Welcome to StimSelect
The main use of StimSelect is to identify training and test items for an artificial grammar learning (AGL) study. See using_stimselect.html for an introduction to using StimSelect.
StimSelect can also compute characteristics of existing stimulus sets (see prior_stimuli_sample.html).
Contents
What's new in v0_7c?
As of 6 September 2013 (AGLSS0_7c), potential G and NG items can be specified explicitly to AGLSS instead of using a grammar. This often means that StimSelect can work with the full set of potential items of interest instead of working with a random sample from a large set of unconstrained NG symbol strings. Also, with a more specific set of potential items, choose_items can be much faster. See using_stimselect.html#2.
What's new in v0_7b?
As of 3 September 2013 (AGLSS0_7b) a new choose_more_items method allows multiple rounds of stimulus selection. This is especially useful if it is necessary to choose at least two new training items for every test item (e.g. if there are at least two test sets that require familiar items). See using_stimselect.html#5.
In addition, the following bugs were fixed:
- add_test_items.m permanently excluded items once they were identified as dynamic exclusions. This meant that the familiarity factor could not draw on a growing list of training items on subsequent rounds.
- "Reference to non-existent field" error in testset_newtrain.m, caused by new familiarity factor when combined with another factor like chunk strength.
- isgrammatical.m allowed strings that were entirely parsed even if they did not reach a valid end state.
What's new in v0_7?
From 2 September 2013 (AGLSS0_7)
- gram_factor allows a particular grammar to be specified. See gram_factor.html.
- fam_factor has been added, to allow test sets of Old vs New items. See fam_factor.html.
- Choose_items has an additional optional parameter to specify whether training items are eligible to be included in test sets. See using_stimselect.html#5.
Previous changes
See ChangeLog.m for information on previous changes to StimSelect.