Cox R M, Alexander G C
Department of Veterans Affairs Medical Center, Memphis, Tennessee, USA.
Ear Hear. 2001 Apr;22(2):151-60. doi: 10.1097/00003446-200104000-00008.
To cross-validate the psychometric characteristics of the Satisfaction with Amplification in Daily Life (SADL) questionnaire (Cox & Alexander, 1999), and to explore the SADL's construct validity.
Thirteen private practice Audiology clinics each distributed SADL questionnaires, by mail, to 20 adults who had recently obtained hearing aids. The completed questionnaires were returned to a central site and subject anonymity was assured. There were 196 usable responses.
Psychometric characteristics of the items were found to be very similar to those reported previously. Thus, the internal validity of the instrument was strongly supported. The assumption that the SADL quantifies satisfaction by assessing its components was evaluated by examining the relationship between SADL scores and scores on a traditional single-item satisfaction measure. A logical and statistically significant relationship was seen between the two measures, thereby supporting the construct validity of both types of data. For private-pay clients, satisfaction scores were very similar to the interim norms published by Cox and Alexander (1999). However, clients whose hearing aids were partly or fully purchased by insurance or benefits programs tended to be more satisfied than interim norms for third-party pay clients derived 5 yr ago. For most types of clients, there was a tendency toward more satisfaction in the Negative Features subscale than observed in our previous research.
Both construct and internal validity of the SADL questionnaire were supported by this research. The previously published interim norms appear to be mostly appropriate for private-pay clients, but might require adjustment in the Negative Features subscale. Further research is needed to explore the relationship between satisfaction and device purchase issues (third-party versus private pay).
对日常生活中放大效果满意度（SADL）问卷（考克斯和亚历山大，1999年）的心理测量特征进行交叉验证，并探讨SADL的结构效度。
13家私人执业听力诊所通过邮件向20名近期佩戴助听器的成年人发放了SADL问卷。填写完整的问卷被返还至一个中心地点，并确保了受试者的匿名性。共获得196份可用回复。
发现各项目的心理测量特征与之前报告的非常相似。因此，该工具的内部效度得到了有力支持。通过检查SADL得分与传统单项满意度测量得分之间的关系，对SADL通过评估其组成部分来量化满意度这一假设进行了评估。两种测量方法之间存在逻辑上且具有统计学意义的关系，从而支持了这两类数据的结构效度。对于自费客户，满意度得分与考克斯和亚历山大（1999年）公布的临时标准非常相似。然而，助听器部分或全部由保险或福利项目购买的客户往往比5年前得出的第三方付费客户的临时标准更满意。对于大多数类型的客户，与我们之前的研究相比，负面特征子量表的满意度有增加的趋势。
本研究支持了SADL问卷的结构效度和内部效度。之前公布的临时标准似乎大多适用于自费客户，但可能需要在负面特征子量表上进行调整。需要进一步研究来探讨满意度与设备购买问题（第三方付费与自费）之间的关系。
