A facility for providing a workflow tailored to defining a project for collecting multimodal data from each of a set of crowdsourcing or microtasking platform workers is described. The facility enables customers of a crowdsourcing or microtasking platform to easily define multimodal data collection projects. The facility enables customers to define any of the following types of information associated with multimodal data collection projects: worker requirements, project environment parameters, video data, audio data, physiological data, and/or location-related data. Some of this data is collected using different kinds of sensors in one or more devices (e.g., smart phones, fitness wearables, etc.) associated with the crowdsourcing or micro-tasking platforms' workers. Prior to computing data results generated by executing a multimodal data collection project, the facility an align at least a first portion of the collected data with a second portion of the second data.