Older adults are particularly susceptible to cognitive biases that could potentially impact the quality of their decisions in e-commerce environments. This may negatively affect their online experience, depriving them from reaping the full benefits of e-commerce. It is thus important to explore this domain with the objective of assisting older adults in making higher quality decisions in e-commerce contexts. This research-in-progress paper takes on this challenging inquiry through a two-stage study to (i) understand how the decision making styles of older adults interact with cognitive biases affecting their decisions’ quality in e-commerce and how these interactions vary by product type; and (ii) understand the influence of decision aids in de-biasing older adults with different decision making styles under the stimuli of cognitive biases and how this varies by product type. We outline a detailed exploratory experimental methodology for this proposed research as well as potential contributions to theory and practice.