Nevin Manimala Statistics

Video-based paired comparison to evaluate some cosmetic products under camera movement for dynamic performance

Int J Cosmet Sci. 2023 Mar 15. doi: 10.1111/ics.12857. Online ahead of print.


OBJECTIVE: Until now, standardized evaluation of cosmetic effects was conducted mainly in still conditions such as pictures. In real life, the consumers’ experience of their cosmetics’ effects is dynamic and some of the benefits can be better observed under movement. In order to capture motion-related performance of cosmetics, we developed a video-based paired comparison on an online platform.

METHODS: We validated this new tool through the evaluation of an eyeshadow with high light reflection and color gradation especially visible under motion according to the observer point of view. This formula was compared with two marketed benchmarks. The three products were applied sequentially on the eyelid of 8 Japanese women. Videos were taken in standardized light, speed and face position with a rotating camera around the face. The videos were uploaded on an online secured platform and eyelid 3D effect, highlight and color gradation were evaluated through paired comparison test by 60 Japanese women from home on their PC or tablets. Those results were compared with picture based paired comparison by the same observers.

RESULTS: Video based paired comparison provided higher discrimination of products compared to picture-based comparison.

CONCLUSION: As compared to still camera acquisition, the evaluation of cosmetics based on videos is closer to real life experience and can bring higher discrimination especially for motion-related attributes.

PMID:36919483 | DOI:10.1111/ics.12857

By Nevin Manimala

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