A third type of negative symptom is avolition, which is this decrease in motivation to complete certain goals, so someone might stay at home for long periods of time, without trying to reach out to friends or find work.

第三种阴性症状叫动机缺乏，表现为完成特定目标的动力下降；患者可能会长时间呆在家里，不去找朋友，也不会去找工作。