RESUMO
The results of several recent studies of human associative learning indicate that people will learn more rapidly about cues that have previously been experienced as predictive of events of significance, as compared with cues previously experienced as nonpredictive. Notably, however, these experiments have typically established this prior predictiveness by means of pretraining with multiple, simultaneously presented cues, some of which are more predictive than others. The present experiments instead investigated the influence of prior predictiveness on future learning when this predictiveness was established via pretraining with individual cues, each of which was the best available predictor of the outcome with which it was paired. Results indicate that, following this pretraining, human participants again show better learning about previously predictive cues than about previously nonpredictive cues.
Assuntos
Aprendizagem por Associação , Percepção de Cores , Sinais (Psicologia) , Memória de Curto Prazo , Aprendizagem por Probabilidade , Aprendizagem por Discriminação , Humanos , Transferência de ExperiênciaRESUMO
A 5-month-old boy with erythrokeratoderma variabilis is presented. The parents noted that the asymptomatic erythematous plaques changed over the course of hours to days. Topical therapy with retinoic acid proved ineffective. A brief review of the literature is presented.
Assuntos
Dermatopatias/tratamento farmacológico , Triancinolona/uso terapêutico , Administração Tópica , Aberrações Cromossômicas , Transtornos Cromossômicos , Cromossomos Humanos Par 1 , Humanos , Lactente , Masculino , Dermatopatias/diagnóstico , Dermatopatias/genética , Triancinolona/administração & dosagemAssuntos
Osso Nasal/anatomia & histologia , Nervo Óptico/diagnóstico por imagem , Órbita/diagnóstico por imagem , Osso Esfenoide/anatomia & histologia , Humanos , Doenças do Nervo Óptico/diagnóstico por imagem , Padrões de Referência , Reprodutibilidade dos Testes , Tomografia Computadorizada por Raios X/métodosRESUMO
The authors report a case of proliferating trichilemmal tumor and review the related literature. Although considered biologically benign, malignant proliferating trichilemmal tumor have been reported. The authors emphasize the importance of recognizing that the tumors can occur in individuals in their 20s and 30s, and that the tumors should be excised with a margin of normal tissue. Routine follow-up is recommended.