1 / 4

David MacGowan and Andy Irving

In visual perception experiments, beware of the more elusive influences of cognition and neuro-physiology on the selection of subject population and size. David MacGowan and Andy Irving. Outline. Historical overview Experiments Recognition and avoidance of bias Summary. Historical overview.

vita
Download Presentation

David MacGowan and Andy Irving

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. In visual perception experiments, beware of the more elusive influences of cognition and neuro-physiology on the selection of subject population and size David MacGowan and Andy Irving

  2. Outline • Historical overview • Experiments • Recognition and avoidance of bias • Summary

  3. Historical overview • Weber Fechner law:y=k log(Fratio) • Stevens SS: y=k (Fratio)a • Hopkinson RG:Glare Index, small sourceGI = 10 log10kLs1.6w 0.8 / Lb • Large sources: GI = 10 log10kLs1.6W0.8 / Lb + 0.07w0.5Ls

  4. Bias • Bias is difficult to handle in any human perception experimentation, and its influence can profoundly influence the resulting data and distort conclusions. • Skills bias (designer –architectural, engineering) • Confounding minimum acceptable window size data: Influence of view; geographical location (Winnipeg, Seattle,Berkeley and London); publicity (London replication of earlier RGH work); non-representative sample (miner’s) data. • Union v non-union discomfort glare data.

More Related