This thesis aims at gaining a deeper understanding of how consumers perceive
product newness and how perceived newness affects the market success of new
product introductions. It builds on theories in psychology that identified “collative”
variables closely associated with newness perceptions on the part of the consumer.
Also, it explores the effect of newness on market success after one year and the
pattern of market success during that time period.
It is hypothesized that perceived newness is a two-dimensional (rather than unitary)
construct and that its two dimensions, (1) mere perception of newness and (2)
perceived complexity, have different effects on product liking and market success
over time. Consistent with our hypotheses, product liking linearly decreases with
perceived complexity and cross section analysis reveals the same relationship with
market success after one year. The hypothesized inverted-U shaped relationship does
not hold in the case of product liking as it linearly increases with perceived
incongruity (i.e. mere newness perception). In contrast, and consistent with our
hypothesis, cross section analysis reveals an inverted-U relationship between
perceived incongruity and market success after one year. Over time, the key findings
from this work emphasize that high perceived product complexity is a disadvantage to
new product success in the short run. However, market success of complex products
increases over time once initial rejection is overcome (i.e. learning to like). In
addition, the mere perception of newness does not appear to have a significant effect
on the shape of the diffusion curve. Finally, for a given product, qualitative
comparisons between countries suggest that incongruity and complexity may
differentially participate to overall newness and therefore affect liking.
Overall, the thesis reveals the importance of considering product newness as a two-
dimensional construct since each of these dimensions brings in key information to
explain consumers’ response to innovative products.

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