboard without extra training. The study provided practical guidance on applying the procedure to these young learners. Implications of RFT in piano curriculum development were also discussed. Supplementary Information: The online version contains supplementary material available at 10.1007/s40616-022-00175-8.

2.
Behav Brain Sci ; 45: e26, 2022 02 10.
Artigo em Inglês | MEDLINE | ID: mdl-35139966

RESUMO

Artificial intelligence (AI) shares many generalizability challenges with psychology. But the fields publish differently. AI publishes fast, through rapid preprint sharing and conference publications. Psychology publishes more slowly, but creates integrative reviews and meta-analyses. We discuss the complementary advantages of each strategy, and suggest that incorporating both types of strategies could lead to more generalizable research in both fields.


Assuntos
Inteligência Artificial , Editoração , Humanos
3.
Behav Neurosci ; 135(4): 487-497, 2021 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-34291969

RESUMO

The orbitofrontal cortex (OFC) has been implicated in goal-directed planning and model-based decision-making. One key prerequisite for model-based decision-making is learning the transition structure of the environment-the probabilities of transitioning from one environmental state to another. In this work, we investigated how the OFC might be involved in learning this transition structure, by using fMRI to assess OFC activity while humans experienced probabilistic cue-outcome transitions. We found that OFC activity was indeed correlated with behavioral measures of learning about transition structure. On a trial-by-trial basis, OFC activity was associated with subsequently increased expectation of the more probable outcome; that is, with subsequently more optimal cue-outcome predictions. Interestingly, this relationship was observed no matter what outcome occurred at the time of the OFC activity, and thus is inconsistent with an interpretation of the OFC activity as representing a "state prediction error" that would facilitate learning transitions via error-correcting mechanisms. Finally, OFC activity was related to more optimal predictions only for subsequent trials involving the same cue that was observed at the time of OFC activity-this relationship was not observed for subsequent trials involving a different cue. All together, these results indicate that the OFC is involved in updating or reinforcing a learned transition model on a trial-by-trial basis, specifically for the currently observed cue-outcome associations. (PsycInfo Database Record (c) 2021 APA, all rights reserved).


Assuntos
Aprendizagem , Córtex Pré-Frontal , Humanos , Motivação
4.
Behav Soc Issues ; 30(1): 692-711, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-38624797

RESUMO

Augmentals, as a type of verbal rule, have been used in political speeches either for establishing beneficial cultural values for the populace (Leigland, 2005) or for publicizing political points of view to exert control on public opinion through propaganda (Rakos, 1993). The current study conducted a functional content analysis on two presidential speeches about climate change and global warming regarding whether the United States should enter or exit the Paris Climate Agreement. The purposes of the study were to (a) examine the effects of two types of augmentals (reinforcer-establishing augmentals and punisher-establishing augmentals) on behavior change in the populace, (b) explore the effects of the types of relational frames that formed augmentals, and (c) provide guidance to the public on discriminating propaganda in media sources. The results showed different patterns in the use of augmentals in Donald Trump's speech, which attempted to persuade the populace to support exiting the agreement, compared to Barack Obama's speech, which attempted to persuade the populace to support entering the agreement. Several implications of the study are discussed.

5.
Can J Ophthalmol ; 54(1): 20-26, 2019 02.
Artigo em Inglês | MEDLINE | ID: mdl-30851770

RESUMO

Acute lymphoblastic leukemia (ALL) relapse implies a poor prognosis and demands emergency treatment. Leukemic infiltration of the anterior segment can masquerade as intraocular inflammation; a high index of suspicion for this complication is essential. We describe a case of ocular relapse in a 2-year-old male on maintenance therapy for ALL. A systematic review of all known cases of similar leukemic infiltration of the anterior segment of the eye in ALL was performed. A total of 106 patients in 43 reports described leukemic infiltration of the eye as an initial presentation of ALL or relapse. Ocular relapse may be the first visible manifestation of systemic disease, with concurrent disease in the CNS, bone marrow, or testes. Prognosis for ALL patients with ocular relapse is poor, with death after initial presentation reported as early as 16 days. Patients with a history of ALL presenting with any sign of ocular inflammation should be assessed for relapse and leukemic infiltration. As soon as a diagnosis of relapse has been confirmed, appropriate leukemia therapy should be initiated.


Assuntos
Segmento Anterior do Olho/diagnóstico por imagem , Infiltração Leucêmica/diagnóstico , Leucemia-Linfoma Linfoblástico de Células Precursoras/complicações , Uveíte/diagnóstico , Pré-Escolar , Humanos , Infiltração Leucêmica/complicações , Masculino , Microscopia Acústica , Leucemia-Linfoma Linfoblástico de Células Precursoras/diagnóstico , Prognóstico , Uveíte/etiologia
6.
Can J Ophthalmol ; 53(4): 349-353, 2018 08.
Artigo em Inglês | MEDLINE | ID: mdl-30119788

RESUMO

OBJECTIVE: To assess corticosteroid-sparing and inflammation control in patients with noninfectious scleritis treated with methotrexate. DESIGN: Retrospective review. PARTICIPANTS: Patients who received methotrexate treatment for noninfectious scleritis and who had 12 months of follow-up after treatment initiation were included in this review. METHODS: The clinical records of noninfectious scleritis patients presenting at the University of Ottawa Eye Institute between September 1, 2010 and December 31, 2014 treated with methotrexate were retrospectively reviewed. Seventeen patients (21 eyes) were included in the study. Main outcome included inflammation control and corticosteroid-sparing success. Secondary outcomes were reduction of immunosuppression load and best-corrected visual acuity. RESULTS: The proportion of eyes with corticosteroid-sparing success was 69.2% at 3 months and 92.3% at 12 months. The proportion of eyes that achieved inflammation control was 61.9% at 3 months and 90.5% at 12 months. The corticosteroid immunosuppression load at treatment start was 1.9 ± 2.07 and at 12 months was 0.48 ± 1.03 (p < 0.01). There was no statistically significant difference in best-corrected visual acuity. CONCLUSIONS: The treatment of noninfectious scleritis with methotrexate appears to be effective at both achieving steroid-sparing success and controlling inflammation during 12 months of therapy. Immunosuppression load decreased significantly over 12 months of therapy while best corrected visual acuity was stable.


Assuntos
Metotrexato/administração & dosagem , Esclera/patologia , Esclerite/tratamento farmacológico , Acuidade Visual , Relação Dose-Resposta a Droga , Feminino , Seguimentos , Humanos , Imunossupressores/administração & dosagem , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Esclerite/diagnóstico , Resultado do Tratamento
7.
Neuropsychologia ; 97: 72-82, 2017 03.
Artigo em Inglês | MEDLINE | ID: mdl-28132858

RESUMO

Several prominent theories posit that information about recent experiences lingers in the brain and organizes memories for current experiences, by forming a temporal context that is linked to those memories at encoding. According to these theories, if the thoughts preceding an experience X resemble the thoughts preceding an experience Y, then X and Y should show an elevated probability of being recalled together. We tested this prediction by using multi-voxel pattern analysis (MVPA) of fMRI data to measure neural evidence for lingering processing of preceding stimuli. As predicted, memories encoded with similar lingering thoughts about the category of preceding stimuli were more likely to be recalled together. Our results demonstrate that the "fading embers" of previous stimuli help to organize recall, confirming a key prediction of computational models of episodic memory.


Assuntos
Encéfalo/fisiologia , Imageamento por Ressonância Magnética/métodos , Memória Episódica , Rememoração Mental/fisiologia , Reconhecimento Automatizado de Padrão/métodos , Adolescente , Adulto , Mapeamento Encefálico , Feminino , Humanos , Masculino , Adulto Jovem
9.
J Neurosci ; 36(30): 7817-28, 2016 07 27.
Artigo em Inglês | MEDLINE | ID: mdl-27466328

RESUMO

UNLABELLED: The orbitofrontal cortex (OFC) has been implicated in both the representation of "state," in studies of reinforcement learning and decision making, and also in the representation of "schemas," in studies of episodic memory. Both of these cognitive constructs require a similar inference about the underlying situation or "latent cause" that generates our observations at any given time. The statistically optimal solution to this inference problem is to use Bayes' rule to compute a posterior probability distribution over latent causes. To test whether such a posterior probability distribution is represented in the OFC, we tasked human participants with inferring a probability distribution over four possible latent causes, based on their observations. Using fMRI pattern similarity analyses, we found that BOLD activity in the OFC is best explained as representing the (log-transformed) posterior distribution over latent causes. Furthermore, this pattern explained OFC activity better than other task-relevant alternatives, such as the most probable latent cause, the most recent observation, or the uncertainty over latent causes. SIGNIFICANCE STATEMENT: Our world is governed by hidden (latent) causes that we cannot observe, but which generate the observations we see. A range of high-level cognitive processes require inference of a probability distribution (or "belief distribution") over the possible latent causes that might be generating our current observations. This is true for reinforcement learning and decision making (where the latent cause comprises the true "state" of the task), and for episodic memory (where memories are believed to be organized by the inferred situation or "schema"). Using fMRI, we show that this belief distribution over latent causes is encoded in patterns of brain activity in the orbitofrontal cortex, an area that has been separately implicated in the representations of both states and schemas.


Assuntos
Potenciais de Ação/fisiologia , Cognição/fisiologia , Tomada de Decisões/fisiologia , Aprendizagem/fisiologia , Modelos Estatísticos , Córtex Pré-Frontal/fisiologia , Adolescente , Adulto , Causalidade , Simulação por Computador , Feminino , Humanos , Masculino , Modelos Neurológicos , Tempo de Reação/fisiologia , Adulto Jovem
11.
Ophthalmic Genet ; 37(3): 267-75, 2016 09.
Artigo em Inglês | MEDLINE | ID: mdl-26855058

RESUMO

PURPOSE: To discuss progress in research on choroideremia (CHM) and related retinopathies with special emphasis on gene therapy approaches. METHODS: Biomedical and clinical researchers from across the world as well as representatives of the social science research community were convened to the 2nd International Scientific Symposium for Choroideremia in Denver, Colorado in June 2014 to enhance our understanding of CHM and accelerate the translation of research to clinical application for the benefit of those affected by CHM. RESULTS: Pre-clinical research using cell and animal models continues to further our understanding in the pathogenesis of CHM as well as to demonstrate proof-of-concept for gene transfer strategies. With the advent of modern imaging technology, better outcome measures are being defined for upcoming clinical trials. Results from the first gene therapy trial in CHM show promise, with sustained visual improvement over 6 months post-treatment. Current and next-generation gene transfer approaches may make targeted vector delivery possible in the future for CHM and other inherited retinal diseases. CONCLUSIONS: While no accepted therapies exist for CHM, promising approaches using viral-vectored gene therapy and cell therapies are entering clinical trials for eye diseases, with gene therapy trials underway for CHM.


Assuntos
Coroideremia/terapia , Terapia Genética , Proteínas Adaptadoras de Transdução de Sinal/genética , Animais , Técnicas de Transferência de Genes , Vetores Genéticos , Humanos
12.
Can J Surg ; 57(3): 152-4, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-24869604

RESUMO

Evidence suggests that early exposure to surgical techniques, surgical knowledge and mentors strongly correlates with students' interest, knowledge and confidence in general surgery as a postgraduate career choice. Preclerkship exposure to surgery and implementation of a formal surgical curriculum is often restricted owing to attending surgeon time commitments and cost limitations. To promote earlier exposure to surgery, a group of senior medical students at McMaster University, Hamilton, Ont., developed and implemented a novel pilot program with a surgical lecture series and a surgical skills laboratory for preclerkship students. This commentary discusses the effectiveness of these initiatives.


Assuntos
Currículo , Educação de Graduação em Medicina/métodos , Cirurgia Geral/educação , Estudantes de Medicina , Ensino/métodos , Escolha da Profissão , Educação de Graduação em Medicina/organização & administração , Estudos de Viabilidade , Humanos , Mentores , Ontário , Projetos Piloto , Avaliação de Programas e Projetos de Saúde , Ensino/organização & administração
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...