Although prior research has shown that information utilized during conceptual design plays a vital role in product success, there is no comprehensive framework for characterizing the types of knowledge used by designers, or the impact of information types on the development of successful ideas. As part of an ongoing effort to develop a Typological Framework of Design Information, this study focuses on understanding the impact of design reasoning using one dimension of information, effectual or causal information. Effectual reasoning refers to setting goals that are driven by the availability of resources that are available to the designer, which is in contrast with causal reasoning, which relies taking actions to achieve a predetermined goal by any means necessary. Since research on effectual and causal information in engineering design is relatively sparse, a controlled pilot study was conducted where students interacted with a web interface and addressed a design problem. Detailed observations of participants' interactions with the design information and the creativity of design outcomes was investigated. These findings provide insights into the role that effectual information plays in design reasoning and contribute to an emerging Typological Framework of Design Information.