Recent psychophysical studies using the "Method of Adjustment"?
The recent visual working memory literature has predominately used the method of adjustment. In particular, there is a lot of work using continuous color adjustment tasks:

Wilken P., Ma W. (2004). A detection theory account of change detection. Journal of Vision, 4 (12): 11, 1120–1135.

Zhang, W., &amp; Luck, S. J. (2008). Discrete fixed-resolution representations in visual working memory. Nature, 453(7192), 233-235.

Here's a recent open access paper using the method of adjustment:

Brady, T. F. and Alvarez, G.A. (2015). Contextual effects in visual working memory reveal hierarchically structured memory representations. Journal of Vision.
http://jov.arvojournals.org/article.aspx?articleid=2471226