Memory for tone intervals is an important capacity in both speech and music. This memory is stronger in several tasks using musical material with familiar scale structures. However, many past researchers have used familiar scale structure and tonality as interchangeable concepts. As a result, there has been little investigation into the effect of familiar scale structure aspects apart from tonality. It is also unclear which aspects of familiar scale structures contribute to its effect on memory for tone intervals. A factorial experiment is proposed to examine the specific scale aspects of chromaticity and scale step spacing. Two more experiments are proposed to further examine the relationship between tonality perception and previously tested scale aspects. As aspects of familiar scale structures may contribute to tonal perception, the proposed experiments would clarify results from a previously conducted experiment where positive effects may occur as a result of emergent tonality rather than any property of the scale aspect itself.