InstantForum 2017-1 FinalMillisecond Forumshttps://forums.millisecond.com/Millisecond ForumsFri, 18 Sep 2026 22:51:11 GMT20https://forums.millisecond.com/Topic18883.aspxHello,<br/>I'm currently trying to run a simple word vs. non-word lexical decision task. There are 21 category (i.e., target) words, 21 neutral words, and 42 non-words. This is my script for the block:<br/><br/>&lt;block lexicalDecisionTask&gt;<br/>/ trials = [1=instructions; 2-85=noreplace(ldtcategory, ldtneutral, ldtnonword)]<br/>&lt;/block&gt;<br/><br/>However, I noticed that some words are&nbsp;appearing more than once. I just want ALL of the words (category, neutral, and non-word) to appear ONLY ONCE. How do I need to re-word the script? Thanks!<br/>Mon, 11 Apr 2016 14:52:27 GMTsanahaddhttps://forums.millisecond.com/Topic18885.aspxThe answer entirely depends on how many items there are for each type of trial.<br/><br/>/ trials = [1=instructions; <strong>2-85=noreplace(ldtcategory, ldtneutral, ldtnonword)</strong>]<br/><br/>You are running a total of 84 trials here, and you have instructed the script to run ldtcategory, ldtneutral, and ldtnonword in *equal* proportions: There will be 28 ldtcategory trials, 28 ldtneutral trials, and 28 ldtnonword trials.<br/><br/>If, for example, you have twice as many ldtnonword items (42) as ldtcategory and ldtneutral items (21 each), that needs to be reflected in the proportions you enter:<br/><br/>/ trials = [1=instructions; <strong>2-85=noreplace(ldtcategory, ldtneutral,<span style="text-decoration: underline;"> ldtnonword, ldtnonword</span>)</strong>]<br/><br/>will result in 21 ldtcategory trials, 21 ldtneutral trials, and twice as many -- 42 -- ldtnonword trials, a 1:1:2 ratio.<br/><br/>You will find this covered in the documentation for the &lt;block&gt; element's /trials attribute.<br/>Mon, 11 Apr 2016 14:52:27 GMTDave