Introduction to the Special Issue on Advances in the Methodology of Ambulatory Assessment

Increasingly, mobile technologies are used to gather diary data in basic research and clinical studies. This article considers issues relevant to the integration of electronic diary (ED) methods in clinical assessment. EDs can be used to gather rich information regarding clients' day-to-day experiences, aiding diagnosis, treatment planning, treatment implementation, and treatment evaluation. The authors review the benefits of using diary methods in addition to retrospective assessments, and they review studies assessing whether EDs yield higher quality data than conventional, less expensive paper-pencil diaries. Practical considerations--including what platforms can be used to implement EDs, what features they should have, and considerations in designing diary protocols for sampling different types of clinical phenomena--are described. The authors briefly illustrate with examples some ways in which ED data could be summarized for clinical use. Finally, the authors consider barriers to clinical adoption of EDs. EDs are likely to become increasingly popular tools in routine clinical assessment as clinicians become more familiar with the logic of diary designs; as software packages evolve to meet the needs of clinicians; and as mobile technologies become ubiquitous, robust, and inexpensive. ((c) 2007 APA, all rights reserved).

Abstract. In this article, the authors provide an empirical analysis of the obtrusiveness of and participants' compliance with a relatively new psychological ambulatory assessment method, called the electronically activated recorder or EAR. The EAR is a modified portable audio-recorder that periodically records snippets of ambient sounds from participants' daily environments. In tracking moment-to-moment ambient sounds, the EAR yields an acoustic log of a person's day as it unfolds. As a naturalistic observation sampling method, it provides an observer's account of daily life and is optimized for the assessment of audible aspects of participants' naturally-occurring social behaviors and interactions. Measures of self-reported and behaviorally-assessed EAR obtrusiveness and compliance were analyzed in two samples. After an initial 2-h period of relative obtrusiveness, participants habituated to wearing the EAR and perceived it as fairly unobtrusive both in a short-term (2 days, N = 96) and a longer-term (10-11 days, N = 11) monitoring. Compliance with the method was high both during the short-term and longer-term monitoring. Somewhat reduced compliance was identified over the weekend; this effect appears to be specific to student populations. Important privacy and data confidentiality considerations around the EAR method are discussed.