Changes in version 0.3 (2023-08-19)                   

    o   documentation fix in dprime.SD

    o   corrected version misalignment in package man page and Description file

                 Changes in version 0.2-3 (2022-01-03)                  

    o   changed URL's to DOI's for JSS citations

                        Changes in version 0.2-1                        

    o   added ... to initial functions of SS.calib and SS.RGBcalib to accomadate
	   passing trace and control arguments for nls as required for R > 4.0.3.

                        Changes in version 0.2-0                        

    o   fixed title case per CRAN standards

                 Changes in version 0.1-7 (2012-07-29)                  

    o   substituted binomial()$linkinv and binomial()$mu.eta for uses of
	   .Call in mafc and mafc.logit and logit.2asym link functions. 

    o   eliminated some triple colons from examples

                 Changes in version 0.1-6 (2011-10-14)                  

    o   removed LazyLoad from Description

                 Changes in version 0.1-5 (2011-06-29)                  

    o   added possibility for dprime.SD to give negative values (with a warning)
	   for the IO method (suggested by Sverre Stausland)

    o   increased the range of possible d' values obtainable from dprime.SD to 10
	 (was 5) for method "diff". 

                 Changes in version 0.1-4 (2011-06-24)                  

    o   the argument name of the mafc links (mafc.logit, mafc.probit, etc.)
	   has been changed from m to .m.  This should permit these links to
	   work with the glmer function in the lme4a, the development version
	   of lme4.

    o   dealt with some warnings concerning potential partial argument matching

                 Changes in version 0.1-3 (2009-09-28)                  

    o   dprime.SD was failing for small values of H and FA when equal
	   (thanks to Paul Willis) 

                 Changes in version 0.1-2 (2009-08-21)                  

    o   fixed some warnings for Rd files

                 Changes in version 0.1-1 (2009-01-26)                  

    o   fixed an unmatched parenthesis in summary.lambda.Rd

    o   fixed a double dot '..' in the name of an Rd file that did not belong

                 Changes in version 0.1-0 (2009-01-14)                  

    o   second graphic of mafc example set to aspect = "xy" for better 
	rendition

    o   modified column names of data set ecc2 from nyes, nno to 
	Correct and Incorrect, better reflecting the meaning of these
	variables.

                 Changes in version 0.0-9 (2008-10-24)                  

    o   added standard error estimates based on the Hessian from last iteration 
	of optim to the output of psyfun.2asym (suggested by Ralph Pirow).

                 Changes in version 0.0-8 (2008-07-15)                  

    o   added additional links that include parameters for both upper and lower  
	asymptotes and a function, psyfun.2asym, that is a wrapper for glm and 
	uses the new links to fit a psychometric function with variable lower and 
	upper asymptotes.

                 Changes in version 0.0-7 (2008-06-06)                  

    o   added mafc.weib link that is just an alias for mafc.cloglog

    o   added mafc.cauchit link

                 Changes in version 0.0-6 (2008-06-02)                  

    o   added an mafc link for the cloglog link, which permits fitting Weibull
	psychometric functions on a log stimulus axis.  See example(mafc).