Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Properties of some variants of adaptive staircases with fixed step sizes

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Spatial Vision
For more content, see Multisensory Research and Seeing and Perceiving.

Because the estimation of thresholds is daily practice in sensory psychophysics, efficient methods must be used to reduce experimental cost and burden. A large number of such methods are available, and each one further has a multitude of variants. All methods presumably provide a threshold estimate that is the stimulus level at which repeated testing would result in a specific percentage of correct responses on a forced-choice task, a percentage that varies across methods and variants thereof. A recent study (García-Pérez, 1998) showed that the most popular method (up-down staircases with fixed step sizes) yields threshold estimates that do not correspond to the presumed percent-correct points. Two modifications of this type of staircase have recently been proposed. In one (Zwislocki and Relkin, 2001), the up-down rule does not require correct responses to occur consecutively. In the other (Kaernbach, 1999), subjects are allowed to respond 'don't know' instead of guessing at random when unsure. Although the statistical basis of either modification were described in general, only a few of their many variants were subjected to evaluation under a limited set of conditions. This paper provides an extensive evaluation of a reasonable number of variants of either modification under a broad set of conditions. The results show that they are generally unfit for threshold estimation because in most cases the percent-correct point that is targeted varies greatly with the relative size of the steps with respect to the spread of the psychometric function. Dependable conditions for the use of these modified staircases are also determined.


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
    Spatial Vision — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation