<qa>  What is the main component of the deficit syndrome?A key component of the deficit syndrome is a lack of motivation to pursue goals in educational, occupational, social, and recreational domains. This proposal rests on the hypothesis that a core feature of the amotivational component of the deficit state is a deficiency in reward processing. This deficiency in turn fails to provide sufficient stimulation of conditioning reinforcement of approach behavior serving the pursuit of rewards. In most patients the impairment is not so severe that the patients fail to pursue the primary rewards of food and drink. But motivation to pursue more complex secondary reinforcers such as economic success, stable loving relationships, avocations, intellectual fulfillment and other uniquely human goals are strikingly lacking in deficit syndrome patients. 