Momentary predictors of compliance in studies using the experience sampling method.

The influence of momentary experiences on compliance has not yet been studied extensively in diary methods such as the experience sampling method (ESM). This study investigated to what extent momentary experiences at the moment of responding (hereafter 'beep') can predict compliance in high frequency ESM protocols. Lagged-analyses were conducted using a pooled dataset of seven studies including 1,318 healthy volunteers and individuals with different mental health conditions. All studies used an ESM design of 10 beeps per day over 4 to 6 days. Overall compliance was 86% (to beeps where a subject was compliant at the previous beep). Results indicated that participants who reported higher positive affect overall were more compliant. Feeling disturbed by a beep, being outside the home, medication use, or longer inter-prompt interval decreased the chances of compliance to the subsequent beep. While participants with depression tended to be more compliant, chances to be compliant decreased in the evenings and over the course of the study days. When more beeps were missed consecutively, the chances to miss the subsequent beep increased. Findings suggest that disturbance of the beep, being outside the home, medication use, and inter-prompt interval might decrease the chances of compliance to the subsequent beep.