1. 习惯性：机体方面的因素有:性别年龄、遗传异常、病理情况、心理因素(安慰剂、placebo)以及机体对药物反应的变化:致敏反应(sensitization),快速耐受性(tachyphylaxis)、耐受性(tolerance)、习惯性(habituation)、成瘾性(addiction)、依赖性(dependence).

2. 适应：发现在适应(habituation)和消退(extinction)阶段,两组之间没有显著差异;在条件反射的建立(acquisition)阶段,同难闻气味建立的条件反射引起正常人的杏仁核和海马的信号强度降低,而引起社交恐怖症患者的杏仁核和海马的信号强度增加,

3. 习惯法：(视觉)偏好法--preferential method | 习惯法--habituation | 视觉悬崖--visual cliff

1. a general accommodation to unchanging environmental conditions

2. being abnormally tolerant to and dependent on something that is psychologically or physically habit-forming (especially alcohol or narcotic drugs)

    Synonym: addictiondependencedependancedependency