Measuring Intent to Aid of Lay Responders: Survey Development and Validation

Increasing lay responder cardiopulmonary resuscitation and automated external defibrillator use during sudden cardiac arrest depends on an individual's choice. Investigators designed and piloted an instrument to measure the affective domain of helping behaviors by applying the theory of planned behavior (TPB) to better understand lay responders' intent to use lifesaving skills.

Questionnaire items were compiled into 10 behavioral domains informed by the TPB constructs followed by refinement via piloting and expert review. Two samples from an American Red Cross-trained lay-responder population ( N = 4,979) provided data for an exploratory (EFA, n = 235) and confirmatory (CFA, n = 198) factor analyses. EFA derived interitem relationships into factors and affective subscales. CFA yielded statistical validation of factors and subscales.

The EFA identified four factors, aligned with the TPB constructs of attitudes, norms, confidence, and intention to act to explain 57% of interitem variance. The internal consistency of factor-derived subscales ranged between 0.71 and 0.91. Reduction of instrument items went from 47 to 32 (32%). The CFA yielded good model fit with the switching of the legal ramification item from the social norm to intention construct.

The Intent to Aid (I2A) survey derived from this investigation aligned with the constructs of the TPB yielding four subscales. The I2A allows health education researchers to differentiate modalities and content impact on learner intention to act in a first aid (FA) emergency. I2A compliments cognitive and psychomotor measurements of learning outcomes. The experimental instrument aims to allow curricula developers and program evaluators a means of assessing the affective domain of human learning regarding intention-to-act in an FA emergency. In combination of with assessment of functional knowledge and essential skills, this instrument may provide curricula developers and health educators an avenue to better describe intention to act in an FA emergency.