O Iowa Gambling Task.
Uma revisão crítica
Palavras-chave:
Psicologia; Metodologia, instrumentação e equipamento em psicologia, Iowa Gambling Task, Tomada de decisão, Feedback, Recompensas, PuniçõesResumo
O Iowa Gambling Task (IGT) é uma tarefa amplamente utilizada na avaliação da capacidade de tomada de decisão. Neste artigo, procede-se à revisão da literatura, comparando-se as versões do IGT, as diferentes medidas de avaliação do desempenho e as alterações introduzidas nos procedimentos, nomeadamente no feedback, na aleatorização espacial dos baralhos, no número de ensaios e de cartas por baralho, nas instruções, no reforço/remuneração e na manipulação das recompensas e punições. Desta análise, conclui-se que as diversas versões da tarefa, as alterações nos procedimentos de aplicação e as diferentes medidas utilizadas para a avaliar causam impacto no desempenho, prejudicando a comparação entre estudos e as generalizações dos resultados. Finalmente, apresentam-se sugestões para uma maior adequação de procedimentos.
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