List of Figures

• Mean differences in reaction times to negative vs. neutral words for people who are not depressed, naturally depressed, and induced depressed on the lexical decision task
• Examples of feedback loops between affective and semantic nodes in a semantic network as suggested by Ingram (1984)
• Reaction times for lexical decision task, 150ms condition
• Reaction times for valence identification task, 150ms condition
• Reaction times for lexical decision and valence identification tasks, 50ms condition
• Reaction times for lexical decision and valence identification tasks, 100ms condition
• Reaction times for lexical decision and valence identification tasks, 150ms condition, as a function of BDI score
• Analog of a neuron used in computational neural network models
• An example neural network model. Highlighted nodes are ``activated''.
• A neural network model for investigating affective and semantic information processing
• Results of the simulated network's performance on the lexical decision task
• Results of the simulated network's performance on the valence identification task
• Hinton graphs of weights for a depressed and nondepressed network
• The network's reaction times to stimuli on the lexical decision task with all depressotypic stimuli included
• The network's reaction times when the difficult-to-learn depressotypic stimuli are removed
• Histograms of the depressed and nondepressed network's responses to a stimulus on which the depressed network is overtrained.
• Activation of positive, negative, and neutral features for a positive stimulus over time in a depressed network
• Exposing the ruminating network to a positive stimulus