Ersche Karen D, Turton Abigail J, Croudace Tim, Stochl Jan
Department of Psychiatry, University of Cambridge, Cambridge, UK ; Behavioural and Clinical Neuroscience Institute, University of Cambridge, Cambridge, UK.
Addict Disord Their Treat. 2012 Dec;11(4):173-223. doi: 10.1097/ADT.0b013e31823da151.
The drug-related locus of control scale (DR-LOC) is a new instrument for assessing a person's belief of "being in control" in situations involving drug abuse. It consists of 16-item pairs presented in a forced-choice format, based on the conceptual model outlined by Rotter. The model characterizes the extent to which a person believes that the outcome of an event is under their personal control (internal locus of control) or the influence of external circumstances (external locus of control).
A total of 592 volunteers completed the DR-LOC and the Rotter's I-E scale. Approximately half of the respondents were enrolled in a drug treatment program for opiates, stimulants and/or alcohol dependence (n = 282), and the remainder (n = 310) had no history of drug dependence.
Factor analysis of DR-LOC items revealed 2 factors reflecting control beliefs regarding (i) the successful recovery from addiction, and (ii) decisions to use drugs. The extent to which a person attributes control in drug-related situations is significantly influenced by their personal or professional experiences with drug addiction. Drug-dependent individuals have a greater internal sense of control with regard to addiction recovery or drug-taking behaviors than health professionals and/or non-dependent control volunteers.
The DR-LOC has shown to effectively translate generalized expectancies of control into a measure of control expectancies for drug-related situations, making it more sensitive for drug-dependent individuals than Rotter's I-E scale. Further research is needed to demonstrate its performance at discriminating between heterogeneous clinical groups such as between treatment-seeking versus non-treatment-seeking drug users.
药物相关控制点量表（DR-LOC）是一种用于评估个体在药物滥用情境中“掌控”信念的新工具。它由16对项目组成，采用强制选择格式，基于罗特提出的概念模型。该模型描述了个体认为事件结果受其个人控制（内控点）或外部环境影响（外控点）的程度。
共有592名志愿者完成了DR-LOC和罗特的I-E量表。大约一半的受访者参加了针对阿片类药物、兴奋剂和/或酒精依赖的药物治疗项目（n = 282），其余（n = 310）没有药物依赖史。
对DR-LOC项目的因素分析揭示了2个因素，反映了关于（i）成瘾成功康复和（ii）药物使用决策的控制信念。个体在药物相关情境中归因控制的程度受到其个人或专业的成瘾经历的显著影响。与健康专业人员和/或非依赖对照志愿者相比，药物依赖个体在成瘾康复或服药行为方面具有更强的内控感。
DR-LOC已证明能有效地将一般化的控制期望转化为药物相关情境的控制期望测量指标，使其对药物依赖个体比罗特的I-E量表更敏感。需要进一步研究以证明其在区分不同临床群体（如寻求治疗与未寻求治疗的吸毒者）方面的表现。
