RESUMO
Two kinds of Pavlovian conditioned approach behavior are possible: approach of the CS (sign-tracking) and approach of the US (goal-tracking). We hypothesized that administration of AMP would increase sign-tracking and decrease goal-tracking. However, increasing doses of AMP (up to 2.0mg/kg) decreased measures of sign-tracking while simultaneously increasing measures of goal-tracking. Administration of AMP may shift responding from cues distant from the CS to cues closer to the CS.
Assuntos
Anfetamina/farmacologia , Estimulantes do Sistema Nervoso Central/farmacologia , Condicionamento Clássico/efeitos dos fármacos , Sinais (Psicologia) , Objetivos , Análise de Variância , Animais , Comportamento Animal , Condicionamento Clássico/classificação , Relação Dose-Resposta a Droga , Comportamento Alimentar/efeitos dos fármacos , Masculino , Ratos , Ratos Sprague-DawleyRESUMO
En este experimento se examinó el efecto de la duración del condicionamiento clásico sobre la respuesta operante en situación de interacción en 9 sujetos experimentales (divididos en 3 grupos), y sometidos a varias condiciones experimentales, para evaluar las diferencias en la respuesta operante entre los tres grupos, uno de control, en el que los condicionamientos demoran el tiempo necesario para el aprendizaje, un segundo grupo que tuvo un entrenamiento operante de larga duración y un entrenamiento clásico de corta duración y un tercer grupo que se caracterizó por un entrenamiento operante de corta duración y un clásico de larga duración. En el grupo control seobservó una mayor reducción del tiempo de ejecución de la respuesta, portanto no hubo supresión de la respuesta, lo que indica que a mayor entrenamientoclásico, más fuerte es el efecto de éste sobre la tasa de la respuestaoperante.
Assuntos
Condicionamento Psicológico/classificação , Condicionamento Clássico/classificaçãoRESUMO
Yamaguchi in 2006 solved for the first time a problem concerning a 1972 mathematical model of classical conditioning by Rescorla and Wagner. That derivation is not an isolated contribution. Here it is shown that the same line of derivation can be successfully applied to another experimental situation involving more stimuli.
Assuntos
Condicionamento Clássico/fisiologia , Modelos Estatísticos , Algoritmos , Condicionamento Clássico/classificação , Humanos , Reforço Psicológico , Reprodutibilidade dos TestesRESUMO
The coupled gas chromatography-proboscis extension assay technique was used on restrained worker bees to study responses to components of an extract of oilseed rape floral volatiles. Bees were stimulated with the effluent from the gas chromatograph after either paired or unpaired conditioning to the extract, or after a control treatment. Proboscis extension activity was elicited in six areas of the chromatogram. However, the number of bees responding in two of these areas were too low to be considered in the present study. One significant area of activity was associated with the major component, (E,E)-alpha-farnesene, whilst the others were associated with several minor components. Although all three groups of bees, irrespective of the treatments applied, showed some responses to the components eluting from the GC column, only bees subjected to paired conditioning consistently responded when re-tested to the mixture. In addition, paired conditioning increased the responsiveness of individuals in terms of the number of bees responding at least once to the effluent from the gas chromatograph. This work confirmed the occurrence of key compounds in floral volatile mixtures. Possible synergistic/inhibitory effects between components, relating to olfactory experience, are discussed.
