bug fix single-stim
bug fix single-stim

shamrt/jsPsych,erikasf/jsPsych,jspsych/jsPsych,Scienthusiast/jsPsych,andyh616/jsPsych,vergenzt/jsPsych,jspsych/jsPsych,adrianoesch/jsPsych,shamrt/jsPsych,Scienthusiast/jsPsych,erikasf/jsPsych,msrresearch/jsPsych,andyh616/jsPsych,adrianoesch/jsPsych,jodeleeuw/jsPsych,jspsych/jsPsych,jspsych/jsPsych,vergenzt/jsPsych,wolfgangwalther/jsPsych,wolfgangwalther/jsPsych